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- W1767945 abstract "An annual capacity of underground water resources in Uzbekistan is 66,342 thousand m 3 or 24.2 km 3 . 86% water is formed in the overburden layers and connected to surface water. Total volume of underground water is 17079.94 thousand m 3 /day. Fresh water having drinking quality (salinity is up to 1g/l) is 9 km 3 /year. Underground water pollution also has increased. Comparing to 1965 underground water resources has reduced for 36% as the result of the mancaused factors. There are 4275 hectares irrigated lands in Uzbekistan. Over 50% of ground water in this area is situated in the layers up to 2 m depth. So, bad soil drain and low level of engineering drainage system has brought to rising of soil salinity and reduction of crop. The main feeding sources of ground water are a filtration of irrigated lands and different rate irrigation canals, precipitation and underground inflow of below-located layers. Ground water rising is caused by growth of irrigated lands due to population upsurge, traditionally accepted furrow watering practice, low technical rate of irrigation canals and horizontal and vertical drainage system. Total length of inter-farm irrigation network is 27619.7 km, on-farm network-167378.8 km. 62% of interfarm and 79.5% of on-farm network have earthen channel. There are 136.7 th. km of drainage network, from which 29 th. km are main and inter-farm collectors, 107.7 th. km are on-farm drains (incl. 39.2 th. km of horizontal subsurface drainage). There are 9210 wells including 4214 vertical drains and 4996 wells are built for irrigation. At present water losses from main canals are 3197.3 mln. m 3 (13.2%); from inter-farm canals 4931.3 mln. m 3 (20.4%); from on-farm canals 8293.4 mln. m 3 (34.4%); field losses are 7724.2 mln. m 3 (31.0%). Total loss is 24146.2 mln. m 3 . In this situation 20-23cu. km A. Baba et al. (eds.), Groundwater and Ecosystems, 145–152." @default.
- W1767945 created "2016-06-24" @default.
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- W1767945 date "2006-07-14" @default.
- W1767945 modified "2023-09-25" @default.
- W1767945 title "Ground water management at irrigated lands of uzbekistan and its influence on ecological system" @default.
- W1767945 doi "https://doi.org/10.1007/1-4020-4738-x_11" @default.
- W1767945 hasPublicationYear "2006" @default.
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