City inland river peak discharge calculation method based on precipitation process theory

Abstract

The invention discloses a city inland river peak discharge calculation method based on the precipitation process theory. The method includes the step 1.1 of dividing the drainage basin of a river channel into a plurality of sub-water-catchment partitions, and the step 1.2 of calculating the situations of two magnitudes of possible maximum flow QN which may happen to the downstream portion of any number N drainage port in the river channel, comparing the magnitudes of the possible maximum flow, and taking the larger value as the peak discharge of the river channel. The step 1.1 includes the sub-step 1.1.1 of numbering each water catchment partition from the starting point to the end point of the river channel, the sub-step 1.1.2 of dividing the water outlet number corresponding to each water catchment partition, and the sub-step 1.1.3 of calculating the area, the corresponding water catchment time and flow of each water catchment partition. The city inland river peak discharge is calculated by conducting peak shifting superposition on the flow of all the drainage openings of the river channel on the basis of the precipitation process theory, and the actual flow of city inland rivers can be accurately calculated under the design standard.

Description

technical field [0001] The invention relates to the technical field of municipal engineering, in particular to a method for calculating the flood peak discharge of urban inland rivers based on the rainfall process theory. Background technique [0002] The calculation of the current urban river flow can be calculated using the two storm calculation formulas of the water conservancy department and the municipal department. The calculation formula of the water conservancy department is based on the relationship between rainfall and surface runoff of natural rivers. Due to the development of urbanization, the conditions of the underlying surface in the urban area have changed dramatically, which has affected the law of urban rainwater production and confluence, making the use of water conservancy departments The inference formula used to calculate the flood peak flow of the river under the condition of natural development cannot accurately calculate the design flow of the urban ...

AI Technical Summary

Problems solved by technology

However, if this formula is used to directly calculate the design flood peak flow of the urban flood discharge channel, the calculation result is often too large

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