DOCSLIB.ORG

Assessment of Impact of Different Implementation Schemes for the Proposed Sandwip-Urir Char-Noakhali Cross-Dam on Regional Hydro Morphological Regime

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Assessment of Impact of Different Implementation Schemes for the Proposed Sandwip-Urir Char-Noakhali Cross-Dam on Regional Hydro Morphological Regime ASSESSMENT OF IMPACT OF DIFFERENT IMPLEMENTATION SCHEMES FOR THE PROPOSED SANDWIP-URIR CHAR-NOAKHALI CROSS-DAM ON REGIONAL HYDRO MORPHOLOGICAL REGIME MD. MONOWAR-UL HAQ INSTITUTE OF WATER AND FLOOD MANAGEMENT BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY MARCH 2019 ASSESSMENT OF IMPACT OF DIFFERENT IMPLEMENTATION SCHEMES FOR THE PROPOSED SANDWIP-URIR CHAR-NOAKHALI CROSS-DAM ON REGIONAL HYDRO MORPHOLOGICAL REGIME A Thesis Submitted By MD. MONOWAR-UL HAQ In partial fulfillment of the requirement for the degree of MASTER OF SCIENCE IN WATER RESOURCES DEVELOPMENT INSTITUTE OF WATER AND FLOOD MANAGEMENT BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY MARCH 2019 Dedicated to My Beloved Family iii TABLE OF CONTENTS TABLE OF CONTENTS .......................................................................................................... iv LIST OF FIGURES ................................................................................................................. vii LIST OF TABLES ..................................................................................................................... x LIST OF NOTATIONS ............................................................................................................ xi LIST OF ABBREVIATIONS .................................................................................................. xii ACKNOWLEDGEMENT ..................................................................................................... xiii ABSTRACT ............................................................................................................................ xiv CHAPTER 1 INTRODUCTION ............................................................................................... 1 1.1 Study Background ....................................................................................................... 1 1.2 Objectives .................................................................................................................... 2 1.3 Scope of the Study....................................................................................................... 3 1.4 Outline of Thesis ......................................................................................................... 4 CHAPTER 2 LITERATURE REVIEW .................................................................................... 5 2.1 Flow and Sediment Dynamics..................................................................................... 5 2.2 Residual Flow .............................................................................................................. 6 2.3 Tidal Asymmetry......................................................................................................... 7 2.4 Historical Development of the Meghna Estuary ......................................................... 8 2.5 Sediment Morphology in the Meghna Estuary ......................................................... 13 2.6 Sediment Influx in the Meghna Estuary .................................................................... 13 2.7 Sediment Dynamics in the Meghna Estuary ............................................................. 16 2.8 Land Reclamation in the Meghna Estuary ................................................................ 19 2.9 Proposed Sandwip-Urir Char-Noakhali Cross-dam .................................................. 23 2.10 Summarization .......................................................................................................... 26 CHAPTER 3 METHODOLOGY ............................................................................................ 28 3.1 Study Approach ......................................................................................................... 28 iv 3.2 Hydrodynamic Modeling Exercise............................................................................ 28 3.3 Model Description ..................................................................................................... 31 3.4 Model Domain........................................................................................................... 32 3.5 Bathymetry Data ....................................................................................................... 33 3.6 Boundary Conditions................................................................................................. 35 3.7 Asymmetry Measurements ........................................................................................ 36 3.7.1 Wave Asymmetry Properties ............................................................................. 37 3.7.2 Flood/ Ebb Dominance ...................................................................................... 38 3.7.3 Slack Water Durations ....................................................................................... 39 3.8 Tidal Asymmetry in Dam Locations ......................................................................... 39 CHAPTER 4 RESULTS AND DISCUSSION ........................................................................ 42 4.1 Model Calibration and Validation ............................................................................. 42 4.2 Simulation Cases ....................................................................................................... 46 4.3 Flow Regime ............................................................................................................. 49 4.4 Residual Flow Patterns .............................................................................................. 