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Vayots Dzor Region Settlements Water Supply System

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Vayots Dzor Region Settlements Water Supply System 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 17.10.2013 Date of revision 26.02.2014 Date of approval 18.03.2014 VIII SUBPROJECT L2860-ICB-1-08: IMPROVEMENT OF VAYOTS DZOR REGION SETTLEMENTS WATER SUPPLY SYSTEM INITIAL ENVIRONMENTAL EXAMINATION Yerevan, March, 201 4 STATE COMMITTEE OF WATER SYSTEM UNDER THE RA MINISTRY FOR TERRITORIAL GOVERNANCE “ARMWATERSEWERAGE” CJSC HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing ASIAN DEVELOPMENT BANK FUNDED WATER SUPPLY AND SANITATION SECTOR PROJECT - ADDITIONAL FINANCING Subproject VIII IMPROVEMENT OF VAYOTS DZOR REGION WATER SUPPLY SYSTEMS INITIAL ENVIRONMENTAL EXAMINATION Subproject VII (Vayk, Jermuk towns and Zaritap village of Vayots Dzor region, RA) HGSN Ltd, Director V. Hovasapyan SOS MM Ltd, Director M. Hakobyan Environmental expert K. Sahakyan Subproject VIII 2 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing TABLE OF CONTENTS 1. Scope of Work ................................................................................................................ 4 2. Description of the Existing Water Supply and Sewage Systems ............................ 5 3. Geographical Location and Climate of the Settlements ........................................... 7 4. Biodiversity and Specially Protected Areas ................................................................. 10 4.1. Flora and Fauna ............................................................................................................. 10 4.2. Special protected areas .................................................................................................. 12 5. Environmental Impact Assessment ............................................................................ 13 Appendix 1. Checklist for Quick Environmental Evaluation ........................................................ 14 Appendix 2. Vayotys Dzor subproject layout ............................................................................. 18 Subproject VIII 3 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing 1. Scope of Work The aim of the project subcomponent is to improve the drinking water supply systems of the settlements in Vayots Dzor Region, RA /Jermuk and Vayk towns, Zaritap village/ within the framework of the project. Taking into account the fact, that Vayk and Jermuk towns have central sewage systems, and Zaritap village has a partial sewage system, the priority is given to the improvement of the water supply systems of the mentioned settlements. Studies show, that the proposals of the water supply system improvement of the settlements included in the subproject are based on construction and reconstruction of DRRs, distribution networks of Vayk, Jermuk towns and Zaritap villages. It will result in reduction of leakages, provision of the required water demand and more rational use of water resources. The following work is to be carried out: Vayk t. Construction of DRRs with the capacity of W=2x1000m3, . Construction and reconstruction of Ø500 steel water main coming from “Herher” catchments with de280, de300 polyethylene pipes with approximately 1.40 km length. Construction of DN300 valve junction. Construction of DN1200 simple dissipating basin from steel pipe. Jermuk t. Construction of DRRs with the capacity of W=2x500m3 , . Construction of DRRs, the fence (about 815m) of the sanitary zone of “Jrat” catchments feeding the DRRs (4 ha). Zaritap v. Construction of a chlorination station fed from “Yot Achkani” water springs in the area of r\c DRRs with the capacity of W=2x100m3 . Construction of DRRs and a chlorination station with the capacity of W=2x300m3 fed from “Terter’ water springs in the area of deteriorated r/c DRR with the capacity of W=100m3 (which should be out of operation). Construction of the fences of sanitary zones of catchments - 240m. Repair of water intake wells of catchments-concrete - 9.5m3. The total number of the population in the towns of Vayk, Jermuk and village Zaritap by 01.01.2012 was 5914, from which the urban population is 14314. In the urban communties the total number of the consumers is 3960. The anual population growth, according to “Armenian demographic collection 2007”, is 0.43%. Subproject VIII 4 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing As a result of the project implementation the inhabitants of the communities will be provided by drinking quality water and stable water supply. 