A method for determining the high water level for flood control of sandy river reservoirs based on high beaches and high troughs

Abstract

The invention provides a method for determining the flood control high water level of sandy river reservoirs based on high beaches and high troughs, comprising the following steps: collecting hydrological data related to preparation and design calculation; judging whether the target river belongs to sandy rivers according to the collected hydrological data If it belongs to, design and calculate the form of the high beach and high trough corresponding to the sediment deposition at the bottom of the reservoir. The high beach and high trough form includes: longitudinal section form and cross section form; The flood control storage capacity of the reservoir; the reservoir storage capacity of the reservoir is calculated based on the high beach and high trough form calculated by design; the water level storage capacity curve is drawn according to the calculated reservoir storage capacity; the water level corresponding to the flood control storage capacity is determined according to the water level storage capacity curve is Flood protection high water level. This technical scheme is convenient for determining the high water level for flood control according to the sedimentation state of the reservoir, that is, the shape of high beach and high trough.

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...

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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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