Dien Bien Province : environmental assessment

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This is an environmental assessment for the Vietnam Second Rural Energy Project, which improves access to good quality, affordable electricity services in rural communities. The report assesses the likely negative environmental impacts and proposes measures to mitigate them. The report makes the following recommendations: Align route to avoid land acquisition and resettlement and provide compensation for project-affected households. Get approval for tree cutting on public lands and natural reserves. Remove, relocate, and/or compensate for loss of cultural property. Identify explosives and toxic waste locations and remove. Avoid tree cutting, replant if required for endemic and rare species, and avoid burning of wood residues. Cover trucks and avoid using heavy vehicles on rural roads. Dispose of construction waste at permitted dumpsites. Excavate erosion-prone areas during dry season only, fill in borrow areas, and install drainage works if needed to avoid erosion. Ensure that no PCBs or asbestos is used during construction. For temporary land loss, provide compensation, and rectify impact after construction. Restore temporary access roads to their pre-project state. Use water sprays on roads and piles of dirt and avoid night works in sensitive areas to reduce dust and noise. To prevent electricity hazards, make sure pertinent parts of system are turned off, and equip workers with protective clothing and approved safety tools. Provide latrines for workers. To minimize social impacts, hire local people, maintain relations with communities and unions, and remove and rehabilitate worker camp areas. Provide workers access to safety training and adequate medical facilities. To reduce safety hazards for the public, wage an information campaign. Control access to protected areas. To reduce petroleum, hazardous waste contamination, and solid waste production, develop and implement a maintenance plan for transmission and distribution structures.
1 : 0 =; SOCIALIST REPUBLIC OF VIETNAM RURAL ENERGY 2 PROJECT l FEASIBILITYSTUDY 3 DIEN BIEN PROVINCE Volume 2 ENVIRONMENTAL ASSESSMENT Project Manager Ngiyer Dtc Qiyet Deputy Chief Clerk Ngutyen Anh Tuian PP. Director Technical Scientific Service Enterprise De t director Nge Vn Do '' n l l ~~~~~~~~~Nguyen Van Dong ELECTRICITY OF VIETNAM l .... l WB credit VN - 4000 l ENVIRONMENTAL ASSESSMENT AND ENVIRONMENTAL MANAGEMENT PLAN I Vietnam Rural Energy 11 Dien Bien province Prepared by Science, Technology Service Enterprise Power Engineering and Consulting Company N1 Hanoi, July 2005 11 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~1 1. INTRODUCTION AND SCOPE OF WORK 1.1. Objectives of the Project The development objectives of the proposed Rural Energy II Project are to assist the Government of Vietnam to alleviate poverty in the rural areas by providing basic I infrastructure service such as electricity and access to general services, for improving living conditions and productivity. The Project will assist the Government of Vietnam to implement its national objective of providing electricity to about 12 million rural households through: - An effective strategy for rural electrification with special focus on provision of energy to the remote mountainous areas; 3 - Rehabilitating, upgrading and expanding the rural power system in order to meet the demand for power supply for future socio-economic development; - Strengthening reliability and quality of power networks, reduce voltage and I electricity losses on the grid, lower rural consumption price, improve businesses efficiency and rural power management ability of local power management boards; - Refurbishment of the existing rural power network to increase reliability and quality I of supply, including reduction of technical and non-technical losses; this Project incorporates 12 communes in 5 districts (Dien Bien Dong, Tuan Giao, Tua Chua, Muong Lay, Muong Nhe) of Dien Bien province. - Extension of existing power networks to supply additional households; - Assisting local District and Commune committees to improve power system 3 management processes and improve business efficiency, to provide electricity reliably, safely and at reasonably cost; - Review rural power management models, to establish power management units of I legal standing, with economic independence and the managerial/technical skills to operate effectively and profitably, repaying loaned funds; - Expanding the use of renewable energy for the off-grid systems to serve the rural load in the remote and isolated areas, where feasible and economically practicable; 1.2. NEED FOR PROJECT INVESTMENT Based on the forecast data on economic development, power demand, the current situation of the existing power distribution network of the Project's commune. The existing distribution network is degraded, not synchronous. Power losses are very high. The alignment of power lines is not well designed. Many types of poles are existed in the network. The alignment of power lines is not well designed. There are also many types of electricity meters. In the past in order to save money, the distribution lies were created to go across gardens, ponds etc. The conductor is overhead type and not covered by any insulating materials, so it cause a lot of risk on safety to local people. The Project is planned to implemented in order to: - Improve the quality of the existing distribution network in the Project's communes. - Increase the safety management of the distribution network; - Reduce power losses; 2 1.2.