2. Description of the Existing Water Supply and Sewage Systems Town Vayk is served by AWS. The water sources of the town are “Herher” catchements. They are situated in the southern parts of Herher village administrative area, distributed in almost 1485 points and occupies about 1.4ha area. The total length of all the branches of catchment underground water gallery is 20m, and the discharge is 180 l/sec. As the water quality in the water springs corresponds to the requirements presented by the state standards to the “Drinking water” (“Sanitary norms and regulations N2-III-A2-1” approved by decree 786 of RA Ministry of Health), so no treatment structures are foreseen, only water disinfection is to be carried out. Water disinfection is carried out in the chlorination station located in the area of the catchments by means of chlorination equipment operating by the vacuum principle. The disinfected water is transmitted to the regulation node in the south-east of Vayk town, from where the distribution network of the towns is fed. The water mains have been constructed in 1960s. The routes of the water mains pass by the two sides of Herher-Vayk road, in some sections by the banks of Arpa river, which is water-logged during the months when the snow melts; before reaching the regulation node it also passes through the area of Vayk town cemetery. The existing DRR, doesn’t have a dominant position and the required design capacity, so it has a direct influence on the operation regime of the water main and distribution network. The water supply distribution network of the town (about 19.2km) is carried out from 50-400mm diameter cast-iron, steel and polyethylene pipes. In recent years “AWS” CJSC has carried out reconstruction work of some waterlines of the distribution network at his own expense. Since there is not enough pressure in the water main in Shinararner street, the water doesnt reach “Mozi” DRR located in the north-west of the town. As a result the north-western section of the street is deprived of water. “Mozi” DRR, which has a capacity of 500m3 capacity is situated on the elevation of 1345m. Pressure regulation and water volume distribution is not possible to carry out in the distribution network as a result of the DRR’s lack of capacity, installation mark, as well as the extremely cut relief of the settlement. Water supply service are provided to 1700 consumers in the community, about 75% of which has water meters. The community has a 27 hour water supply. According to the measurements already carried out, the town of Vayk gets 100-110l/sec water volume, which exceeds the design norm about 5 times. Subproject VIII 5 HGSN Ltd. -JINJ Ltd. Water Supply and Sanitation Sector Project - Additional Financing The town has a sewage system; the existing sewage network is about 9.0km, and is carried out from 100÷400mm metal, cast-iron and asbestos-cement pipes. The wastewater removal system is not in satisfactory condition and needs to be partially repaired. There are houses which have a wastewater removal system in the town, which are not connected to the central sewage system (houses in the streets of Shinararner and Melikyan). They are connected to the storm sewage ditches flowing along these streets. Jermuk town is served by AWS. “Jrat” catchments serve as a water spring for the town. The water springs are located in the north-west part of the administrative area of Jermuk town, located on the elevations of 2200-2220 and occupy about 4.0ha area. The discharge of the water springs is 90-100l/sec. Water disinfection is carried out in the chlorination station in the area of the head structure based on the vacuum principle. In the area of the catchments there are 2 reinforced concrete reservoirs, each with the capacity of 250m3, which serve for the contact of choline. After the reservoirs the water is transmiited to the distribution network of Jermuk through two Ø300 and Ø200 diameter steel and cast-iron water mains. After passing the sanitary zone of DRR the above mentioned water mains serve as distribution network pipes. In the area of the head structures there is no fence of the sanitary zone. The town water supply system is about 15km, carried out from 50-300mm diameter cast-iron, steel and polyethylene pipes. In recent years AWS CJSC has carried out reconstruction work of some waterlines at his own expense. Water supply services are provided to 2260 consumers in the community, about 85% of which has water meters. The community has 24 hour water supply. According to the measurements, this town gets 80-90l/sec water volume, which exceeds the design norm about 4 times. In the town of Jermuk there are consumers (complexes of hotels, workshops), which are not consumers of AWS CJSC; their water supply is carried out from their own springs. The town has a sewage system, the wastewater removal network is about
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