58 4.5 Wave Asymmetry ...................................................................................................... 61 4.5.1 Asymmetry 1 ...................................................................................................... 63 4.5.2 Asymmetry 2 ...................................................................................................... 63 4.6 Flood/ Ebb Dominance.............................................................................................. 65 4.6.1 Vertical (WL) Dominance ................................................................................. 67 4.6.2 Horizontal (Velocity) Dominance...................................................................... 67 4.7 Slack Water Duration ................................................................................................ 69 4.7.1 Slack Before Flood (SBF) .................................................................................. 71 4.7.2 Slack Before Ebb (SBE) .................................................................................... 71 4.8 Sediment Dynamics................................................................................................... 72 4.9 Discussion ................................................................................................................. 85 CHAPTER 5 CONCLUSIONS AND RECOMMENDATIONS ............................................ 88 v 5.1 Conclusions ............................................................................................................... 88 5.2 Recommendations for Future Studies ....................................................................... 90 REFERENCES ........................................................................................................................ 92 vi LIST OF FIGURES Figure 2.1. Temporal development of the Meghna Estuary (Sarker et al., 2011). .................... 9 Figure 2.2. Map indicative of land gains within Noakhali Region. Left map is based on Rennel’s survey and right map is based on survey done during LRP (Barua, 1997). ............. 12 Figure 2.3. Historical imagery showing land gains in the Meghna Estuary. ........................... 12 Figure 2.4. Trend lines of sediment flux along the Ganges and Brahmaputra during different time periods using secondary data, BWDB and FAP data (Rahman et al., 2018). ................. 16 Figure 2.5. Direction and relative importance of river and tidal flows in influencing sediment discharge (Sarker et al., 2011; based on Sokolewicz, & Louters, 2007). ................................ 19 Figure 2.6. Placement and land gains in the upper estuarine regions due to these historical cross-dams (source: BWDB). ................................................................................................... 22 Figure 2.7. Map of the Meghna Estuary from the MES (MoWR, 2001). ................................ 23 Figure 3.2. Bathymetry of the model computation domain. .................................................... 34 Figure 3.3. Bathymetry modifications to incorporate cross-dams into the model domain. ..... 35 Figure 3.4. Average monthly variation of water and suspended sediment discharge of the combined Ganges–Brahmaputra–Meghna River system (Islam et al., 2002). ........................ 36 Figure 3.5. Schematic diagram of tidal water level profile illustrating the definitions of wave asymmetry (Hussain et al., 2013). ........................................................................................... 38 Figure 3.6. Schematic diagram of tidal velocity profile illustrating the definitions of tide dominance asymmetry and asymmetry due to slack water durations (Hussain and Tajima, 2019). ....................................................................................................................................... 39 Figure 3.7. Plot of measured water level, velocity and turbidity along the northern channel of Urir Char Island (Hussain
Load more

Recommended publications
  • Sediment Dispersal Process and Its Management in the Meghna
    Sediment Problems and Sediment Management in Asian River Basins 203 (Proceedings of the Workshop held at Hyderabad, India, September 2009). IAHS Publ. 349, 2011. Sediment dispersal processes and management in coping with climate change in the Meghna Estuary, Bangladesh MAMINUL HAQUE SARKER, JAKIA AKTER, MD RUKNUL FERDOUS & FAHMIDA NOOR Center for Environmental and Geographic Information Services (CEGIS), House no.6, Road no. 23/C, Gulshan-1, Dhaka-1212, Bangladesh [email protected] Abstract Due to flat terrain and dense population, the Bengal Delta is highly vulnerable to sea level rise. At present the delta building process is active in the Meghna Estuary. Information on sediment dispersal processes in the estuary and their response to different exogenic and anthropogenic forces is an important requirement for managing the sediment and developing adaptive measures to counter the potential impact of climate change. Historical maps, satellite images and tidal water level data were analysed and the response of the Meghna Estuary to extreme events, e.g. the 1950 Assam earthquake, as well as anthropogenic interventions, was assessed. The issue of sediment management was addressed, based on an understanding of the response of the estuary to the extreme natural event and anthropogenic interventions, along with an assessment of the response of the estuary to sea level rise. Among other interventions, emphasis has been directed to promoting vertical accretion by injecting sediment into polders. Key words Bengal delta; Meghna Estuary; sea level rise; sediment dispersal processes; vertical accretion; sediment injection INTRODUCTION Deltas are a large accumulation of both fluvial and marine sediments which have infilled river mouths and extended onto the continental shelf (Fookes et al., 2007).
