Краткое содержание отчета по экологической оценке Проекта по уст ойчивом у управлению т верды м и от ходами

Surface w ater and ground w ater resources
249. 
The main water course in the province is the Chirchik river, which is formed due to 
the confluence of the Chatkal and Pskem rivers. The flow of the Chirchik river is regulated by 
the Charvak water reservoir, with a usable capacity of 2 billion m3. Along its route, the river 
receives only two comparatively big inflows: on the right side, the Ugam river, and on the left 
side, the Aksakata river. Other tributaries have the character of small inflows, including the 
largest ones such as on the right- Aktash, Shurabsay, Tavaksay, Azatbash, on the left -
Chalibsay, Parkentsay and Bashkizilsay.
250. 
The Chirchik river is heavily diverted for irrigation by channel networks. Most major 
channels are the Zakh, Boz-Suv channels (right) and the Northern Tashkent channel (in the 
upper part it is called Left Bank Kora-Suv). Channels are characterized by high flow capacity 
and they have a view of real rivers. Waters of the Chirchik river are taken for irrigation and 
are used for hydropower needs (diversion channel of Chirchik Hydropower Plant drops some 
of its water through the Boz-Suv channel directly into the Syrdarya river). The Chirchik river 
gradually reduces its flow and goes to Syrdarya river. The length of the Chirchik river is 174
72

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km, the basin area is 14 240 km2.
Soils
251. 
Soil-forming rocks of the Tashkent region are soils of the ephemeral-steppe gray- 
earth type. These include gray earth meadow, meadow gray earth and meadow. Many 
features and properties of gray earths are predetermined by the parent rock — loesses. By 
cultivation, all of these soil types are irrigated. The main parent rocks were alluvial and alluvial 
proluvial deposits. The soil cover was formed in dry and contrasting desert conditions, so the 
soil does not have a high level of potential fertility.