Amin Construction Pvt Ltd
Environmental Impact Assessment Report
Harbor development project Kinbidhoo, Thaa Atoll
January 2012 c
Declaration of the Project Proponent and commitment letter
Re: EIA report for proposed harbor development at Thaa Kinbidhoo
As the proponent of the proposed project We guarantee that We have read the report and to the best of Our knowledge all non-technical information provided here are accurate and complete. Also We hereby confirm Our commitment to finance and implement all mitigation measures and the monitoring program as specified in the report
Signature:
Name:
Designation:
Date:
Declaration of the Consultant
I certify that statements made in this Environment Impact Assessment Report Harbor Development project at Kinbidhoo, Thaa Atoll, to best of my knowledge are true, complete and correct.
Name: Hussein Zahir
Consultant Registration Number: 04-07
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Table of Content
EXECUTIVE SUMMARY ...... 1 1. INTRODUCTION ...... 3 a) Purpose of the Report and Need for the EIA ...... 3 b) Structure of the Report ...... 3 2. PROJECT SETTING ...... 4 a) Environment Protection and Preservation Act of Maldives ...... 4 b) Third National Environmental Action Plan (NEAP III) ...... 5 c) National Biodiversity Strategy and Action Plan (NBSAP) ...... 6 d) Protected Areas and Sensitive Areas ...... 8 e) Cutting down, uprooting, digging out and export of trees and palms from one island to another ...... 8 3. PROJECT DESCRIPTION ...... 10 a) Project Proponent ...... 10 b) The Project ...... 10 c) Need for the Project ...... 10 d) Location and Extent of Site Boundaries ...... 11 e) Construction Phase and Schedule for Implementation ...... 12 f) Major Inputs ...... 14 i) Mobilization and material unloading ...... 14 ii) Workforce ...... 14 iii) Heavy machinery and power generation ...... 14 g) Construction methods ...... 15 i) Demolition works ...... 15 ii) Excavation method ...... 15 iii) Construction of wharf and harbor protection structure ...... 15 h) Major Outputs ...... 16 i) Harbor design ...... 16 ii) Dredge material ...... 16 iii) Risks Associated with the Project ...... 16 4. Methodology ...... 17 5. Public Consultation ...... 20 a) Institutional Arrangements ...... 20 b) Community consultations and stakeholder meetings ...... 20
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c) Consultation with MHE ...... 21 d) Outcome of the consultation meetings ...... 22 6. Existing Environment ...... 23 a) General Setting ...... 23 b) Geographical location and general setting of Th. Kinbidhoo ...... 24 c) Climate and Oceanography ...... 24 i) Wind climate ...... 24 ii) Rainfall ...... 26 iii) Tide ...... 27 iv) Wave ...... 31 d) Beach Environment ...... 35 e) Marine Surveys ...... 38 i) Sea grass ...... 39 ii) Coral community ...... 39 iii) Reef fish community ...... 40 iv) Seawater quality ...... 41 f) Hazard vulnerability, area vulnerable to flooding and storm surges ...... 42 g) Social Environment ...... 45 h) Terrestrial Environment ...... 46 i) Built Environment ...... 46 7. Environmental Impacts ...... 48 a) Limitation and uncertainty of impact prediction ...... 49 b) Construction Impacts ...... 49 i) Schedule, logistics and loading and unloading construction materials ...... 50 ii) Construction materials and solid waste ...... 50 iii) Impacts due to construction methods ...... 51 iv) Impact on vegetation ...... 52 v) Coastal structures ...... 52 vi) Social impacts, noise and air pollution ...... 52 vii) Effects on Groundwater Quality ...... 53 c) Operational Impacts ...... 53 d) Impact Analysis ...... 54 8. Mitigation Plan ...... 57 9. Alternatives ...... 61 a) Breakwater types ...... 61
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b) Quay wall ...... 61 c) The no project scenario ...... 61 10. Monitoring and Reporting ...... 63 11. Conclusions ...... 65 12. Appendices ...... 66
List of Tables
Table 1 Construction schedule for Kinbidhoo harbor development project ...... 13 Table 2 Four seasons experienced in the Maldives ...... 25 Table 3 Principle tidal constituents (Defant 1961) ...... 28 Table 4 Classification of tides ...... 29 Table 5 Amplitude of the tidal constituents determined by harmonic analysis of the tide 30 Table 6 Seasonal wind and wave climate around southern atolls of Maldives ...... 32 Table 7 Seawater quality parameters tested and their results at the sampling locations at Kinbidhoo. (Data analysis was carried out using portable water test probe Hanna Multi- probe water test kit. Values are means and standard deviation of means. n=5 for each location) ...... 42 Table 8 Impact prediction categorized…………………………………………………………48 Table 9 Leopold matrix for Kinbidhoo harbor expansion project ...... 55 Table 10 Mitigation measures proposed for the harbor restoration works at Kinbidhoo . 58 Table 11 Monitoring program and cost for individual parameter ...... 64
List of Figures
Figure 1 Existing location of the harbor and possible sediment plume projection associated with dredging works ...... 11 Figure 2 Location beach profiles an GPS coornidates…………………………………….….18 Figure 3 Reef survey and water sampling locations and GPS coordinates ...... 19 Figure 4 Geographic location of Maldives in Indian Ocean ...... 23 Figure 5 Geographic location of Kolhumadulu Atoll in the Maldives chain of Atoll (a) Map of Kolhumadhu atoll showing locatio n of Kinbidhooo (b) Satellite image of Kinbidhoo (C)…………………………………………………………………………………………………….24 Figure 6 Summary wind data indicating the wind speed, direction and percentage of occurrence of wind from different directions for the four seasons (wind data between 1995 to 2010 –Kadhoo wind data set) ...... 26 Figure 7 Eight year (1994-2001) climatology of rainfall for all the stations of Maldives ... 27 Figure 8 Comparison of the measured and predicted tide for the wave gauge 13...... 28 Figure 9 Tide showing the mixed nature. For simplicity only January 2010 is shown here ...... 31 Figure 10 Spectral analysis of the tidal constituents ...... 31 Figure 11 Wave height and period distribution in the southern parts of the Maldives .... 34 Figure 12 Assumed wave climated of the reef systen ...... 35