- Increase electricity supply for the Project's communes; l - Change the form for management model of rural power network; - Graduaily modernize the distribution power network. 3 1.2. Commune selection criteria 1.2.1. General criteria l To be voluntary participants in the Project and understand requirements and regulations of World Bank and the Government of Vietnam to carry out RE il 3 Project; * To be willing to convert the communes power management model to legal local distribution units to control LV networks; I * To have potential for economic development; * To have an acceptable capital recovery rate; * Revenue from power business can cover management, operation and funding costs. 3 1.2.2. Criteria for selection of communes for rehabilitation * Power losses exceeds 20%; aged power networks degraded and require refurbishment; 1 * Power demand is substantial (over 500 households); * Power demand for industrial production is substantial (over 20%); * Number of electrified communes over 80%; * Average power consumption rate power household in substantial; estimated annually 500 kWh/household. 1.2.3. Criteria for communes to be connected * Number of households connected to power network is Provincial communes is I | bellow the average (60%); * Customers are able to pay cost of connection and subsequent power bills; * Communes have potential for development in agriculture, forestry and handicraft, which would be enhanced if electrified; * Communes in the poorest communes list; * Communes in the assistance program of World Bank. * Communes are ready to adopt the management model of power network. Table 1.1. Project communes N No I Name of communes DIEN BIEN PROVINCE Dien Bien Dong district 1 Xa Dung 2 Phinh Giang 3 Hang Lia Muong Nhe district 4 Muong Toong 5 Chung Chai Muong Lay district 6 Hua Ngai 7 Xa Tong *_______ Tua Chua district 8 Sin Chai 9 Muong Dun I Tuan Giao district 10 Ta Ma 11 Na Say 12 Muong Mun 4 I- ' OJECT DESCRIPTION I .1. PROJECT SCALE - MEDIUM VOLTAGE edium voltage part of the Project will be consisted of 185 km distribution lines. I Total number of new substations is 49. Power company No I will be the Project Owner for medium voltage part of the Project. U !.2 PROJECT SCALE - LOW VOLTAGE Low voltage part of the Project is consisted of 124.58 km low voltage transmission line, ro which I - Total number of energy meters is 4,289 sets. I Provincial People committee will be the Project Owner for low voltage part of the Project. 2. . INVESTMENT STRUCTURE OF THE PROJECT I Ta le 2. 1. The investment structure of the Project (VND) Items Medium Voltage Low Voltage 1 Equipment 2,829,250,802 2 Construction 42,670,563,501 17,795,072,781 3 Compensation 67,170,500 4 Other cost 12,488,708,840 3,993,237,184 5 Contingencies 4,644,455,491 2,178,830,996 Total 62,700,149,135 23,967,140,961 2.. PROJECT COMPONENTS I T; ble 2.2. Project's components -LOW VOLTAGE No No of No of energy Length of LV District communes meters line (m) 1 Dien Bien Dong 3 1,463 37,500 2 Tuan Giao 3 2,041 41,300 3 Tua Chua 2 1,188 23,200 4 Muong Lay 2 1,107 18,600 5 Muong Nhe 2 1,708 30,660 TOTAL 12 4,289 124,580 5 I able 2.3. Project's components - MEDIUM VOLTAGE Number of No of substation District Communes New MV line (m) 3 1 Dien Bien Dong 3 93.6 15 2 Tuan Giao 3 58.8 16 | 3 Tua Chua 2 24 7 4 Muong Lay 2 17.1 4 3 5 Muong Nhe 2 30.8 6 TOTAL 12 185,000 49 I~~~~~~~~~~~~~~~~~~~~~~~~~~ I 8 i 2.3. BRIEF DESCRIPTION OF NATURAL AND SOCIAL CONDITION OF THE PROJECT'S PROVINCES Geographical position and topography Dien Bien was separated from the former Lai Chau province. The province is mountainous in North West of Vietnam. South West of the province is People republic of Laos and; North is Van Nam province of People Republic of China; South is Son La province and East and North East is Lai Chau province. small Topography of Dien Bien is complicated with mainly mountains mixed with short streams, big rivers, small valleys, high slope. Limestone mountains are present in border with China. I Natural area of Dien Bien is 9,554 km2 Population of Dien Bien is 443,529 people. Average population density is 35 people! km2. There are many l ethnics living in Dien Bien province as Thai (40.38%), H'Mong (28.81%), Kinh (19.71%), Kho Mu (3.2%) and