Economic and Social Council
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UNITED NATIONS E Economic and Social Distr. Council GENERAL ECE/MP.WAT/WG.2/2007/10 19 April 2007 Original: ENGLISH ENGLISH AND RUSSIAN ONLY ECONOMIC COMMISSION FOR EUROPE MEETING OF THE PARTIES TO THE CONVENTION ON THE PROTECTION AND USE OF TRANSBOUNDARY WATERCOURSES AND INTERNATIONAL LAKES Working Group on Monitoring and Assessment Eighth meeting Helsinki, Finland, 25–27 June 2007 Item 4 of the provisional agenda ASSESSMENT OF THE STATUS OF TRANSBOUNDARY WATERS 1 IN THE UNECE REGION UPDATES AND ADDITIONS TO THE PRELIMINARY ASSESSMENTS OF TRANSBOUNDARY WATERS IN THE EECCA REGION2, 3 (Aral Sea basin, other basins in Central Asia, Black Sea basin) Submitted by the Chairperson of the Working Group on * Monitoring and Assessment 1At their fourth meeting (Bonn, Germany, 20–22 November 2006), the Parties to the Convention mandated its Working Group on Monitoring and Assessment with the assessment of transboundary rivers, lakes and groundwaters in the UNECE region. For details, please refer to documents ECE/MP.WAT/WG.2/2007/1 and ECE/MP.WAT/WG.2/2007/3. 2 Issued as documents ECE/MP.WAT/2006/16/Add.4, Add.5 and Add.6. 3 The editorial changes submitted by EECCA countries to the Russian version, which do not change the meaning of the English text, are not included. Such changes refer in particular to hydrological terms. * The present document was submitted late due to resources constraints in the secretariat and late submission of inputs by some countries. GE.07-22257 ECE/MP.WAT/WG.2/2007/10 Page 2 I. UPDATES AND ADDITIONS TO THE PRELIMINARY ASSESSMENT OF TRANSBOUNDARY RIVERS IN THE ARAL SEA BASIN AND THEIR MAJOR TRANSBOUNDARY TRIBUTARIES AS PUBLISHED IN DOCUMENT ECE/MP.WAT/2006/16/Add.4 A. Updates by Kazakhstan on the Syr Darya River In paragraph 45, for the existing table substitute: Water pollution characteristics of the Syr Darya River in Kazakhstan (Kokbulak measuring station ) Year Water Determinands Average Factor by Water quality pollution concentration in which the index mg/l MAC is exceeded Manganese 78.120 1.95 Sulphates 662.41 6.63 Class 3 2001 1.26 Iron (2+) 0.018 3.6 (moderately polluted) Copper 0.0028 2.8 Manganese 58.628 1.47 Sulphates 555.661 5.56 Class 3 2002 1.36 Iron (2+) 0.037 7.45 (moderately polluted) Copper 0.0039 3.9 Manganese 59.956 1.5 Sulphates 486.012 4.86 Class 3 2003 2.13 Iron (2+) 0.036 7.19 (moderately polluted) Copper 0.0042 4.19 Manganese 63.768 1.59 1.92 Sulphates 515.402 5.15 Class 3 2004 Iron (2+) 0.046 9.2 (moderately polluted) Copper 0.0034 3.38 Nitrites-nitrogen 0.04 2.0 Sulphates 469.9 4.7 Class 3 2005 2.03 Manganese 53.4 1.3 (moderately polluted) Copper 0.0031 3.1 Nitrites-nitrogen 0.045 2.3 Sulphates 507.3 5.1 Class 3 2006 2.18 Manganese 51.8 1.3 (moderately polluted) Copper 0.0034 3.4 Source: Ministry of Environment Protection of Kazakhstan. ECE/MP.WAT/WG.2/2007/10 Page 3 B. Updates by Kyrgyzstan on the Naryn River In paragraph 52, for the existing text substitute: The main pressure factors include untreated and insufficiently treated wastewater from municipal/domestic sources, discharges from industry and livestock breeding, wastes from ore mining and unauthorized storage of domestic waste from nearby human settlements. C. Updates by Uzbekistan on the hydrology of rivers in the Aral Sea basin4 In paragraph 5, for the existing text substitute: Of these two, only the Vakhsh is regulated (Nurek reservoir, 10.5 billion m3); therefore, floods often occur downstream of the rivers’ confluence and the Tiouya-Muiounsk reservoir on the Amu Darya (7,270 million m3). Downstream of this reservoir, the Amu Darya is fully regulated. Discharge characteristics of the Amu Darya River upstream of the Karakum Canal 3 Qav 1,970 m /s Average for: 1959–2005 Mean monthly values: October – 1,740 m3/s November – 957 m3/s December – 898 m3/s January – 816 m3/s February – 820 m3/s March – 979 m3/s April – 1,670 m3/s May – 2,670 m3/s June – 3,800 m3/s July – 4,500 m3/s August – 3,470 m3/s September – 1,950m3/s Source: Hydrometeorological Service of Uzbekistan. In paragraph 13, for the existing text substitute: Knowledge concerning the hydrological regime of the Pyanj is very limited. Moreover, due to the closure of the Nishny Pyanj measuring station in 1992, there are no discharge measurements by Tajikistan on the Pyanj River. Currently, only water levels are measured at a number of stations (Ishkashim, Shidz, Shirmandsho); but these stations do not operate regularly. With the exception of Lake Sarez (on the Bartang-Murgab-Oqsu tributary, having its source in Afghanistan, too) and a reservoir on the Gunt River, the flow of the Pyanj is not regulated, which results in severe flooding. June, July and August are the months with peak flow (on average 2,000 m3/s). In paragraph 28, for the existing text substitute: The average discharge is on the order of 170 m3/s. As a rule, the maximum discharge occurs in May (Tartki gauging station, located some 50 km upstream of the river mouth, upstream catchment area some 9,780 km2). 