Dynamics of sediment formation in natural lakes and reservoirs

¹ Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, National Research University, 100000 Tashkent, Uzbekistan
² Tashkent institute of finance, A.Temur Street 60A, 100000 Tashkent, Uzbekistan

^* Corresponding author: Shaymardanovsamandar6@gmail.com

Abstract

The rate of deposition of sediments in the water flow has a great influence on the flow carrying capacity, service life and coefficient of useful work of natural channels. In addition, precipitation and land use change lead to the acceleration of the erosion process and directly affects the rate of sedimentation of the umbilical cord. In this literature, attention was paid to studies analyzing the factors influencing the volume of water storage in reservoirs and natural lakes. 14 studies found an increase in the rate of sediment deposition and 13 found a decrease. 83.3% of the articles studied studied natural lakes and found a recent increase in sedimentation, including 54.5% of the articles on impoundment reservoirs reported a recent increase in sedimentation. determined to decrease. Land use change has been cited as the main cause of the increase in sediments, and climate change has also had a significant impact. In 44% of the reviewed articles, it was found that reservoirs and canals are losing their water intake capacity as a result of the increase in sediments, resulting in siltation. In the following studies, it was found that as a result of increased sedimentation, the process of silting in canals and water storage structures increases significantly and they lose their capacity to carry water.