Environmental performance reviews united nations
River basin Area and water demand by development scenarios
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- Figure. 6.1: Groundwater use in 2008, thousand m 3 /day Source: State Committee for Nature Protection, 2009. 2000 2001
- Table 6.5: Percentage of water supply coverage, 2000–2006
- Box 6.1: SamAuto: Sustainable water management in industry
River basin Area and water demand by development scenarios M aximum M aximum 2010 2025 M inimum Optimum M inimum Optimum Table 6.4: Irrigation development and water demand for irrigated agriculture Source: Global Environment Facility: Water and Environmental Management Project for the Aral Sea basin, A1 Component. National Working Group Final Report, 2002. Note: Scenarios do not consider changes in dietary habits. Drinking water 63% Irrigation 26% Production and technical water 11% Figure. 6.1: Groundwater use in 2008, thousand m 3 /day Source: State Committee for Nature Protection, 2009. 2000 2001 2002 2003 2004 2005 2006 Urban 79.8 81.2 84.3 87.3 93.1 95.0 96.0 Rural 72.3 74.9 74.9 75.0 79.1 82.3 85.4 Table 6.5: Percentage of water supply coverage, 2000–2006 Source: http://www.statistics.uz, 2009. Chapter 6: Sustainable management and protection of water resources 93 the available fresh groundwater resources meet the drinking water demands of the population. However, it should be mentioned that, during the last few years, groundwater quality has been deteriorating, resulting in a reduction in groundwater reserves that can be used as drinking water sources. Groundwater resources in the western territories of the country are reported to have increased in salinity and hardness. Urban populations are better provided with drinking water. Ninety-six per cent of the urban population is connected to the drinking water supply network; in rural areas this figure declined to 85.4 per cent in 2006 (table 6.5). Drinking water supply problems are very acute in the Bukhara and Navoi regions and the Republic of Karakalpakstan. Average water supply system efficiency is only 63 per cent, and in a number of regions this figure ranges from 42 to 62 per cent due to various technical and organizational problems, such as obsolete equipment, missing water flow meters, and insufficient reliable data and analysis. Many people have to use water from wells and irrigation canals. In most cases, this water does not meet sanitary requirements (especially in the summer). Currently, about one third of the country’s population consumes drinking water that does not meet the national requirements. The monitoring data reveal the non-conformity of tap water quality to the accepted standards by its chemical and bacteriological composition (table 6.6). Drinking water consumption (l/day per capita) in rural areas decreased from 180.5 l/day in 1996 to 114.8 l/day in 2004, and in urban areas from 549 l/ day to 325.7 l/day due to the introduction of water metering and water pricing. A significant proportion of municipal and drinking water supply is provided by groundwater. Owing to the uneven distribution of fresh groundwater reserves, some regions have a shortage of drinking water, such 2002 2003 2004 2005 2006 Chemical composition 16.3 15.9 16.3 18.9 11.7 Bacteorological composition 5.1 5.2 5.5 6.0 7.5 Table 6.6: Percentage of drinking water quality samples not conforming to standard requirements, 2002–2006 Source: State Committee for Nature Protection, 2008. Note: Samples were taken from municipal water conduits. as the Republic of Karakalpakstan and the regions of Khorezm, Bukhara, western districts of Samarkand, Kashkadarya, Jizzakh and Surkhandarya. The goal of the authorities is to provide the entire population with good quality drinking water and to meet the municipal water demands of cities and settlements through centralized water supply systems. Annual consumption in the period 2002–2008 amounted to between 2.15 km 3 and 2.34 km 3 . The drinking water supply of Tashkent, which has an area of 330 km 2 , 2.3 million inhabitants and a coverage rate of 99 per cent, consists of three main sources with two groundwater deposits and one surface water source providing 2.3 million m 3 /day over a supply network of 3,500 km. Although there are periods with clear crude water, purification using filtration and chlorination is necessary in order to meet all national and international standards. The use of drinking water in industry is not allowed, with some exceptions for small enterprises. In 2009, almost all households will be equipped with water meters, which have already been installed in almost all multi-apartment houses and about 50 per cent of all households. Statistics clearly indicate that households equipped with water meters have an average daily consumption of only 140 l/day per capita, whereas households without water meters have an average daily consumption of 580 l/day per capita. Hydropower production Twenty-eight hydropower stations produce 12.5 per cent of the electricity. The future development of hydropower in Uzbekistan will be aimed at maximizing the capacity and efficiency of one of the most important renewable energy sources. The plan in the near future is to restore and develop the existing hydropower stations. The total use of water resources by the hydropower sector varied from 3.95 km 3 /year in 2002 to 5.0 km 3 /year in 2008 and is estimated at 4.04–4.15 km 3 /year for 2025 (chapter 8). 