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Figure 13 Shoreline view from the T jetty looking westwards. Image on the left during high tide and image on the right during low tide……………………………………………..36 Figure 14 Eastern shoreline viewed from the T jetty (left), southern side of the island observed with severe erosion (right) ...... 36 Figure 15 Sea wall area at the eastern side of the island ...... 37 Figure 16 Beach profile 1………………………………………………………………………….37 Figure 17 Beach profile 2………………………………………………………………………….37 Figure 18 Beach profile 3………………………………………………………………………….38 Figure 19 Beach profile 4……………………………………………………………………….…38 Figure 20 Sea grass observed near the harbor area, sea grass bed is observed almost up to the low tide line area. Many patches of brown filamentous algae was observed at the area...... 39 Figure 21 Benthic substrate recorded at reef monitoring site in Kinbidhoo ...... 40 Figure 22 Live coral composition at the reef survey site in Kinbidhoo…………………..…40 Figure 23 Tsunami hazard zones, category 5 is the highest risk zone while category 1 is the lowest (figure derived from UNDP report Disaster Risk Profile for Maldives Nov, 2006…………………………………………………………………………………………………..42 Figure 24 Track of severe storms affecting Maldives during 1877-2004 ...... 43 Figure 25 Cyclone Hazard Zoning (figure derived from UNDP report on Disaster Risk Profile for Maldives November 2006) ...... 44 Figure 26 Surge hazard zones (figure derived from UNDP report on Disaster Risk Profile for Maldives November 2006)………………………………………………………………….. . 44 Figure 27 Population structure of Kinbidhoo ...... 45 Figure 28 General condition of T jetty at Kinbidhoo…………………………………………..44 Figure 29 View of jetty head area during low tide...... 47
List of Appendices
Appendix 1 Terms of Reference (TOR)
Appendix 2 Site Plan, Breakwater and quay wall design Appendix 3 Bathymetry and shoreline map Appendix 4 List of people met Appendix 5 References Appendix 6 CVs
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EXECUTIVE SUMMARY
1. This Environmental Impact Assessment (EIA) report is to fulfill the regulatory requirements under the Environmental Protection and Preservation Act of Maldives prior to the proposed harbor development at Kinbidhoo in Thaa Atoll. 2. Project proponent of the proposed harbor development project is Ministry of Housing and Environment. The contractor for the project is Amin Construction Pvt Ltd. 3. Kinbidhoo is located in Thaa atoll, approximately 228km from Male’. It is one of the 13 inhabitant islands in the atoll. Nearest inhabited island is Th. Veymandoo which is located 3.89km north east of Kinbidhoo. In terms of geographic coordinates, it is located at 2° 10' N and 73° 3' E. Nearest island is Kudakinbidhoo, approximately 0.54km south west of Kinbidhoo. 4. The proposed development project involves construction of a harbor facility at Th. Kinbidhoo. This project is being undertaken as part of the National Harbor Construction Project conducted by the Ministry of Housing and Environment. The harbor facility will be located at the north western side of the island approximately 10m off the shoreline at north eastern side and 50m off shore line at the south western side starting from existing “T” jetty. The entrance to the harbour will be located at the northern side. The quay wall will be constructed with “L” section concrete sheet pile, while breakwaters will be rock boulders. The harbor basin will be deepened to -3MSL. 5. Part of the existing T jetty will be demolished using excavators. The demolished material will be used for back filling of harbor side quay area. The demolition works will be done prior to excavation of the proposed basin. 6. The proposed harbor is 152.5m long and 76.2m wide. Breakwater segment will be constructed at the northern side of the harbor with a total length of 185m, while the exposed side of existing T jetty (excluding the part cut to make way for entrance to deep lagoon) will have a revetment structure. The side quay walls will have a length of 61m. The total quay wall length of the harbor is 274.5m. 7. An entrance will be cut to deep lagoon from the northern side of the harbor with length 140 and width 24m. The design depth of entrance and harbor basin is -3MSL. 8. Dredge material removed from the harbor basin and entrance (entrance to deep lagoon) will be disposed at either side of the harbor (eastern and western side) and harbor front area. Approximately 33,000m3 of dredge material will be removed during the maintenance and harbor dredging works. All dredged material generated will be used to reclaim land at the harbor front and side quay areas. 9. Major outcome of the consultation meetings is issue of opening at the western side and maintenance dredging at the existing entrance to deep lagoon. - CID requested for EIA consultant to propose mitigation for the issue
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- Maintenance dredging at existing entrance is not included in the EIA or project scope. Although this maybe the case environmental impact due to maintenance dredging to be included in the report 10. Existing environment was examined to identify significant environmental components that would be affected and to establish a baseline condition of the site. Available and relevant literature on environmental impacts associated with similar projects was evaluated to identify possible impacts. Oceanographic data and information on local hydrodynamics were qualitatively assessed to determine the current pattern around the island which was based on monsoonal wind patterns, wind generated waves, tidal flushing, geographic setting, the topography of the lagoon and shape of the shoreline. 11. Mitigation measures have been provided for impacts associated with the project related works that have been categorized as minor to moderate. Impact mitigation measures and monitoring is carried out to compare predicted and actual impacts occurring from project activities to determine the efficiency of the mitigation measures. 12. With due consideration to main environmental components identified and the magnitude of impacts on these components from the proposed developments, the consultant concludes that the project components and designs are feasible and appropriate mitigation measures are given to correct and minimize unfavorable environmental consequences. Furthermore, the public and community consultation responses were in favor of the project due to the socio-economic benefits foreseen to the community from a functional harbor.
