Abstract
In the Bostanlyk district of the Tashkent region, there are high-mountain breakthrough lakes located in the Pskem and Koksu rivers basin, which pose a particular danger to the downstream territories. The river system of the basins of the Pskem and Koksu rivers located in the Tashkent region is characterized by the presence of many nodes of a confluence of tributaries that form the hydrographic network of the basins of the high-mountain rivers under consideration. In the event of man-made and natural emergencies, a breakthrough wave can form on high-mountain outburst-hazardous lakes. The main purpose of these studies is to develop a method for the hydraulic calculation to determine the depths of flows in the confluence nodes. Based on the use of the law of conservation of momentum, a model and method for calculating the junction of open water streams have been developed. To determine the depth h2 in the main channel after the confluence point, we recommend using the well-known hydraulic methods for determining the depth of water in open channels. Determination of the depths h1 and h0 of the main flow and inflow, respectively, can be analytically obtained based on the obtained dependences (9) and (10).
Highlights
It should be noted that at present, there is the most intensive development for construction and cultivation of crops in the coastal zones of high-mountain rivers, which are susceptible to flooding when the high-mountain lakes and reservoirs located above them burst, in particular, in the Bostanlyk district of the Tashkent region
The river system of the basins of the Pskem and Koksu rivers located in the Tashkent region is characterized by the presence of many nodes of the confluence of tributaries, which form the hydrographic network of the basins of the considered high-mountain rivers
According to the studies carried out by many authors, the depth h2 is established in the channel after the confluence, which is determined only by the flow regime available here
Summary
It should be noted that at present, there is the most intensive development for construction and cultivation of crops in the coastal zones of high-mountain rivers, which are susceptible to flooding when the high-mountain lakes and reservoirs located above them burst, in particular, in the Bostanlyk district of the Tashkent region. The river system of the basins of the Pskem and Koksu rivers located in the Tashkent region is characterized by the presence of many nodes of the confluence of tributaries, which form the hydrographic network of the basins of the considered high-mountain rivers. To determine the flooding zones during the breakthrough of high-mountain lakes, it is necessary to consider all the above phenomena and find out the nature of the change in the flow depth at the confluence nodes [6–27]. The main purpose of these studies is to develop a method for the hydraulic calculation to determine the depths of flows in the confluence nodes
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