    [Show full text]
  • Susceptibility to Changes in Coastal Land Dynamics in Bangladesh
    Susceptibility to Changes in Coastal Land Dynamics in Bangladesh Asib Ahmed Submitted in accordance with the requirements for the degree of Doctor of Philosophy The University of Leeds Faculty of Earth and Environment School of Geography November 2018 i The candidate declares that the work is original and solely accomplished by him. The contributions of individual supervisors are clearly indicated below. The candidate confirms that appropriate credits have been given to the authors where references have been cited from literature pertinent to the study. The work in chapter 2 of the thesis has appeared in publication as follows: Where is the coast? Monitoring coastal land dynamics in Bangladesh: An integrated management approach using GIS and remote sensing techniques. Ocean and Coastal Management (2018) 151, 10-24. Asib Ahmed, Frances Drake, Rizwan Nawaz, Clare Woulds. Contributions: Asib Ahmed (AA) was responsible for literature review, collection, processing and analysis of Landsat satellite images, collecting data on management and policy issues, preparing figures and writing-up the draft paper. Frances Drake (FD) made significant contribution to identify site-specific factors of land dynamics in the study area and policy and management aspects where Rizwan Nawaz (RN) provided guidelines on the appropriateness of the satellite images. Clare Woulds (CW) made significant efforts on the structure of the paper and recommendations for further works. All authors provided valuable comments on the draft paper and made efforts to prepare the paper as final. The work in chapter 3 of the thesis has appeared in publication as follows: Modelling land susceptibility to erosion in the coastal area of Bangladesh: A geospatial approach.
    [Show full text]
  • Cyclone Disaster Vulnerability and Response Experiences in Coastal
    Cyclone disaster vulnerability and response experiences in coastal Bangladesh Edris Alam Assistant Professor and Disaster and Development Centre Affiliate, Department of Geography and Environmental Studies, University of Chittagong, Bangladesh and Andrew E. Collins Reader in Disaster and Development, Disaster and Development Centre, School of Applied Sciences, Northumbria University, United Kingdom For generations, cyclones and tidal surges have frequently devastated lives and property in coastal and island Bangladesh. This study explores vulnerability to cyclone hazards using first-hand coping recollections from prior to, during and after these events. Qualitative field data suggest that, beyond extreme cyclone forces, localised vulnerability is defined in terms of response processes, infrastructure, socially uneven exposure, settlement development patterns, and livelihoods. Prior to cyclones, religious activities increase and people try to save food and valuable possessions. Those in dispersed settlements who fail to reach cyclone shelters take refuge in thatched-roof houses and big-branch trees. However, women and children are affected more despite the modification of traditional hierarchies during cyclone periods. Instinctive survival strategies and intra-community cooperation improve coping post cyclone. This study recommends that disaster reduction programmes encourage cyclone mitigation while being aware of localised realities, endogenous risk analyses, and coping and adaptation of affected communities (as active survivors rather than helpless victims). Keywords: coastal and island people of Bangladesh, coping, cyclone vulnerability, local response Introduction With the effects of natural hazards rising in terms of loss of life and injuries in poorer nations (ISDR, 2002; World Bank, 2005; CRED, 2007), institutional disaster reduction approaches (ISDR, 2004; UNDP, 2004; DFID, 2005) and approaches adaptable to individual social and livelihood experiences are required.