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1. INTRODUCTION
The proposed project involves harbor development works at Th. Kinbidhoo. The project is implemented by the Ministry of Housing and Environment; while the contractor for the project is Amin Construction Pvt Ltd. The design of the harbor was formulated by MHE in consultation with the island community.
a) Purpose of the Report and Need for the EIA This EIA covers the environmental reporting requirements in preparation for harbor development project as stipulated by the environmental regulations of Maldives. Coastal developments such as harbors that are likely to have significant impacts on the environment are required to submit an EIA or IEE report by Environmental Act of Maldives. Article 5 (a) of the Environmental Protection and Preservation Act of Maldives (Law No. 4/93) provides for an impact assessment study to be submitted to the Environmental Protection Agency (EPA) before implementation of any activity that may have a significant impact on the environment. The Environmental Impact Assessment Regulation of Maldives (EIA Regulations, MEEW, 2007) provides a list of development proposals requiring environmental impact assessment reports which are outlined in Schedule D of the regulation where EIAs are mandatory for harbor development projects.
Therefore, in accordance with the above requirements and procedures to follow under the EIA regulations, a scoping meeting to discuss the development proposal and determine the Terms of Reference (TOR) for the EIA report was held between the Client (Ministry of Housing and Environment, MHE), LaMer Group Pvt Ltd as the EIA Consultant, representative of contractor (Amin Construction Pvt Ltd) and representatives from Environment Protection Agency (EPA) on 18th October 2011. This report provides the results of the field work carried out on Kinbidhoo in December 2011 and associated public and community consultations that followed based on the TOR approved by EPA.
b) Structure of the Report The structure of this report follows the Terms of Reference (TOR) discussed in the presence of the developer, the EIA consultant, representative from MHE and representatives of EPA. Upon submission of a draft TOR by the EIA consultant it was approved by the EPA on 14th December 2011, based on discussions between the consultant, the client and other stakeholders. The approved Terms of Reference (TOR) for this report is attached in Appendix 1 of this document.
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2. PROJECT SETTING
The project conforms to the requirements of the Environmental Protection and Preservation Act of the Maldives, Law no. 4/93. The EIA has been undertaken in accordance with the EIA Regulation (MEEW, 2007) of the Maldives by a registered consultant. Furthermore, the EIA adheres to the principles underlined in the regulations, action plans, programs and policies of the following Government Ministries.
Ministry of Housing and Environment Ministry of Home Affairs
a) Environment Protection and Preservation Act of Maldives The Articles of the Environmental Protection and Preservation Act (Law No. 4/93) addresses the following aspects of environmental management:
Guidelines and advice on environmental protection shall be provided by the concerned government authorities. Formulating policies, rules and regulations for protection and conservation of the environment in areas that do not already have a designated government authority already carrying out such functions shall be carried out by MEEW (now known as MHE). Identifying and registering protected areas and natural reserves and drawing up of rules and regulations for their protection and preservation. An EIA shall be submitted to MHTE (now MHE) before implementing any developing project that may have a potential impact on the environment. Projects that have any undesirable impact on the environment can be terminated without compensation. Disposal of waste, oil, poisonous substances and other harmful substances within the territory of the Maldives is prohibited. Waste shall be disposed only in the areas designated for the purpose by the government. Hazardous / Toxic or Nuclear Wastes shall not be disposed anywhere within the territory of the country. Permission should be obtained for any trans‐boundary movement of such wastes through the territory of Maldives. The Penalty for Breaking the Law and Damaging the Environment are specified. The Government of Maldives reserves the right to claim compensation for all damages that are caused by activities that are detrimental to the environment.
The proposed harbor development project at Kinbidhoo will fully abide by the Environmental Protection and Preservation Act. Disposal of oil, chemicals and other hazardous materials will
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be strictly controlled and managed. Such materials will not be disposed at inappropriate locations in the local or the regional vicinity, but will be transported to a designated waste disposal site, in Thaa Atoll or any other government approved disposal site. In any event, hazardous wastes such as oils and chemicals which are not allowed disposal at site will be transported to Thilafushi for appropriate disposal.
b) Third National Environmental Action Plan (NEAP III) The Third National Environment Action Plan (NEAP III) of Maldives sets out the agenda for environmental protection and management in the Maldives for the period of 2009 – 2013. This plan targets to achieve six major measurable environmental results that matter to the people of the Maldives, through a set of ten principles and thirty goals.
Under the NEAP III, the following principles shall be adhered to in environment protection and environmental management.
1. Environmental protection is the responsibility of every individual 2. Achieve results 3. Promote and practise sustainable development 4. Ensure local democracy 5. Inter-sectoral co-ordination and co-operation 6. Informed decision making 7. Precaution first 8. Continuous learning and improvement 9. Right to information and participation 10. Environmental protection complements development
Targeted results to be achieved and the goals set to achieve these results are:
Resilient Islands: Protection of critical infrastructure and human settlements, Increased resilience of coral reef systems to climate change, Reduced climate-change related risks to human health, fisheries and food production and the tourism sector Preparedness for natural disasters and mitigation of such disasters.
