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Method for determining drainage flow of drainage pump station

A technology for determining methods and drainage volumes, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as discounted drainage effects of pumping stations, urban waterlogging accidents, and unaccounted for water flow

Pending Publication Date: 2022-05-13
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for determining drainage flow of drainage pump station
  • Method for determining drainage flow of drainage pump station
  • Method for determining drainage flow of drainage pump station

Examples

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Embodiment 1

[0041] One embodiment of the present invention provides a method for determining the drainage flow rate of a drainage pumping station, comprising the following steps:

[0042] Step 1. Confirm the flow process boundary of the upstream of the flooded area during the flood period and the water level process boundary of the downstream of the flooded area during the flood period;

[0043] Step 2. Determine the water level value of the inland river in the flooded area before the rainfall, that is, the starting water level value; calculate the corresponding channel flow under different inland river water levels in the flooded area;

[0044] Step 3: Select a number of drainage flow values, and calculate the different flow rates according to the water level values ​​of the inland river, the water level values ​​of the outer river, and the corresponding channel flow rates under different inland river water levels, combined with the gate discharge flow, pump discharge flow, and net rain f...

Embodiment 2

[0070] 1. Determine the drainage area of ​​0.83km 2 , the length of the river is 0.55km, according to the flood control and drainage plan, the drainage standard of this area is 20 years.

[0071] Working conditions: The design flood in the inner river meets the once-in-200-year flood tide level in the outer river.

[0072] 2. In order to ensure the water landscape of the river full of water and clear water, and at the same time ensure the drainage safety of the river basin, the minimum water level of the landscape is set to be 0.8m. Determine the water level value of the inland river in the flooded area before the rainfall, that is, the starting water level value, which is the aforementioned landscape low water level of 0.8m;

[0073] 3. Use the formula for the flow capacity of the drainage channel to calculate the corresponding flow rate of the channel under different inland river water levels in the flooded area:

[0074] Table 1 Corresponding river drainage capacity of di...

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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...

Claims

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Application Information

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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 何用王斌王建平肖梓明黄春华张金明吕文斌刘永安陈汝荣叶智豪张艳艳余陈颖妮黄代忠廖志颖杨志国
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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