    [Show full text]
  • Factor Analysis of Water-Related Disasters in Bangladesh
    ISSN 0386－5878 Technical Note of PWRI No.4068 Factor Analysis of Water-related Disasters in Bangladesh June 2007 The International Centre for Water Hazard and Risk Management PUBLIC WORKS RESEARCH INSTITUTE 1-6, Minamihara Tukuba-Shi, Ibaraki-Ken, 305-8516 Copyright ○C (2007) by P.W.R.I. All rights reserved. No part of this book may be reproduced by any means, nor transmitted, nor translated into a machine language without the written permission of the Chief Executive of P.W.R.I. この報告書は、独立行政法人土木研究所理事長の承認を得て刊行したものであ る。したがって、本報告書の全部又は一部の転載、複製は、独立行政法人土木研 究所理事長の文書による承認を得ずしてこれを行ってはならない。 Technical Note of PWRI No.4068 Factor Analysis of Water-related Disasters in Bangladesh by Junichi YOSHITANI Norimichi TAKEMOTO Tarek MERABTENE The International Centre for Water Hazard and Risk Managemant Synopsis: Vulnerability to disaster differs considerably depending on natural exposure to hazards and social conditions of countries affected. Therefore, it is important to take practical disaster mitigating measures which meet the local vulnerability conditions of the region. Designating Bangladesh as a research zone, this research aims to propose measures for strengthening the disaster mitigating system tailored to the region starting from identifying the characteristics of the disaster risk threatening the country. To this end, we identified the country’s natural and social characteristics first, and then analyzed the risk challenges and their background as the cause to create and expand the water-related disasters. Furthermore, we also analyzed the system
    [Show full text]
  • COASTAL DEVELOPMENT STRATEGY ( Approved at the 2Nd Meeting of the Inter-Ministerial Steering Committee on ICZMP Held on February 13, 2006 )
    Ministry of Water Resources Government of the People’s Republic of Bangladesh COASTAL DEVELOPMENT STRATEGY ( Approved at the 2nd meeting of the Inter-Ministerial Steering Committee on ICZMP held on February 13, 2006 ) Water Resources Planning Organization February 2006 PREFACE The coastal zone of Bangladesh is often perceived as a zone of multiple vulnerabilities. But it has much potentials and opportunities. Moreover, it contains several important and critical ecosystems. By harnessing and exploiting its opportunities in systematic and coordinated way, the coastal zone can make a substantial contribution to achieve the national goals of accelerated poverty reduction and economic growth. The need for an area specific program in coastal Bangladesh was recognized in a number of earlier initiatives and the policies and programs of different government agencies. Integrated Coastal Zone Management Plan (ICZMP) project was implemented by Water Resources Planning Organization. One of the key outputs of the project is the Coastal Zone Policy (CZPo) which was approved by the government on 17 January 2005. The policy provides the directives and the framework for the development and implementation of integrated coastal zone management plan. It also gives direction for management of the coastal development process. The Coastal Development Strategy (CDS) focuses on the implementation of the coastal zone policy. The CDS was approved at the second meeting of the Inter-Ministerial Steering Committee on ICZMP held on 13 February 2006. The distinctive development opportunities of the coastal zone are considered as instrumental in reducing vulnerability and poverty of coastal communities. This strategy is an attempt to unlock the potentials of the coastal zone along with strategies to mitigate natural and man- made hazards and to preserve, restore and enhance coastal ecosystems.