4 For easy reference, these updates to the hydrological regime of the Aral Sea Basin rivers are kept together in this section. ECE/MP.WAT/WG.2/2007/10 Page 4 In paragraph 32, for the existing table substitute: Discharge characteristics of the Surkhan Darya (Uzbekistan) (Inflow into the reservoir; summary values for the Shurchi gauging stations on the Surkhan Darya and the gauging station at the river mouth) 3 Qav 74.2 m /s Average for 1970–2005 Mean monthly values: October – 25.3 m3/s November – 34.4 m3/s December – 42.01 m3/s January – 45.3 m3/s February – 47.6 m3/s March – 72.8 m3/s April – 157 m3/s May – 196 m3/s June – 166 m3/s July – 72.3 m3/s August – 17.2 m3/s September – 15.3 m3/s Source: Hydrometeorological Service of Uzbekistan. In paragraph 35, for the existing table substitute: Discharge characteristics of the Zeravshan River downstream of the confluence of the Magian Darya River 3 Qav 161 m /s Average for 1997–2005 Mean monthly values: October – 91.3 m3/s November – 63.4 m3/s December – 49.3 m3/s January – 42.4 m3/s February – 39.7 m3/s March – 38.6 m3/s April – 57.1 m3/s May – 150 m3/s June – 362 m3/s July – 477 m3/s August – 370 m3/s September – 193 m3/s Source: Hydrometeorological Service of Uzbekistan. In paragraphs 41 to 43, for the existing text substitute: The river flow is strongly regulated. Major reservoirs include the Kajrakkum reservoir (design capacity 3,400 million m3) and the Chardarin reservoir in Kazakhstan (design capacity 5,200 million m3). The long-term average river discharge is a calculated value of discharges into the Naryn/Syr Darya cascade of reservoirs. This value is seen as the normative-natural flow of the Syr Darya downstream of the run-off formation area in the mountainous part of the basin. The discharge characteristics are as follows: ECE/MP.WAT/WG.2/2007/10 Page 5 Discharge characteristics of the Syr Darya, based on discharges into the Naryn/Syr Darya Cascade of reservoirs 3 Qav 34.1 km /a Average for 1958–2005 Mean monthly values: October – 2.25 km3 November – 2.08 km3 December – 2.03 km3 January – 2.10 km3 February – 2.04 km3 March – 2.43 km3 April – 3.03 km3 May – 4.27 km3 June – 4.47 km3 July – 3.97 km3 August – 3.21 km3 September –2.53 km3 Source: Hydrometeorological Service of Uzbekistan. In the downstream parts of the Syr Darya, frequent flooding of human settlements, including the town of Kyzylorda, occurs in winter. This is caused by the operation of the Toktogul’sk reservoir in Kyrgyzstan for maximum hydropower production during wintertime. In paragraph 50, for the existing text and table substitute: Downstream of the Toktogul’sk reservoir, the flow of the river is totally regulated. Therefore, the river discharge figures refer to the inflow into the reservoir as the sum of the discharge of the Naryn at the Uchterek gauging station and the discharge of three smaller rivers directly communicating with the reservoir. Discharge characteristics of the Naryn River 3 Qav 381 m /s Total inflow into reservoir (Naryn plus three smaller rivers). Average for 1950–2005 3 Qav 342 m /s Discharge of the Naryn at the Uchterek gauging station only. Average for 1959–2005 Mean monthly values (total inflow into the reservoir): October – 229 m3/s November – 198 m3/s December – 164 m3/s January – 152 m3/s February – 147 m3/s March – 159 m3/s April – 283 m3/s May – 606 m3/s June – 942 m3/s July – 844 m3/s August – 577 m3/s September – 324 m3/s Source: Hydrometeorological Service of Uzbekistan. In paragraph 62, insert the following specification into the table: Data given in the table refer to the period 1923–2005. ECE/MP.WAT/WG.2/2007/10 Page 6 In paragraph 69, for the existing text substitute: The river has a length of 217 km. There are 106 tributaries to the Chatkal River with a total length of 1434.5 km. None of the three former gauging stations of the Hydrometeorological Service of Kyrgyzstan is currently operational. The gauging station at Khudajdodsaj, operated by the Hydrometeorological Service of Uzbekistan, is functioning properly.