other ethnics (7.9%). Dien Bien Phu city is center of Dien Bien. I Climate Dien Bien has monsoon climate characteristics. * Hot and rainy season from April or May to November. Average temperature is 21 to 23 oC. I . Cool season and dry season from December to February of the next year. Average temperature is 14 to 18 oC. I Average rainfall: is from 1,500 mm to 2,700 mm. Average humidity: 84% l Land resource Total natural land: 649,326 ha . Agricultural land: 108,153 ha * Forested land: 528,369 ha; . Other land: 12.804 ha; * | Water resource There are big rivers like Da river, Nam Rom river, Ma river etc. I Protected areas . Muong Nhe Nature Reserve is located in Muong Te and Muong Lay district of Dien Bien province, in the extreme north west of Vietnam. Chung Chai and Muong Toong - Project's communes are located inside the Muong Nhe Nature Reserve. * Muong Phang Cultural and Historical site is in the Muong Phang valley. There is no Project's commune located inside the cultural and historical site. Industrial activities: tea processing, production of agricultural products and other consumable goods, rock exploitation of natural resources, etc. Agricultural and husbandry: rice cultivation, industrial trees, dry crop, fruits. 7 I 2.4. SOME OF MAIN TECHNICAL SPECIFICATIONS FOR THE PROJECT 2.4.1. Medium voltage MV substation * To reduce the investment cost, facilitate site installation and uniform project standards, the following is to be implemented: U * All new substation are designed as outdoor type pole mounted. With substation capacity S 75 kVA two pole type construction will be used. With substation capacity S 31.5 kVA 3 one pole type construction is used. * Reduce the existing transformers if possible and not consider rehabilitation. Substation rehabilitation is carried out yearly according to the EVN maintenance plan. 3 * Substation requiring relocation or new pole support structures are to be built as outdoor type, mounted on poles. I The new substation are all pole mounted, as follows: * If capacity S = 75 kVA, mounted on two poles; * If capacity S = 31.5 kVA, mounted on 1 pole. Substation poles are centrifugal concrete type of 10 m or 12 m length, Class C suitable for any requirement. I Substation base (floor) is filled 0.3 m deep with soil and covered by mixture of cement and broken bricks * | MV lines Voltage levels: MV lines are designed to accommodate any future voltage level, defined in the I power network development and planning scheme for Dien Bien Province. In the long-term, voltage levels 35 kV, 22 kV and 10 kV of MV power networks are used, in conformance with voltage of existing 110 kV and 35/10 kV substations and transformer station to be built in 2005. * | Branches supplying power to transformer station at 35 kV will be connected into the existing 35 kV lines and designed at the 35 kV voltage level. 3 Pole size All poles are 10m, 12m, 14m, 16m and 20m length of classes A,B,C,D. Pole size selection is based I | on the safe clearance to ground, transportation and traffic structures, crossings, development requirements, sharing of lines for MV and LV voltages. Pole strength is selected from load requirements. I | In general, the use of poles is as follows: * For single circuit lines: centrifugal concirete pole 1Om, 12m. 3 | * For double circuit lines: centrifugal concrete pole 14m. * Stayed, crossing positions and special positions: 16m, 20m poles. Poles are manufactured to Vietnam Standards and Regulations DNT-QDKT-09/2000. Pole foundation To support poles, cast in situ Ml 50 concrete foundations are used. |;: S~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ i j In the Project, MT1, MT2. .. MT8 type foundations are used. The selection of foundations for each position is specified in the design stage, based on estimations of local soil, geological and hydro- geological conditions. For sand areas, types of cast in-situ excavated foundations: MO1, M02, M03, M04 are used. I For marshy land areas, foundations should be reinforced by bamboo stakes, bamboo rafts to strengthen the bearing capacity of foundations and to reduce stress against the foundation surround. I Foundation depth is 10-12% of pole height plus 0.3m. 2.4.2. Low voltage I Electricity pole Concrete poles for most lines are H-section type, cast in workshops. I For 3 phase lines and branches along inter-District, inter-commune roads: 7.5m, 8.5m pole sizes. For two wire branches to communes: 6.5m, 7.5m pole sizes. For 1 phase lines into household groups: 6.5m pole size. IA A-B-C type poles according to bearing requirements of each position; manufactured to the standard DNT-QDKT-09/2000. For poles near vehicle transport areas: use 10 m, 12 m centrifugal concrete poles to ensure safe clearances. For MV, LV line co-sharing positions: use MV line concrete poles. Most concrete poles are A and B-type poles, manufactured to standard DNT-QDKT-09/2000. Square concrete poles and circular concrete poles