Rich Ecosystems: Improved scientific knowledge and better access to information for biodiversity conservation,
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Improvement of institutional and legislative systems to enable biodiversity conservation, Protection and restoration of coral reefs, vegetation, terrestrial ecosystems and islands and wetlands and mangrove ecosystems Control of invasive species
Healthy Communities: Proper solid waste and hazardous waste management, Safe use of and disposal of chemicals and clean air
Safe Water: Provision of safe drinking water, Protection of groundwater and the seas Operationalize wastewater treatment to maintain resilience of water resources and coral reef biodiversity in the face of climate hazards
Environmental Stewardship: Efficient Environmental Administration, Effective environmental legislation, Strengthened Environmental Impact Assessments and capacity to plan and manage environmental education and public awareness programmes, Environmental research Environmental information
Carbon Neutral Nation: Country wide awareness on what being Carbon neutral means and the importance and advantages of becoming carbon neutral, Advance Energy Security Establish an Efficient Transport Network
NEAP III provides the basis for environmental planning, budgeting, performance measurement, and accountability.
c) National Biodiversity Strategy and Action Plan (NBSAP) Biological diversity on a whole refers to the total variety of life on earth; inclusive of genetic, species and ecosystem diversity. Earths’ ecosystems are made up from the linkage of biodiversity at various levels and provide the supplies and services crucial for human well being. Past, present
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and future generations have been, are and will be dependent on these systems remaining healthy and robust, thus ensuring the need and significance of conservation of these systems.
UNEP initiated work on the Convention of Biological Diversity (CBD) to address the need of conservation of these resources on a global scale. CBD was opened for signature on 5 June 1992 and Maldives became a signatory on 12th June 1992, followed by ratification on the 28th of October 1992. One of the most important obligations on signing CBD was the development of a National Biodiversity Conservation Strategy and Action Plan. Work on formulation of the National Biodiversity Strategy and Action Plan of the Maldives (NBSAP) commenced in 1996.
The objective of NBSAP was to “achieve biodiversity conservation and sustainable utilization of biological resources in the Maldives” by integration of biodiversity conservation into all areas of national planning, policy development and administration (MHAHE, 2002). The goals of NBSAP are:
1. Conserve biological diversity and sustainably utilize biological resources 2. Build capacity for biological diversity conservation through a strong governance framework and improved knowledge and understanding 3. Foster community participation, ownership and support for biodiversity conservation
These goals are achieved through the following objectives and actions:
Integration of biodiversity conservation into the national development process, by formulation and adoption of suitable development planning procedures, land use plans and strengthening of the EIA process Adoption of policies and management systems for sustainable use of resources, by development of consistent and appropriate national and sectoral policies and better management practices Establishment of measures for in-situ and ex-situ conservation by means of protected areas, suitable quarantine facilities, strengthened coral reef conservation measures and mechanisms for protecting wetlands and mangrove areas Management of threats and threatening processes by actions taken at the national and international levels Adoption of economic incentives via establishment of various methods to value biodiversity Improvement of knowledge and understanding and increased awareness by means of various research activities and awareness raising programmes aimed at all levels of society (grassroots to policy level) Strengthening legal and institutional frameworks and developing human resources by reviewing existing laws and regulations, strengthening enforcement and implementation capability, capacity building and effective communication and coordination
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Building financial capacity through annual government budget contributions, conservation funds and international funding donors Increasing community participation via development of co-management partnerships and skills development, empowerment and mobilization of local communities Implementation of NBSAP will be lead by the Ministry of Home Affairs, Housing and Environment with active participation from relevant agencies
d) Protected Areas and Sensitive Areas Under Article 4 of the Environment Protection and Preservation Act, the Ministry of Environment (now MHE) is vested with the responsibility of identifying and designating protected areas and natural reserves and drawing up of rules and regulations for their protection and preservation. At present there are no rules and regulations made available to the public on designation and protection of habitats and heritage areas.
e) Cutting down, uprooting, digging out and export of trees and palms from one island to another Pursuant to law number 4/93 (Environment Protection and Preservation Act of Maldives), the Ministry of Environment, Energy and Water (now MHE) has passed a by-law with the purpose of educating developers on the importance of trees. This includes best management practices for maintaining trees and provides standards for preservation of trees in the Maldives and set down rules and regulations to be adhered to prior to commencing of felling, uprooting, digging up and exporting of trees and palms from one island to another in Maldives.
The by-law states that the cutting down, uprooting, digging up and exports of trees and palms from one island to another can only be done if it is absolutely necessary and there is no other alternative.
It further states that for every tree or palm removed in the Maldives two more should be planted and grown on the island. The by-law prohibits the removal of the following tree types:
The coastal vegetation growing around the islands extending to about 15 meters into the island are protected by this by-law; All the trees and palms growing in mangrove and wetlands spreading to 15 meters of land area is protected under this by-law; All the trees that are in a designated protected area; Trees that are being protected by the Government in order to protect species of animal/organisms that live in such trees; Trees/palms that are unusual in structure
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The proposed harbor will be located at the lagoon area at a minimum offset of 50m, therefore no impact is envisaged on shoreline vegetation from main harbor development or harbor front road. The existing T jetty area is observed with few coconut palms and Sea hibiscus trees. Since part of T jetty will be incorporated in to the harbor project boundary; few coconut palms will be removed and replanted elsewhere.
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3. PROJECT DESCRIPTION
a) Project Proponent Project proponent of the proposed harbor construction project is Ministry of Housing and Environment (MHE). The contractor for the harbor development works is Amin Construction Pvt Ltd.
b) The Project The proposed development project involves construction of a harbor facility at Th. Kinbidhoo. This project is being undertaken as part of the National Harbor Construction Project conducted by the Ministry of Housing and Environment. The harbor facility will be located at the north western side of the island approximately 10m off the shoreline at north eastern side and 50m off shore line at the south western side starting from the existing “T” jetty. The entrance to the harbor will be located at the northern side. The quay wall will be constructed with “L” section concrete sheet pile, while breakwaters will be rock boulders. The harbor basin will be deepened to -3MSL. The total length of quay wall (concrete sheet piles) constructed as part of harbor development is 274.5 m. A breakwater segment (armour rocks) will be constructed at the harbor area of length 185 m.
c) Need for the Project At present access to Kinbidhoo is by a T jetty constructed near the northern tip area of the island. An entrance is cut to the deep lagoon and excavated path made to T jetty area. During rough spells of SW monsoon the current and wind wave condition makes it very difficult to use the T jetty area. The island council office stated that very recently one trade vessel was damaged due to wind wave condition; the vessel struck the walls of T jetty and sustained major damages. The council also stated that due to bad weather and wave condition existing T jetty is badly damaged. At present only part of the T jetty is used for accessing the island.
