Virtual reservoir capacity correction-based reservoir capacity scouring and silting simulation method for sediment-laden reservoir

Abstract

The invention provides a virtual reservoir capacity correction-based reservoir capacity erosion and deposition simulation method for a sand-rich reservoir, and the method comprises the following steps: acquiring river cross section information and topographic information of a sand-rich reservoir area, and constructing a trunk and branch topological relation; carrying out initial virtual reservoircapacity correction on the main stream reservoir capacity and the branch stream with the measurement section according to the topographic method reservoir capacity and the section method reservoir capacity based on the main stream and branch stream topological relation, and carrying out initial virtual reservoir capacity correction on the branch stream and the furrow without the measurement section according to the topographic method reservoir capacity and section method reservoir capacity difference value; according to the ratio of the reservoir-out sand amount to the reservoir-in sand amountof the reservoir area of the sand-rich reservoir, calculating the sediment discharge ratio of the sand-rich reservoir; calculating the corresponding reservoir capacity change caused by the erosion and deposition change according to the sediment discharge ratio, and calculating the corresponding total erosion and deposition amount of the virtual reservoir; and distributing the corrected initial virtual reservoir capacity based on the total amount of erosion and deposition of the virtual reservoir and based on sludge distribution of different elevation levels of the main stream.

Description

technical field [0001] The invention relates to the technical field of sandy river reservoir engineering sediment, in particular to a sandy reservoir storage capacity scour-silting simulation method based on virtual storage capacity correction. Background technique [0002] The shape of the natural river reservoir area is complex, and the tributaries and furrows occupy a certain proportion of the reservoir capacity. The distribution of tributaries and furrows is as follows: figure 1 shown. There are many tributaries on both sides of the Guxian Reservoir area, and the drainage area is greater than 1000km 2 There are 7 tributaries entering the Yellow River, and the storage capacity of the main stream below 640m is 13.527 billion m 3 , tributary storage capacity 21.67m 3 , tributary storage capacity accounted for 13.8% of the total storage capacity. There are many tributary ditches on both sides of the Heishanxia Reservoir area. There are 25 big and small tributary ditches,...

AI Technical Summary

Problems solved by technology

However, both methods have problems. The correction of section distance changes the length of the river, and the correction of width changes the width of the river. Both have large errors. Eliminating one error brings another error at the same time. These methods are not very good. problem solving

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