94 Part III: Environmental concerns in economic sectors and sustainable development Fishing industry One of the serious consequences of the Aral Sea disaster is the loss of the country’s thriving fishing industry, which once provided 20,000 tons of fish annually. The relocation of the fishing industry from the sea to the lake system of the Aral Sea littoral zone has not prevented a steady decline in the region’s fish catch. As a result of this relocation, the fishing industry has been reoriented to pond fish breeding and all the suitable water bodies are now used for this purpose, particularly the Aydar Arnasay Lakes System. The increase in water mineralization and pollution by toxic substances resulting from the disposal of irrigation return waters and industrial effluent into water bodies has a significant effect on the fishing industry. Despite the fact that this industry is considered a water user rather than a consumer, it consumes around 60 per cent of the 0.368 km 3 of annual water intake. As a result of this increase in capacity, the total water demands of the fishing industry will rise sharply. By 2010, water demand will rise to 2.1 km 3 /year and will reach 2.4 km 3 /year by 2025, up from 0.43 km 3 /year in 2002 and 0.72 km 3 /year in 2008. 6.5 Wastewater Collector–drainage water from irrigation The annual discharge of collector–drainage water into streams and receiving reservoirs amounts to 20–25 km³. The content of nutrients (nitrogen and phosphorus) and pesticides in collector–drainage water is significantly higher than in surface water. The most mineralized of these waters (up to 9 g/l) are found in the lower reaches of small rivers and the Amu Darya River. To prevent pollution in the Amu Darya River, a package of measures on drainage flow management along the right bank of the river has been developed under the Drainage, Irrigation and Wetlands Improvement Project financed by the World Bank. These measures could make a considerable contribution to saving water in Uzbekistan and in the whole region. Sewerage in rural and urban areas Although the in-stream disposal of public utility wastewater has been decreasing in recent years, the purification rate is not sufficiently high. The low operating efficiency of wastewater treatment plants (50–70 per cent against rated capacity) results in an increased concentration of pollutants in surface water streams and depression reservoirs. Treated wastewater is reported to contain increased concentrations of ammonium and nitrites. The situation is most difficult in regions characterized by a water deficit, such as the Republic of Karakalpakstan and the regions of Khorezm and Bukhara, and in areas with a high level of industrial agglomerations (Tashkent, Fergana, Samarkand and Navoi industrial areas). Therefore, the middle and lower reaches of the majority of regional rivers are characterized by increased water salinity as well as sulphate, chloride, fluoride, mercury, phenol and silicon concentrations that regularly approximate or exceed MAC values. Given that main water streams can no longer be used as sources for drinking water supplies, adequately providing the population with good quality fresh drinking water is one of the country’s most serious problems. The sanitation network of Tashkent City, which has a coverage rate of more than 90 per cent, has a sewage network of 2,800 km and three sewage treatment plants, which need to be reconstructed. For this purpose, a contract for credit of over US$ 29 million from the Islamic Bank for Development will be signed in 2009. For industrial wastewater, the local municipal water company (vodokanal) requests the enterprise to ensure the pre-treatment of industrial wastewater. Otherwise, the enterprise must treat the wastewater at its industrial site to reduce the concentrations and charge of the pollutants before releasing it into vodokanal channels. Industrial wastewater Uzbekistan’s industry withdraws 1.2 km 3 of water annually, only 0.58 km 3 of which is consumed. Almost half of the withdrawn water is returned in the form of industrial effluent, which poses an ecological threat to the environment. Five hundred and two industrial Chapter 6: Sustainable management and protection of water resources 95 Box 6.1: SamAuto: Sustainable water management in industry SamAuto