A simulation method for scour-silting simulation of sandy reservoir capacity based on virtual storage capacity correction

Abstract

The invention provides a simulation method for scouring and silting of sandy reservoir capacity based on virtual storage capacity correction, which collects river section information and terrain information in the sandy reservoir area, and constructs the topological relationship of main and tributary streams; based on the topological relationship of main and tributary streams, according to the terrain method The initial virtual storage capacity of the main stream and the tributaries with measured sections is corrected according to the storage capacity and section method storage capacity, and the initial virtual storage capacity correction is performed on the tributaries and furrows without measurement sections according to the reservoir capacity of the terrain method and the section method storage capacity; according to the sandy reservoir Calculate the sediment discharge ratio of the sandy reservoir based on the ratio of the outbound sand volume to the inbound sand volume in the reservoir area; calculate the corresponding storage capacity change caused by the erosion and sedimentation ratio according to the sediment discharge ratio, and calculate the corresponding total amount of erosion and sedimentation in the virtual reservoir; Based on the total amount of scouring and silting in the virtual reservoir, and based on the silt distribution of different elevation levels in the main stream, the corrected initial virtual storage capacity is allocated.

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

Images