    [Show full text]
  • Evsjv‡`K †M‡RU
    †iwR÷vW© bs wW G-1 evsjv‡`k †M‡RU AwZwi³ msL¨v KZ…©c¶ KZ…©K cÖKvwkZ eyaevi, b‡f¤^i 1, 2017 MYcÖRvZš¿x evsjv‡`k miKvi cwiKíbv Kwgkb ‡fŠZ AeKvVv‡gv wefvM moK cwienb DBs cÖÁvcb ZvwiLt 19 A‡±vei 2017 moK cwienb I gnvmoK wefv‡Mi AvIZvaxb moK I Rbc_ (mIR) Awa`ßi Ges ¯’vbxq miKvi wefv‡Mi AvIZvaxb ¯’vbxq miKvi cÖ‡KŠkj Awa`ßi (GjwRBwW)-Gi Kv‡Ri g‡a¨ ˆØZZv cwinvic~e©K †`‡k myôz moK †bUIqvK© M‡o †Zvjvi j‡ÿ¨ miKvi KZ©„K Aby‡gvw`Z †kÖYxweb¨vm I bxwZgvjv Abyhvqx mIR Awa`ßi Ges GjwRBwWÕi moKmg~‡ni mgwšZ^ ZvwjKv 11-02-2004 Zvwi‡L evsjv‡`k †M‡R‡U cÖKvwkZ nq| cieZ©x‡Z 12 Rby 2006 Zvwi‡L GjwRBwWÕi AvIZvaxb Dc‡Rjv I BDwbqb moK Ges ¯’vbxq miKvi cÖwZôvb (GjwRAvB) Gi AvIZvaxb MÖvg moKmg~‡ni Avjv`v ZvwjKv evsjv‡`k †M‡R‡U cÖKvwkZ nq| GjwRBwW Ges mIR Awa`߇ii Aaxb moKmg~‡ni gvwjKvbvi ˆØZZv cwinv‡ii j‡ÿ¨ MwVZ ÕmoKmg~‡ni cybt‡kYÖ xweb¨vm msµvšÍ ÷vwÛs KwgwUÕi 02 b‡f¤^i 2014 Zvwi‡Li mfvq mIR Gi gvwjKvbvaxb moK ZvwjKv nvjbvMv` Kiv nq Ges †gvU 876wU mo‡Ki ZvwjKv P‚ovšÍ Kiv nq| MZ 18 †deªæqvix 2015 Zvwi‡L Zv †M‡R‡U cybtcÖKvk Kiv nq| (14237) g~j¨ : UvKv 172.00 14238 evsjv‡`k †M‡RU, AwZwi³, b‡f¤^i 1, 2017 ÕmoKmg~‡ni cybt‡kªYxweb¨vm msµvš Í ÷vwÛs KwgwUÕi 02 b‡f¤^i 2014 Zvwi‡Li mfvq wm×vš Í M„nxZ nq †h ÕmIR Gi gvwjKvbvaxb mo‡Ki †M‡RU cÖKvwkZ nIqvi ci GjwRBwWÕi moKmg~‡ni ZvwjKv nvjbvMv` K‡i Zv †M‡RU AvKv‡i cÖKvk Ki‡Z n‡eÕ| G †cÖwÿ‡Z 11 †m‡Þ¤^i 2017 Zvwi‡L AbywôZ AvšÍtgš¿Yvjq KwgwUi mfvq GjwRBwW I GjwRAvB Gi nvjbvMv`K…Z ZvwjKv cybtch©v‡jvPbvc~e©K P‚ovš Í Kiv nq (cwiwkó-K) hv, gvbbxq cwiKíbv gš¿x KZ©„K Aby‡gvw`Z| G ZvwjKvq 4,781 wU Dc‡Rjv moK (ˆ`N©¨ 37,519.49 wK:wg:), 8,023
    [Show full text]
  • World Bank Document
    Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Table of Contents Table of Contents ....................................................................................................................... i List of Tables .............................................................................................................................. v List of Figures .......................................................................................................................... vii Abbreviation and Acronyms ................................................................................................ ix Executive Summary .............................................................................................................. xiii 1. Introduction ....................................................................................................................... 1 1.1. Background .......................................................................................................... 1 1.2. Rationale ............................................................................................................... 1 1.3. Objectives ............................................................................................................. 3 1.4. Past initiatives of Greenbelt .............................................................................. 3 1.5. Overall Approach ................................................................................................
