Estimation of sediment volume in Tuyamuyun hydro complex dam on the Amudarya River

Abstract

The water reservoirs' sedimentation significantly impacts on its capacity and water supply efficiency, so estimation of sediment volume is an important action at management. Many methods are used for this purpose, including mathematical models, hydrologic and hydrometric methods, etc. However, each reservoir is a unique strategic object and when selecting a calculation method all specific characteristics should be taken into account. In the present research, a mathematical model and developed soft were used to estimate the water and sediment flows in the Channel reservoir of the Tuyamuyun Hydro Complex, located in the lower sides of the Amudarya River, Uzbekistan. The estimation is based on the evaluation of both suspended and bed-load sediments dynamics taking into account variation of the water level in the reservoir as affecting factor, i.e. its operation mode. The average multi-year sediment rating curve and empirical equations were corrected based on effective factors, such as time and conditions of measurement, which increased the model efficiency.