Method for determining flood control high water level of sandy river reservoir based on high-beach high tank

Abstract

The invention provides a method for determining flood control high water level of a sandy river reservoir based on a high-beach high tank. The method comprises the following steps: collecting hydrological data related to design calculation preparation; judging whether the target river belongs to a sandy river or not according to the collected hydrological data; if yes, designing and calculating the high-beach high-groove form corresponding to sediment deposition at the bottom of the reservoir, and the high-beach high-groove form comprises a longitudinal section form and a cross section form; the determining flood control reservoir capacity of the reservoir according to the reservoir design flood process line and the discharge flow process line; calculating the reservoir capacity of the reservoir based on the designed and calculated high-beach and high-trough form; drawing a water level reservoir capacity curve according to the calculated reservoir capacity; and determining the water level corresponding to the flood control reservoir capacity as the flood control high water level according to the water level reservoir capacity curve. According to the technical scheme, the flood control high water level can be conveniently determined according to the reservoir sediment deposition state, namely the high-beach high-trough form.

Description

technical field [0001] The invention relates to the technical field of water levels of sandy river reservoirs, in particular to a method for determining the flood control high water level of sandy river reservoirs based on high beaches and high troughs. Background technique [0002] According to the "China Water Conservancy Statistical Yearbook", the number of reservoirs in my country is gradually increasing. As of 2019, my country has built about 98,000 reservoirs of various types, with a total storage capacity of about 900 billion m 3 , effectively improved the ability to protect against floods and droughts, exerted huge comprehensive benefits, and made important contributions to my country's economic and social development. Most of the rivers in northern my country are sandy rivers. Due to the interception of the reservoir, the water flow velocity in the reservoir is reduced, and a large amount of sediment is deposited at the bottom of the reservoir, resulting in a reduct...

AI Technical Summary

Problems solved by technology

Therefore, the storage capacity of the reservoir calculated based on the flood control limit water level is too small, and the resulting flood control level line may be too low, which will be a huge safety hazard for floodplain residents

In order to solve this problem, a large number of researchers have optimized sand discharge methods from the perspective of sediment discharge to reduce sediment deposition and restore the effective storage capacity of the reservoir. However, there are few studies on the impact of sediment deposition in sandy rivers on reservoir water level design.

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