Predictive Calculations of the Bulk Water Reservoir Capacity Using a Geographic Information System

Abstract

The Tuyamuyun hydro-complex on the Amu Darya River, consisting of one in-channel and three off-channel basins with a design volume of 7.8 billion m3, was intended to improve the supply of irrigation water and electricity to the Khorezm region and the Republic of Karakalpakstan and to control the catastrophic floods in the lower reaches; it was put into operation in 1984. The water reservoir complex is in joint use by the Republics of Uzbekistan and Turkmenistan. Numerous measurements showed that the useful volume of the reservoir due to siltation decreased from 2.34 billion m3 to 770 million m3, i.e. by 67%. To partially compensate for the lost capacity, it was proposed to build-up the protective levees and to erect the new dams, where the topography of the area allowed. Using the GIS, the predictive volumes to increase the capacity of the Channel water reservoir have been proposed, depending on the water level in the reservoir, which between the marks ▽130.0 and ▽131.5 amounted to 527.3 million m3. The necessity was shown to increase the height of the following protective dams: No. 1 ▽134.5, No. 2 ▽134.8, No3 ▽136.7, No. 4 ▽134.4, No. 5 ▽136.4. No. 6 ▽137.9, No. 8 ▽138.6, No. 9 ▽135 and land dam 134.8.

Fundamentals of hydraulic calculation of settling tanks and the choice of their optimal parameters (in the drip irrigation system)

“…According to calculations, the total length of the settling basin will be 41 m, width 13 m, of which the length of the first chamber will be 25 m, depth 2.0 m, and the length of the second chamber will be 16 m, depth 1.7 m. According to the above recommendations, the volume of water in one-time filled sumps (cooling pools) reaches 3-5 hectares, and the irrigation norm for irrigating 20 hectares of land is 6 times. Therefore, it is important to develop recommendations to substantiate the optimal parameters of drip irrigation systems in farms receiving water from the Amudarya basin [5,6,[11][12][13][14][15].…”

Filtration reliability and safety of earth-fill dam

“…Tuyamuyun hydroelectric complex, which carries a large amount of suspended sediment with turbidity up to 12 kg/m 3 is the first on the list [8][9][10][11][12]. At present, out of 2.34 billion m 3 of the volume of Channel water reservoir, only 770 mln.m 3 is left, i.e.…”