is an enterprise located in Samarkand which produces buses and trucks. Since industrial processes have an impact on the environment, environmental issues were discussed from the design stage of the factory (ISO 9001 from 1991 to 2007, and ISO 14000 since January 2008). The company uses groundwater from artesian wells with a backup connection to the municipal drinking water supply network. For this purpose, the enterprise needs a special licence on the basis of a hydrogeological study. About 3 m 3 of water per vehicle is necessary during the production cycle. Using a multistep treatment facility consisting of mechanic and chemical treatment processes up to the final step of ion exchange with reclaimable material, a majority of the treated wastewater is used as recycling water in the painting box. The rest of the purified wastewater is discharged into the mu - nicipal sewage network, for which the company must pay fees according to the water meter charges and the analysed re- sidual concentration of pollutants. Scheduled inspections are carried out in periods of two to three years, whereas, if fail- ures occur, the inspection period is shortened to one year (See chapter 2: Compliance and enforcement mechanisms). The next step in development will be the use of water-based paints instead of paints containing organic solvents; this will be checked over a one year period. enterprises dispose of around 0.14–0.17 km 3 /year of poorly purified effluent containing heavy metal salts, fluorides, phenol, petrochemicals, all nitrogenous groups, and biological and other pollutants specific to particular industries into surface water bodies (box 6.1). About 1–5 per cent of industrial water, from more than 100 enterprises, is disposed of into streams without treatment. Industrial production accounts mainly for water pollution by heavy metals, phenols and oil products. Industrial, household/municipal and collector– drainage waters disposed of in streams contain 8 to 15 pollutants whose concentrations exceed the MAC values for domestic/drinking water supplies and fishery waters by 2 to 10 times. As part of restructuring the country’s economy, industrial water consumption will be oriented to closed cycles of water use that will allow a reduction in consumptive water use by up to 24–25 per cent. Total intake for industrial needs will increase to 1.4 km 3 /year by 2010, and 1.6 km 3 /year by 2025, from the current level of not more than 1.2 km 3 /year. In recent years, the share of industrial water recycling has been increasing, with the highest rate of water recycling found in the industrial enterprises of the Tashkent, Navoi and Fergana regions. 6.6 Water policies and strategies Policy objectives The main aim of the Government’s water sector policy is to promote the rational use of water and to protect water resources. It also aims to improve the efficiency and reliability of the country’s water sector management, ensuring guaranteed water delivery and providing essential services both to society and natural ecosystems for the reconstruction, operation and maintenance of the existing infrastructure. The water sector reform began with the adoption of the Cabinet of Ministers Resolutions on the transition from an administrative territorial approach to a two-level system of basin irrigation management, involving the introduction of market relationships at all levels of water use through the 2003 Cabinet of Ministers Resolution on Improvement of the Activities of the Ministry of Agriculture and Water Management and the 2003 Resolution on the Improvement of Water Management Institutions. The transition from the territorial management principle with its strict centralized approach, to the more flexible systems approach based on basin principles, is fundamental for these resolutions. Internationally, basin-based integrated water resources management (IWRM) is the prevailing paradigm in managing water resources. The creation of the two-level system of national water resources management through the establishment of the basin administrations of irrigation systems (BAISs) and water user associations (WUAs) has become the most important component of the on-going reforms. Legislation The most important legal document is the 1993 Law on Water and Water Use, with its December 2007 amendments. The Law contains significant provisions on regulating the water sector’s rational use of water for the needs of the population and the national economy; protecting water from pollution 96 Part III: Environmental concerns in economic sectors and sustainable development and depletion; preventing and eliminating other negative impacts on water; improving the condition of water bodies; protecting the rights of enterprises, institutions, organizations, private farms and dekhkans (small family farms) and citizens in relation to water. The Law is currently under