Method for determining drainage flow of drainage pump station

Abstract

The invention discloses a flood drainage flow determination method of a flood drainage pump station. The method comprises the following steps: step 1, determining a flow process boundary of the upstream of a waterlogging area in a flood period and a water level process boundary of the downstream of the waterlogging area in the flood period; step 2, determining the initial adjustment water level value of the waterlogging area; calculating channel excess flow corresponding to different inland river water levels in the waterlogging area; 3, a plurality of drainage flow values are selected, and an inland river water level-inland river volume relation curve under different pump drainage flows is obtained through calculation; 4, the highest inland river water level corresponding to each drainage flow value is obtained; and 5, comprehensively considering, selecting an optimal scheme, and taking the pump drainage flow in the scheme as the drainage flow value of the drainage pump station. The invention provides an efficient and simple pump station scale design method, and the method can avoid the phenomena that waterlogging occurs in an upstream waterlogging area and a waterlogging drainage pump station at the downstream of the waterlogging area cannot run at full load in a pump station design stage.

Description

technical field [0001] The invention relates to the field of waterlogging flow scale design of a floodwater pumping station. More specifically, the present invention relates to a method for determining the drainage flow of a drainage pumping station. Background technique [0002] During the actual operation of the existing flood drainage pump stations, the water level of the river in the upstream waterlogged area is often high, causing urban waterlogging accidents, while the flood drainage pump stations downstream of the flooded area cannot discharge waterlogged at full capacity, which makes the drainage effect of the pumping station less effective. Big discount. [0003] Through the analysis of the causes, it is found that the main reason why the flood drainage pump station cannot operate according to the design flow rate is that the design stage of the flood drainage pump station often adopts the "flat lake method" to determine the design scale of the pump station. The d...

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Problems solved by technology

[0002] During the actual operation of the existing flood drainage pump stations, the water level of the river in the upstream waterlogged area is often high, causing urban waterlogging accidents, while the flood drainage pump stations downstream of the flooded area cannot discharge waterlogged at full capacity, which makes the drainage effect of the pumping station less effective. Big discount

[0003] Through the analysis of the causes, it is found that the main reason why the flood drainage pump station cannot operate according to the design flow rate is that the design stage of the flood drainage pump station often adopts the "flat lake method" to determine the design scale of the pump station. The drainage facilities are integrated as a whole, and the drainage process of the entire water system is calculated according to the water balance formula. This method can accurately calculate the stagnation and storage characteristics of the river channel and the peak-shaving effect, but this method does not consider the flow of water bodies. When the waterlogging area and the pumping station When the flow capacity of the connected rivers between them is insufficient, the phenomenon that the pumping station cannot discharge waterlogging at full capacity will occur.

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