are used at the following positions: * Straight, corner positions of 3 phase trunk lines: single poles; and I * Corner anchor, straight anchor, end anchor: double poles. If poles are installed near households, trafficable roads, double poles should be used at corner I | anchoring, straight anchoring, end anchoring positions; stayed tension poles are used only at such high bearing positions that double poles could not solve and tension poles are conveniently placed; Utilize existing poles which are of good quality and satisfy the standard when installing new I | conductors. Poles under 7.5m size are not used for 3 phase trunk lines. Poles recovered from lines are to be returned to localities to allow people to re-use poles to support supply lines to houses. 3 | Pole foundation To support line poles, cast in-situ M100 concrete block foundations are used: I . For single poles: use MV1, MV2 * H double poles: use MV3. The depth of foundations is in proportion to pole heights and is shown in the overall layout of LV pole, cross-arm and foundation. If double poles cannot satisfy the high bearing requirements and are in tension pole positions, it is required to use: 9 I * 14 tension poles with foundation in proportion to pole height. Tension poles contain 014 round hot dipped steel according to Vietnamese Standards; I * MN 15-5 anchors buried 1.5-2.Om according to bearing requirements and site clearance; * MN 10-10-7 stayed-on-the-spot anchors in sand areas. I For lines across sand areas (rivers, coastal), cast in-situ M100 concrete excavated foundations are used, in combination with pre-cast M200 reinforced concrete round pipes with E1000, /El 200, I / El 500 diameter. For reused pole positions, if conductor size increased by two or more sizes, must increase concrete I in the existing foundation to ensure bearing requirements are satisfied. I~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I 3. LEGAL FRAMEWORK FOR PROJECT'S ENVIRONMENTAL IMPACT ASSESSMENT 3.1. VIETNAM REGULATIONS AND LAWS - Law on Protection of the Environment (LEP) was enacted in 1993. - Decree 175/CP was promulgated in 1994 to guide implementation of the LEP and provides broad guidelines for division of responsibility among Ministries; environmental impact assessments; 1 pollution prevention and disaster control; sources of finance; and environmental inspections and standards. 3 - Decrees 143 on amendment of Item 14 of Decree 175 CP dated 18/10/1994 of Government on guidance for implementation of LEP. - Circular No. 490 Guidance on setting up and appraising environmental impact assessment reports * for investment projects . - Law on Forest Protection (1992). This law regulates forest management, protection, development, I and exploitation, prevention of woodcutting, and forest destruction. It also encourages individuals and organizations to protect and develop forests. l - Decree 54/1999/ND-CP relating to the protection of high-voltage networks. - Decree 70/1987-HDBT specifies safety casements of high-voltage transmission lines. - Decree 24/2000/ND-CP specifies the implementation on the Law on Foreign Investment in Vietnam (Article 82) concerning environmental protection. - Decree 52/1999/ND-CP includes environmental considerations for construction management. - Decree 26/1996/CP provides regulations on the punishment of administrative violation of Environmental Protection Law. 3 | - Vietnam National standards (TCVN) are national standards established by the Ministry of Science and Technology (MoST) and applied to all govemment agencies. They include engineering, construction, scientific, and environmental standards. TCVN environmental standards include 3 acceptable limits of many air, noise, and water quality parameters. - 11 TCN-1984 sets the standard for minimum clearance between live parts of a line and trees. I 3.2. WORLD BANK SAFEGUARD POLICIES l - OP 4.01 Environmental Assessment; - OP 4.04 Natural Habitats; - OP 4.11 Cultural Property; - BP 17.50 Public Disclosure. Detailed guidance on assessment methodologies and common impacts associated with transmission projects are found in: 3 . World Bank, 1991. Environmental Assessment Sourcebook, Volume 3. * IFC, 1998. Environmental, Health, and Safety Guidelines on Electric Power Transmission and Distribution. . Framework for Applying Environment Safeguards to Rural Energy II Project. * | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~11 4. ASSESSMENT OF ENVIRONMENTAL IMPACTS 4.1. CLASSIFICATION OF IMPACTS l The Environmental Impact Assessment focuses on the major environmental issues of the Project's Most Favoured Alternative. The potential impacts of the Project's pre-construction, construction, and operation phases were assessed as being in one of five categories: i. NO IMPACT. The potential impact of the Project activity is assessed as NO IMPACT if the project activity is physically remo
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