A method for calculating river channel safety leakage influenced by jacking of downstream lakes

Abstract

The invention discloses a method for calculating river channel safety leakage influenced by jacking of downstream lakes. The method comprises steps of by acquiring riveway water level, riverway flow and downstream lake water level data, determining an edge probability distribution function, constructing a joint probability distribution function of the river channel water level, the river channel flow and the downstream lake water level by utilizing a Copula function, further deducing a conditional probability distribution function of the river channel water level when the river channel flow and the downstream lake water level are given, and on this basis, deducing the river channel safety leakage influenced by the jacking of the downstream lake. An objective quantitative method is providedfor calculation of the river channel safety discharge influenced by jacking of the downstream lake, the statistical theory basis is high, the internal interaction relation between the river channel water level, the river channel flow and the downstream lake water level can be accurately captured, randomness of a traditional experience method can be reduced, and the design result precision and quality are improved.

Description

technical field [0001] The invention belongs to the field of flood control and dispatching of water conservancy projects, in particular to a method for calculating the safe discharge of a river channel affected by the jacking up of a downstream lake. Background technique [0002] The safe discharge capacity of the river channel refers to the maximum flow that can be safely released by the embankment of the river channel when the water level is guaranteed. It is an important basis for formulating flood control engineering measures and carrying out flood control dispatching. Usually, according to the requirements of economic and social development, the flood control standard of the embankment is selected, and then the guaranteed water level of the river dike is determined, and then the safe discharge of the river channel corresponding to the guaranteed water level is calculated through the water level and flow relationship curve, among which the correct formulation of the water...

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Problems solved by technology

At present, there is no literature that introduces the Copula function into the calculation of the safe discharge of the river channel affected by the jacking of the downstream lake.

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