Therefore due to difficulties faced by the community, safe access is vital. The community also stated that due issues with access to the island, travelling to other islands by domestic ferry system is also affected.
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d) Location and Extent of Site Boundaries Kinbidhoo is located in Thaa atoll, approximately 228km from Male’. It is one of the 13 inhabited islands in the atoll. Nearest inhabited island is Th. Veymandoo which is located 3.89km north east of Kinbidhoo. In terms of geographic coordinates, it is located at 2° 10' N and 73° 3' E. Nearest island is Kudakinbidhoo, approximately 0.54km south west of Kinbidhoo.
The proposed project involves harbor development at the north western side of the island and cutting an entrance to deep lagoon at the northern side of the harbor. Sediment plume is envisaged to be directed northwards due to this current pattern either side of the island (Figure 1). The drogue tracks recorded at either side of the island (east and west) showed that the current flow is from south to north probably generated due to the swell waves received at the southern side and set up created at the outer atoll reef flat area. The current is observed moving along the east and west side and converging at the deep lagoon northern side of the island. Current speed is observed to be decreasing afterwards. According to locals; all the waste dumped on the southern side waste disposal area is observed to be transported with the current to northern side deep lagoon area in front of the island.
Indirect impact area Direct physical impact area
Figure 1 Proposed location of the harbor and possible sediment plume projection associated with dredging works
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e) Construction Phase and Schedule for Implementation The harbor construction stage at Kinbidhoo is estimated to last 9 months. Below are the major sub components of the restoration works. Table 1 provides the expected work program and work schedule for the project.
Mobilization, material unloading Setting out and survey Dredging of harbor basin and reclamation Dredging of channel and reclamation Shipment of boulders and other materials to site Construction of breakwater Construction of revetments Manufacturing of quay wall structures, transport and shipment from Male’ Placing and laying of quay walls In-situ casting of pier capping beams Handing over Demobilization
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Table 1 Construction schedule for Kinbidhoo harbor development project
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f) Major Inputs
i) Mobilization and material unloading
All material for the proposed project will be transported to the site on landing crafts and barges. Materials for harbor development works will be unloaded at the existing jetty area and transported to the existing empty area near the T jetty. Temporary construction yard and storage site can be set up in the vicinity of the harbor facility (existing cleared area). Major vegetation clearance will not be required for construction site setting and construction material storage. Site clearance will be carried out using excavators. Large mature trees will be retained in general. Trees that require removal shall be relocated by replanting at harbor front area that is extended as part of the project (coconut palms observed at the existing T jetty structure).
ii) Workforce
The total workforce for the project is estimated at 30-35 workers. All workers will be accommodated in existing residential houses. Food and other facilities will be met by existing facilities on the island. No additional temporary sheds or accommodation units will be constructed. A container based office unit will be located at the project site as the site office. Major concrete works necessary for the construction works (assumed to be only capping beam sections and anchor blocks) will be carried out at the temporary construction yard (western side of the T jetty as proposed by the island council office).
iii) Heavy machinery and power generation
Heavy machinery to be used for the project are excavators (2 units), cranes, wheel loader and trucks (3 units). Excavators will also be used for demolition works (part of existing T jetty), construction of harbor protection walls and entrance channel walls. Power for the project site will be met by the island’s existing power house and portable generator. All fuel for the project will be stored in barrels (diesel for excavators, cranes and trucks).
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g) Construction methods i) Demolition works
Part of the existing T jetty will be demolished using excavators. The demolished material will be used for back filling of harbor side quay area. The demolition works will be done prior to excavation of the proposed basin.
ii) Excavation method
The harbor basin area will be dredged and deepened using excavators. Initially interim bonds will be made around the expansion area, after which, excavated material will be transported on land using the bonds. All dredged material will be transported to harbor front area after filling up of barge (where necessary) and unloaded for back filling the harbor front and side quay areas. The finish design depth of the harbor basin and entrance channel will be -3MSL (entrance channel to deep lagoon from harbor).
No blasting will be carried out under the proposed project. In the event hard substrate is encountered alternative means will be used (impact hammer).
iii) Construction of wharf and harbor protection structure
Concrete elements for the quay wall will be caste off site and transported when required. The element toe area will be deepened and leveled. After placing the elements, the toe area will be refilled and tie rods will be used to fix and anchor the L section to anchor slabs. This will be followed by the joining together of quay wall with a capping beam which are caste on site.
The side quay walls will be constructed at the eastern and western side of the harbor, each approximately 61m length. The breakwater will be constructed using armor stones. The breakwater segment at the western side of the entrance will have a length of 185m, while the eastern side will be a revetment structure of length 41.7m. Approximately 20m gap will be kept between the breakwater and the side quay walls at the western, allowing for maximum flushing of basin water.
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h) Major Outputs i) Harbor design
The proposed harbor is 152.5m long and 76.2m wide. Breakwater segment will be constructed at the northern side of the harbor with a total length of 185m, while the exposed side of existing T jetty (excluding the part cut to make way for entrance to deep lagoon) will have a revetment structure. The side quay walls will have a length of 61m. The total quay wall length of the harbor is 274.5m (see Appendix 2 for site plan, breakwater and quay wall drawings).
