Water Supply and Sanitation Sector Project- Additional Financing Improvement of Gegharkunik Region Settlements Water Supply System
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Initial Environmental Examination July 2014 ARM: Water Supply and Sanitation Sector Project- Additional Financing Improvement of Gegharkunik Region Settlements Water Supply System Prepared by the State Committee Of Water System under the RA Ministry for Territorial Governance for the Asian Development Bank. This initial environmental examination is a document of the borrower. The views expressed herein do not necessarily represent those of ADB's Board of Directors, Management, or staff, and may be preliminary in nature. Your attention is directed to the “terms of use” section of this website. In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area. HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing STATE COMMITTEE OF WATER SYSTEM UNDER THE RA MINISTRY FOR TERRITORIAL GOVERNANCE “ARMWATERSEWERAGE” CJSC ASIAN DEVELOPMENT BANK FUNDED WATER SUPPLY AND SANITATION SECTOR PROJECT - ADDITIONAL FINANCING Date of preparation 06.08.2013 Date of revision 16.07.2014 VI SUBPROJECT L2860-ICB-1-06: IMPROVEMENT OF GEGHARKUNIK REGION SETTLEMENTS WATER SUPPLY SYSTEM INITIAL ENVIRONMENTAL EXAMINATION Yerevan, July, 2014 Subproject VI -Preliminary Design 3 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing STATE COMMITTEE OF WATER SYSTEM UNDER THE RA MINISTRY FOR TERRITORIAL GOVERNANCE “ARMWATERSEWERAGE” CJSC ASIAN DEVELOPMENT BANK FUNDED WATER SUPPLY AND SANITATION SECTOR PROJECT - ADDITIONAL FINANCING Subproject VI IMPROVEMENT OF GEGHARKUNIK REGION WATER SUPPLY SYSTEMS INITIAL ENVIRONMENTAL EXAMINATION (Gavar, Martuni towns and Noratus, Gandzak, Sarukhan, Karmirgyugh, Ltchashen, Chkalovka, Norashen, Ddmashen villages of Gegharkunik region, RA) HGSN Ltd, Director V. Hovasapyan Environmental expert K.Sahakyan Yerevan, July, 2014 Subproject VI -Preliminary Design 4 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing TABLE OF CONTENTS 1.Scope of Work ................................................................................................................ 6 2.Description of the Existing Water Supply and Sewage Systems ............................... 7 3.Geographical Location and Climate of the Settlements ............................................. 7 4. Biodiversity and Specially Protected Areas ............................................................... 9 5.Environmental Impact Assessment ............................................................................ 10 LIST OF APPENDICES Appendix 1. Checklist for Quick Environmental Evaluation ............................................... 11 Appendix 2. Syunik subproject layout ............................................................................... 15 Subproject VI -Preliminary Design 5 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing 1. Scope of Work The aim of this subcomponent of the subproject is to improve the drinking water supply systems of Gavar and Martuni towns and Noratus, Gandzak, Sarukhan, Karmirgyugh, Ltchashen, Chkalovka, Norashen, Ddmashen villages in Gegharkunik region, RA within the framework of the project. The priority is to improve the water supply systems of the settlements. The works carried out for the improvement of the water supply systems of the settlements of Gavar and Martuni towns and the village communities mentioned above include: . Reconstruction or construction of the external conduit with de250-de225 polyethylene pipes, L=9860m; . Construction of de40-de280 polyethylene waterlines, L=190664m in the distribution network; . Construction of water-metering units and entry lines of private houses with de20- 32 polyethylene pipes for 59890 subscribers; . Construction of a total of 7900 water metering wells; . Construction of 69 water supply wells; . Construction of a total of 71 buried valve junctions. The number of population of Gavar and Martuni towns as well as Noratus, Gandzak, Sarukhan, Karmirgyugh, Ltchashen, Chkalovka, Norashen, Ddmashen villages is 77227 people at the time of 01.01.2013; the urban population is 41723 people. The overall number of subscribers is 15762, the village subscribers are 5794 people. The index of annual growth of population is 0.43% according to the published data of “Armenian Demographic Handbook 2012”. As a result of project implementation all the inhabitants of the communities will be provided with drinking quality water and regular water supply. The works foreseen by the subproject cover the rehabilitation works of the existing structures, therefore they will have minimum