    [Show full text]
  • Progress Report No 3 January – December 2020
    CDSP IV Progress Report No 3 January – December 2020 Char Development and Settlement Project Bridging (Additional Finance) Phase IV Bangladesh Progress Report No 3 January – December 2020 February 2021 Government of Bangladesh / IFAD / Government of the Netherlands Implementing Government Agencies: − Bangladesh Water Development Board (BWDB) − Ministry of Land (MoL) − Local Government Engineering Department (LGED) − Department of Public Health Engineering (DPHE) − Forest Department (FD) This document is issued for the party which commissioned it and for specific purposes connected with the above-captioned project only. It should not be relied upon by any other party or used for any other purpose. We accept no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties. This document contains confidential information and proprietary intellectual property. It should not be shown to other parties without consent from us and from the party which commissioned it. i CDSP IV Progress Report No 3 January – December 2020 Contents 1. Introduction 2. Implementation of Activities 3. Achievement of Results 4. Project Management 5. Lessons Learned and Challenges 6. Sustainability 7. Cross-Cutting Issues 8. Integrity Issues 9. Efficient Use of Resources 10. Risk Update ANNEXES: ANNEX A: Map of Project Area ANNEX B: Technical Assistance Team Staffing ANNEX C: Revised and Updated Logframe ANNEX D: Progress against Activity Matrix ANNEX E: Annual Financial Summary Table ANNEX F: Financial Progress Tables, January to June ANNEX G: Financial Progress Tables, July to December ANNEX H: Photographs ii CDSP IV Progress Report No 3 January – December 2020 1.
    [Show full text]
  • Bangladesh Updated For
    REQUEST FOR PROJECT/PROGRAMME FUNDING FROM THE ADAPTATION FUND The annexed form should be completed and transmitted to the Adaptation Fund Board Secretariat by email or fax. Please type in the responses using the template provided. The instructions attached to the form provide guidance to filling out the template. Please note that a project/programme must be fully prepared (i.e., fully appraised for feasibility) when the request is submitted. The final project/programme document resulting from the appraisal process should be attached to this request for funding. Complete documentation should be sent to: The Adaptation Fund Board Secretariat 1818 H Street NW MSN P4-400 Washington, D.C., 20433 U.S.A Fax: +1 (202) 522-3240/5 Email: [email protected] 1 PROJECT/PROGRAMME PROPOSAL TO THE ADAPTATION FUND PART I: PROJECT/PROGRAMME INFORMATION Project/Programme Category: Regular project Country/ies: Bangladesh Title of Project/Programme: Adaptation Initiative for Climate Vulnerable Offshore Small Islands and Riverine Charland in Bangladesh Type of Implementing Entity: MIE Implementing Entity: United Nations Development Programme Executing Entity/ies: Department of Environment, Ministry of Environment, Forest and Climate Change. Amount of Financing Requested: US$ 9,995,369 Project summary Bangladesh has a low-lying topography extremely exposed to sea level rise (SLR), cyclones, tidal surges, salinity intrusion, erratic rainfall, drought and floods, causing it to be one of the world’s most vulnerable countries to climate change. The vulnerable communities who live on chars — small alluvial islands in rivers and the Bay of Bengal are particularly at risk from climate change. These communities have already experienced a number of climate change impacts including frequent tidal surges, increasingly intense cyclones and salt water intrusion into fresh water and soil.