An entrance will be cut to deep lagoon from the northern side of the harbor with length 140m and width 24m. The design depth of entrance and harbor basin is -3MSL. Bathymetry of proposed harbor location is provided in Appendix 3 (bathymetry and shoreline map).
ii) Dredge material
Dredge material removed from the harbor basin and entrance (entrance to deep lagoon) will be disposed at either side of the harbor (eastern and western side) and harbor front area. Approximately 33,000m3 of dredge material will be removed during the maintenance and harbor dredging works. All dredged material generated will be used to reclaim land at the harbor front and side quay areas.
iii) Risks Associated with the Project
Only minor to moderate risks are envisaged due to the proposed project. Since excavators will be used for the dredging works, sedimentation is inevitable and this is an impact that will be unavoidable. But it has to be noted that the reef flat area is approximately 750m away from the proposed harbor area where majority of dredging will be done. The dredging works at the entrance will be done at deep lagoon area therefore sediment plume generated will be minor. Seawater quality deterioration and sedimentation impacts are envisaged. Coastal vegetation clearance is not required for the proposed project; but few coconut palms at the existing T jetty area will be removed. Erosion prone areas at the western and eastern side of the island are not expected to be impacted since the dominant current at the southern side dictates the sediment movement.
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4. Methodology
The approach to data collection and compilation of this report includes;
Consultation and discussion with the design consultants and engineers with regard to design and work methodology that would be used to implement the proposed activities Examination of proposed project activities, Examination of the existing environment to identify significant environmental components that would be affected, Consultation with major stakeholders to exchange information on the project and to follow the procedures required for the report, and Evaluation of available and relevant literature on environmental impacts associated with similar projects.
Information on existing environment was collected during the field visit to the project site during December 2011. General information on the existing environment was based on available secondary data, such as climatic data for Handhunmathi and Male’ atoll in general (National Meteorological Centre at Hulhule for tide and Kadhdhoo for wind respectively), because no site specific data was available. Due to the general uniformity of the climatic data along Maldives, wind climatic data from Kadhdhoo were considered applicable to the site given the lack of availability of site specific data and also the short time available for the preparation of the report to collect such data.
Nearest tide station is at Hulhule (230km north). Limited tide data is also available from L. Gan for Resort development EIA prepared by LaMer Group Pvt (EIA for City Hotel, Hospitality Institute and Resort Development at Bodufinolhu and Gasfinolhu, August 2011). This information was used for site specific tide related components of the project.
Oceanographic data and information used to determine the current pattern around the island was also based on monsoonal wind patterns, wind generated waves, tidal flushing, geographic setting, the topography of the lagoon and shape of the shoreline.
Beach profiles were taken using a digital level. Initially the beach toe of the island was mapped using precision GPS. Afterwards profile areas were selected based on possible impact areas due to the proposed project. Four profiles were taken to establish as baseline data. All beach profiles are aligned perpendicular to the beach. Location of beach profiles and GPS coordinates are given in Figure 2.
Since the proposed harbor is approximately 750m away from the inner reef flat and separated by a large deep lagoon, qualitative assessment was done at the sea grass area as part of marine surveys. One site (R1) was surveyed east of the existing of entrance as part of baseline data collection in the event maintenance dredging works is later included in the scope of work since
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Seawater sampling was conducted in-situ at two sites (W1 and W2) using Hanna multi probe water test meter (HI 9828). Location and GPS coordinates for reef survey and water samplings are given in Figure 3.
P3
P4
P1 P2
P1: 200 10’09”N, 73 03’51”E P2: 200 10’07”N, 73 03’46”E P3: 200 10’20”N, 73 04’09”E P4: 200 10’18”N, 73 04’10”E
Figure 2 Location of Beach profiles and GPS coordinates
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R1
W2 Q1 W1
Q2
R1: 200 10’44”N, 73 04’09”E Q1: 200 10’26”N, 73 04’12”E Q2: 200 10’16”N, 73 03’50”E W1: 200 10’20”N, 73 04’02”E W2: 200 10’29”N, 73 03’59”E
Figure 3 Reef survey and water sampling locations and GPS coordinates
Near current assessment was done using drogues. A drogue was incorporated with a high precision GPS. The drogue tracks were recorded at 30s interval. The line generated was exported to excel using Pathfinder software in ASCII format. Initially distance between two points was calculated and afterwards speed using the logging interval.
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5. Public Consultation
As part of the public consultation process for this harbor development project, relevant stakeholders from the public and private sector were consulted and discussions were exchanged on project activities. The need, justifications and approval of the proposed activities from the perspective of relevant institutions were inclusive of this consultative process. The consultative process is based on meetings and discussions with representatives of relevant stakeholders. Perceptions of the community in the vicinity of the proposed project site based on specific focus groups such as island officials, and other relevant key individuals from the island were also included in this consultative process. List of people met in this consultative process is given in Appendix 4.
a) Institutional Arrangements Kinbidhoo is administratively located in Thaa Atoll (South Central Province of Maldives). As with all other atolls of the Maldives, the island community is governed through the Ministry of Home Affairs and the National Office of the South Central Region. Day-to-day administrative and management of the island community needs together with routine reporting to relevant ministries or other institutions in Male’ is managed by the Island Councilor and with support from the Island Council Office administrative staff.
Kinbidhoo harbor development project is being carried out under the National Harbor Development Project (Access program). The project is implemented by Construction and Infrastructure Department of Ministry of Housing and Environment. The contractor for the project is Amin Construction Pvt Ltd. A site office will be established at the project area, where information about the project and progress of the project will be available to the community where necessary.
b) Community consultations and stakeholder meetings Consultation meeting at Kinbidhoo was held at the Island Council office on 7th December 2011. Members of the island council, boat owners and boat operators were informed about the process of EIA and the government regulations on Environmental Protection. The council including chief Councilor of Kinbidhoo was also consulted on the design aspects of the harbor and discussions on issues regarding the design was listed.