temporary impact on the natural landscape. During the implementation of the construction works, as required, the asphalt will be bought from specialized asphalt plant which is responsible for taking environmental impact mitigation measures. All asphalt plants function in accordance with RA Environmental legislation. Subproject VI -Preliminary Design 6 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing 2. Description of the Existing Water Supply and Sewage Systems Gavar and Martuni towns as well as Noratus, Gandzak, Sarukhan, Karmirgyugh, Ltchashen, Chkalovka, Norashen villages are served by AWS CJSC and Ddmashen village is served by the community. Among the above mentioned settlements the water supply system of Gavar and Sarukhan settlements is fed from the water springs of “Hatsarat” and “Sarukhan” with 3 groups of DRRs by means of the pumping stations. The water is disinfected in the chlorination plants nearby the catchments. The water supply system of Martuni town is fed from “Tsakqar” and “Hopoyi Var” catchaments by gravity. The water supply of Noratus, Ltchashen, Chkalovka, Norashen communities is implemented from the 32.5km long water conduit of Hatsarat – Sevan Ø500(St) pressure system fed from the springs of “Hatsarat”, to which they are connected at the corresponding points by Ø50(St) pipes. The water supply of Gandzak village is implemented from the 2x500m3 DRRs and deep wells by gravity. The water supply of Karmirgyugh is implemented from the springs of “Sarukhan” by the pumping station and from “Kloyi gyol” by gravity. Ddmashen village is fed from the catchment structures built on the springs, from where the water is given to the distribution network by the DRRs of 2x250m3 capacity. The internal water supply systems in the observed settlements are in an emergency condition, the distribution networks and the DRRs need replacement or construction. Reconstruction works of waterlines, pumping stations, DRRs and water supply wells have been carried out in recent years. In 2013 a project of water supply system improvement was carried out funded by the World Bank, which was aimed at implementing reconstruction works of the distribution network. Gavar town included in the subproject is canalized partially, and Martuni town is canalized completly, the sewage is removed and filled into the treatment plant. The villages are also canalized partially. The sewage is gathered from the settlements, removed and filled into Gavaraget. In the lower districts there are no waste water removal stations, the inhabitants use yard toilets. 3. Geographical Location and Climate of the Settlements Gavar, Martuni towns and Noratus, Gandzak, Sarukhan, Karmirgyugh, Ltchashen, Chkalovka, Norashen, Ddmashen village communities are situated in Gegharkunik Subproject VI -Preliminary Design 7 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing Region. The area of Gegharkunik Region occupies 5348 km2 surface. The regional centre is Gavar town, which is 98 km away from Yerevan. The observed area of Gegharkunik Region represents a depression surrounded with high folded block-mountains and middle height mountains, the inter-mountainous trough of which is occupied by Lake Sevan. The settlements are located 1700-2100m above sea level in the river valley of southern and western shores of Lake Sevan. The climate of the area is terrestrial and is characterized by cold winter, by relatively warm and sunny summer, by wet and changeable spring and autumn. The water surface of Sevan basin influences the climete mildly and promotes the origination of the solar gloss. The average duration of the solar gloss is 2650 hours and the number of not sunny days is 19. The average annual temperature is 5.3 0C. The absolute maximum temperature is +320C, and the absolute minimum is -330C. The minimum temperature reaches up to -400 C (Gavar town). The annual atmospheric percepitation is 400-800mm. In winter there is stable snow layer everywhere. The snow layer of the lake shore lasts 120-130 days, and in high mountainous zones – up to 250 days. The western, south-western and southern winds dominate in the region. The average speed of the wind varies between 3-5 m/sec. From the geomorphologic viewpoint the area is bordered by Geghama mountain range from the West, the volcanic mount shields of Vardenis from the South and Areguni mountain range from the North. The relief is characterized as having strongly dissected mountainous landscape with rocky slopes and coombs of different depth and width. From the geological viewpoint the area is represented by the middle – higher fourth lake sediments and by Eocene andesite porphyrites and tuff-breccias.