    [Show full text]
  • CDSP IV Progress Report No 10 December 2015
    Char Development and Settlement Project Phase IV Bangladesh Progress Report No 10 July – December 2015 March 2016 Government of Bangladesh / IFAD / Government of the Netherlands Implementing Government Agencies: Bangladesh Water Development Board (BWDB) Ministry of Land (MoL) Local Government Engineering Department (LGED) Department of Public Health Engineering (DPHE) Department of Agriculture Extension (DAE) Forest Department (FD) and NGOs BETS Euroconsult Mott MacDonald Socioconsult BETS Euroconsult Mott MacDonald Socioconsult CDSP IV Progress Report No 10 July – December 2015 Content Chapter Title Page List of Abbreviations/ Glossary iv 1. Introduction 1 2. Objectives of CDSP IV 2 3. Project areas and population 3 3.1 Introduction ________________________________________________________________ 3 3.2 Char Nangulia, Noler Char, Caring Char __________________________________________ 3 3.3 Urir Char ___________________________________________________________________ 4 3.4 Char Ziauddin _______________________________________________________________ 4 4. Implementation status per component 5 4.1 Introduction ________________________________________________________________ 5 4.2 Protection from climate change _________________________________________________ 5 4.2.1 Construction of water management infrastructure by BWDB __________________________ 5 4.2.2 Social forestry by Forest Department ____________________________________________ 8 4.3 Climate-resilient infrastructure and water supply and sanitation ________________________
    [Show full text]
  • Where Is the Coast? Monitoring Coastal Land Dynamics in Bangladesh: an Integrated Management Approach Using GIS and Remote Sensing Techniques
    This is a repository copy of Where is the coast? Monitoring coastal land dynamics in Bangladesh: An integrated management approach using GIS and remote sensing techniques. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/124332/ Version: Accepted Version Article: Ahmed, A, Drake, F, Nawaz, N et al. (1 more author) (2018) Where is the coast? Monitoring coastal land dynamics in Bangladesh: An integrated management approach using GIS and remote sensing techniques. Ocean and Coastal Management, 151. pp. 10-24. ISSN 0964-5691 https://doi.org/10.1016/j.ocecoaman.2017.10.030 (c) 2017 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ Reuse This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) licence. This licence only allows you to download this work and share it with others as long as you credit the authors, but you can’t change the article in any way or use it commercially. More information and the full terms of the licence here: https://creativecommons.org/licenses/ Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing [email protected] including the URL of the record and the reason for the withdrawal request. [email protected] https://eprints.whiterose.ac.uk/ Where is the coast? Monitoring coastal land dynamics in Bangladesh: An integrated management approach using GIS and remote sensing techniques Asib Ahmed a, * Frances Drake a Rizwan Nawaz b Clare Woulds a a School of Geography, University of Leeds, LS2 9JT, UK b Department of Civil and Structural Engineering, The University of Sheffield, S10 2TN, UK [email protected] (A.
    [Show full text]
  • Coastal Morphological Changes: Assessing Long-Term Ecological Transformations Across the Northern Bay of Bengal
    Environmental Challenges 1 (2020) 100001 Contents lists available at ScienceDirect Environmental Challenges journal homepage: www.elsevier.com/locate/envc Coastal morphological changes: Assessing long-term ecological transformations across the northern Bay of Bengal Kabir Uddin a,∗, Nishanta Khanal a,b, Sunita Chaudhary a, Sajana Maharjan a, Rajesh Bahadur Thapa a a International Centre for Integrated Mountain Development, Kathmandu 44600, Nepal b Spatial Informatics Group, 2529 Yolanda Ct. Pleasanton, CA 94566, USA a r t i c l e i n f o a b s t r a c t Keywords: Major rivers from the Himalayas carry a high volume of sedimentation, and deposit it across the Bay of Bengal Remote sensing in Bangladesh. This has caused significant changes in the morphology of the bay, including the development of Landsat islands across the bay area. However, few studies have been carried out on the morphological changes, especially GEE the development of new islands across the northern Bay of Bengal. This study, therefore, aimed to assess the Monitoring coastal morphological changes and ecological succession of the newly formed islands of the bay area. We used Island formulation Ecological succession state of the art cloud computing technologies, using the Google Earth Engine (GEE) platform. Publicly available Coastal morphology annual composites of Landsat 8, Landsat ETM+, and TM data from 1989 to 2018 were used for analysis. The findings showed significant changes in the morphology of the coastal area over a period of 30 years. There was a 1.15% increase in land area between 1989 and 2018. New islands were formed across the bay, and a few old islands disappeared between 1989 and 2018.
    [Show full text]