The council members stated that the design was sent to them by the ministry and was aware of the design components. The council members stated that the opening at the western side of the harbor is too wide. According to the members of the meeting the sediment movement especially the sand bank at the western side of the proposed harbor area moves seasonally and if the
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opening is large will spill in to the basin. Therefore the council members and participants of the meeting stated that either the opening should be narrowed or low crested rock line should be run across the opening to minimize flow of sediment inside the basin.
The members of the meeting also inquired whether maintenance dredging of the existing entrance to deep lagoon is included in the scope of work. The EIA consultants informed that this component will be discussed during consultation with MHE.
The EIA consultant inquired about possible location for temporary set up for the contractor. The council members stated that existing open area near the T jetty can be used by the contractor.
The EIA consultants inquired about the ownership of coconut palms at the T jetty area and whether compensation for the coconut palms has been provided. The council members stated that coconut palms at the area belong to the island office and no compensation is required.
The EIA consultants also inquired about existing usage of the T jetty and difficulties faced. The members of the meeting stated that during SW monsoon especially if wind is north westerly or westerly; the T jetty area is very turbid. According to the members of the meeting; one vessel has already been damaged during T jetty usage. Also the council members stated that significant damages were received to the structure over the years and currently only a small portion of the quay area is used; the rest is subsided or submerged.
The members of the meeting also stated that currents around the island is south to northwards to western and eastern side; while all the flotsam garbage is observed converging near the northern side of the island (receiving from western and eastern side).
The EIA consultants also inquired about future land use at harbor area. The council members stated that land use plan is not yet formulated. Although this may be the case, land for ferry terminal has already been demarcated. The council stated that harbor management will be the responsibility of the island council; therefore harbor usage regulations will be formulated.
Overall the island community was in favor of the design of the harbor apart from the width of the western side opening.
c) Consultation with MHE Construction and Infrastructure Department (CID) of MHE was consulted in regards to the harbor development project at Kinbidhoo. CID informed that EIA consultant can propose a low crested obstruction at the opening at western side. But due to budgetary constraints this component may not be carried out.
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In regard to maintenance dredging of existing entrance channel to deep lagoon from inter atoll waters; CID stated that this component is not included in the scope of the project.
d) Outcome of the consultation meetings Major outcome of the consultation meetings is issue of opening at the western side and maintenance dredging at the existing entrance to deep lagoon.
CID requested for EIA consultant to propose mitigation for the issue Maintenance dredging at existing entrance is not included in the EIA or project scope. Although this maybe the case environmental impact due to maintenance dredging to be included in the report
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6. Existing Environment
a) General Setting The Maldives archipelago consists of a double chain of coral atolls, 80 – 120km wide stretching 860km from latitude 7° 6’ 30” N to 0° 41’ 48” S and longitude 72° 32’ 30 E to 73° 45’ 54” E (Ministry of Construction and Public Works, 1999). The double chain of the Maldivian atolls lies on the parallel submarine ridges in the central part of Indian Ocean known as Laccadive-Chagos ridge. The archipelago comprises 25 natural atolls (Naseer, 2004) grouped into 20 administrative units (see Figure 4). The atolls are separated by east-west running deeper channels. The atolls vary in shape from circular and oval to elliptical. The atolls contain 1190 islands, of which only 198 are inhabited. The total reef area of Maldives is 4,493.85km2 while the total land area is 227.45km2 (Naseer, 2004). Approximately 80% of Maldivian land area is less than 1m above mean sea level.
The characteristics of reefs and coral islands of the Maldives vary considerably from north to south. The atolls to the north are broad banks discontinuously fringed by reefs with small coral islands and with numerous patch reefs and faros (the word faros is derived from the Maldivian word “faru”) in the lagoon. To the south the depth of atoll lagoon increases, faros and patch reefs are rare in the lagoon, the continuity of the atoll rim is greater and a large proportion of the perimeter of the atolls is occupied by islands (Woodroffe, 1992). The islands have shallow reef flats on their seaward side, some with shingle ramparts at the seaward limit of the reef flat. The islands and the shingle ramparts owe their origin to the deposition of shingle or coral debris during storms. A number of islands can be found on a single reef. These islands may be separated by shallow passages that run across the reef flat. The width of some of these passages could be less than 100m while some passages are over a few hundred meters wide.
Figure 4 Geographic location of Maldives in Indian Ocean
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b) Geographical location and general setting of Th. Kinbidhoo Kinbidhoo is located in Kolhumadulu (Thaa) atoll, 228 km from Male’. Figure 5 shows the geographic location of Kolhumadulu Atoll, location of Kinbidhoo and a satellite image of Kinbidhoo. Nearest inhabited island is Veymandoo (3.89 km on the north eastern side). In terms of geographic coordinates, it is located at 2° 10' N and 73° 3' E. Nearest island is Kudakinbidhoo (uninhabited), approximately 0.54 km south west of Kinbidhoo. The reef system which hosts the island of Kinbidhoo is approximately 24.6 km long and 2.4 km at the widest area while it is 2.0 km wide at Kinbidhoo area.