revision, with proposals to include the different categories of water consumers, water users and water bodies. The 1999 Law on the Safety of Waterworks is aimed at ensuring safety in the design, construction, commissioning, reconstruction, restoration, conservation and demolition of water structures. Many important aspects of state management, use and protection of water resources are regulated by by-laws and Cabinet of Ministers Resolutions, for example the 2002 Law on Granting the Status of Specially Protected Natural Territories of National Value to Formation Zones of Groundwater. In line with government priorities, an Oliy Majlis commission, together with governmental agencies and stakeholders, is preparing a law on WUAs, as well as a new version of the Law on Water and Water Use and other legal acts. Since 2001, eight Cabinet of Ministers resolutions have been adopted concerning rivers, and three concerning groundwater. They ensure, among others, an improvement in the organization of water resources management and irrigation management, the regulation of all water use, and the preservation of protected natural areas through the withdrawal of facilities that represent a danger to the environmental from the water protection zones of the eight major rivers. So far, 155 such facilities have been withdrawn. An inventory of groundwater sources and measures to safeguard water protection zones along the designated areas of fresh groundwater abstraction are being carried out. Implementation of strategies and programmes The 2002 Concept of Integrated Sustainable Water Supply sets forth the principal objectives for water management and amelioration measures for 2008– 2011. These directives envisage major improvements in land use through better drainage, an increase in the efficiency of agricultural water supply through irrigation modernization, and the introduction of IWRM. Closely related to the Concept is the 2001 Strategy for the Development of the Irrigation and Drainage Sector and the National Programme on the Development of Irrigation for 2000–2005. Together, these two documents are important instruments for implementing water resources management policy, which is of prime importance for agriculture and the environment. Uzbekistan participates in the European Union Water Initiative, whose political support is strengthened by European Union commitment to achieve the key tasks associated with water, such as reducing the number of people without access to safe drinking water and sanitation by 2015, or the development of IWRM and efficient water use planning by 2015. The development of Uzbekistan’s national IWRM strategy will help to overcome the existing barriers and adaptation to the changes in water and land use associated with the expected demographic growth, migration and the growing demands of the population. The following activities were carried out in the country under the relevant programmes and projects: (1) The IWRM Fergana Project (2001–2005), which increased the field application efficiency of irrigation water from 42–51 to 69–81 per cent. (2) The IWRM-orientated drainage project for the Right Bank Collector with a package of technical interventions, as well as all possible options and scenarios for collector–drainage water management. (3) The restoration of the Lake Sudoche wetlands in the Amu Darya River delta. (4) The establishment of the Nuratau-Kyzylkum Biosphere Reserve. (5) Projects focusing on improving the knowledge on and awareness of IWRM, such as the ZEF (Center for Development and Research)/United Nations Educational, Scientific and Cultural Organization Project on Sustainable Management of Land and Water Resources in Khorezm, carried out with financial support from the international community, which will contribute to the successful introduction of IWRM in Uzbekistan. The State Programme on Providing the Rural Population with Drinking Water and Natural Gas for the Period 2000–2010 is intended to extend water supply network coverage to 85 per cent of the population and to reduce per capita consumption in cities through, for example, installing meters, Chapter 6: Sustainable management and protection of water resources 97 eliminating leaks and changing water consumption rates. The Programme also envisages providing alternative water supply sources for remote areas that cannot be reached through conventional means. The 1998 National Environmental Action Plan for 1999–2005 predetermines state policy aimed at improving the quality of surface water and groundwater. The Programme of Actions on Nature Protection for 2008–2012 includes measures on water treatment plants, the reconstruction of sewage plants and the construction and maintenance of water pipelines. 6.7 Institutional setting for water resources Download 5.03 Kb. Do'stlaringiz bilan baham: |
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