Figure 5 Geographic location of Kolhumadulu atoll in Maldives chain of atolls (A), Map of Kolhumadulu Atoll showing the location of Kinbidhoo (B) and satellite image of Kinbidhoo (C)
c) Climate and Oceanography i) Wind climate
Wind climate in the Maldives is dominated by the Indian monsoon climate; South West (SW) monsoon and North East (NE) monsoon. The Indian monsoon system is one of the major climate systems of the world, impacting large portions of both Africa and Asia (Overpeck et, al., 1996). The monsoon climate is driven by the atmospheric pressure differences that arise as a result of rapid warming or cooling of the Tibetan Plateau relative to the Indian Ocean (Hastenrath 1991; Fein and Stephens 1987). During the summer of northern hemisphere the Tibetan Plateau warms rapidly relative to the Indian Ocean which results in an atmospheric pressure gradient (Low pressure over Asia and high pressure over the Indian Ocean) between the Asian landmass and the Indian ocean, which drives the prevailing wind from south to westerly directions. The period during which prevailing winds are from south to westerly direction is known as the SW monsoon. In the winter of northern hemisphere the continent cools relative to
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the ocean. This reverses the pressure gradient (low pressure over the Indian Ocean high pressure over the Asian landmass) and the prevailing winds become northeasterly. The period during which prevailing winds are from northeasterly directions is known as NE monsoon. The transitions from NE to SW monsoon and vice versa are distinctly different from SW or NE monsoon. During these transition periods the wind becomes more variable.
The SW monsoon lasts between May and September while the NE monsoon lasts between December and February. The period between March and April is the transition period from the NE monsoon to SW monsoon known locally as the Hulhangu Halha, while the transition period from SW monsoon to NE monsoon is known as Iruvai Halha. Iruvai halha lasts from October to November (Table 2). The SW monsoon is generally rough and wetter than the NE monsoon. Storms and gales are infrequent in this part of the world and cyclones do not reach as far south as the Maldivian archipelago (Ministry of Construction and Public Works, 1999).
Table 2 Four seasons experienced in the Maldives
Season Month December NE-Monsoon January February Transition Period 1 March April May June SW-Monsoon July August September Transition Period 2 October November
An analysis of the wind climate was done using the daily averaged wind data for 1995 to 2010 from the nearest Kadhdhoo Meteorological Station as there was a lack of on-site data for wind parameters. In this analysis, wind rose diagrams based on wind speed and direction was produced.
Wind rose plots (see Figure 6) shows that winds from SSW to WNW are dominant wind direction in the SW monsoon. And in NE monsoon, N to ENE is the prevailing wind direction. Rest of the winds throughout the year is roughly scattered (less than 30% of a year).These prevailing wind directions in both easterly and westerly winds are the directions in which the
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strongest wind blows. Climatology shows that wind speeds are 5-15 knots during the SW monsoon.
Figure 6 Summary wind data indicating the wind speed, direction and percentage of occurrence of wind from different directions for the four seasons (wind data between 1995 to 2010 –Kadhoo wind data set)
ii) Rainfall
Maldives experiences rainfall throughout the year. However the renowned season for rainfall is the SW monsoon. The monsoon rainfall is brought by the passage of the Inter-tropical Convergence Zone (ITCZ) over the country. On average, Maldives receives an annual rainfall of more than 2500 mm a year.
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Figure 7 Eight year (1994-2001) climatology of rainfall for all the stations of Maldives
iii) Tide
Tide in the Maldives is characterized by sinusoidal oscillation containing two main cycles per day (semidiurnal tide) combined with a one cycle per day (diurnal tide). The combination of these two tides is referred as a mixed tide. Analyses of tides involve the study of harmonics which represents the period of oscillation of the celestial forcing that give rise to that harmonic. Therefore, harmonic analysis of the tides breaks down the complex tidal oscillations into a collection of simple sinusoids, which can be used to predict the tide at the site of tidal data collection.
The closest tide station is in Male’ Atoll (approximately 228km). While there are no permanent tide stations established in Hadhdhunmathi Atoll some data was collected during the formulation of the EIA for City hotel development at L. Gan (approximately 57km from Kinbidhoo), and this data was used.
The tide was compared with the predicted tide provided by the University of Hawaii as this is a standard used for Maldives. The comparison indicates that the measured tide is very good and can be used for engineering purposes with high confidence. Comparisons of the tides are shown in Figures 8.
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0.5
0.3
0.1 Observed ‐0.1 Predicted ‐0.3
Height relative to MSL (m) MSL to relative Height ‐0.5 6/17/2010 0:00 6/18/2010 12:00 6/20/2010 0:00 6/21/2010 12:00 6/23/2010 0:00
Time
Figure 8 Comparison of the measured and predicted tide for the wave gauge 13.
Harmonic analysis of the tide
Tidal motion can be represented as a sum of series of several harmonics which is known as the tidal constituents. Each harmonic has its own frequency of oscillation. The harmonic analysis assumes that the tide and any location comprises of multiple tidal constituents. There are several tidal constituents of these the most significant are formed by the gravitational attraction between the earth, moon and the sun. Table 3 shows the principle tidal constituents and their respective period of occurrences. The subscripts 1 and 2 represent the types diurnal and semi-diurnal respectively. Of these constituents, K1, O1, P1, Q1, M2, N2, S2, and K2 composes a significant part of a tidal signal.
Table 3 Principle tidal constituents (Defant 1961)
Name Constituent Period (solar hr)
Principal lunar M2 12.42
Principal solar S2 12
Larger lunar elliptic N2 12.66
Luni-solar semidiurnal K2 11.97
Larger solar elliptic T2 12.01
Smaller solar elliptic L2 12.19
Lunar elliptic second order 2N2 12.91
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Larger lunar evectional ν2 12.63
Smaller lunar evectional λ2 12.22
Variational μ2 12.87
Luni-solar diurnal K1 23.93
Principal lunar diurnal O1 25.82
Principal solar diurnal P1 24.07
Larger lunar elliptic Q1 26.87
Smaller lunar elliptic M1 24.84
Small lunar elliptic J1 23.1
Lunar fortnightly Mf 327.86
Lunar monthly Mm 661.3
Solar semiannual Ssa 2191.43
The constituents K1, O1, M2 and S2 are used to classify the tides into four categories. The following ratio is used for the classification.