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Waterlogging storage water surface rate partition processing method based on urban waterlogging basic information

A technology for partition processing and basic information, applied in complex mathematical operations, climate change adaptation, etc., can solve problems such as heavy workload, small discharge-storage ratio, and insufficient number of schemes, and achieve simple calculation process, reduced workload, and improved timeliness sexual effect

Active Publication Date: 2021-01-29
NANCHANG INST OF TECH
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AI Technical Summary

Problems solved by technology

The conventional average exclusion method that does not consider the process of rain and flood has shortcomings in practical application: because it is only based on the water balance of the total period of design rainfall, if the design rainfall lasts for a long time, the calculation results obtained are difficult to adapt to concentrated heavy rainfall; The waterlogging surface rate is high, and the calculated drainage-storage ratio is too small to meet the normal drainage needs
In practice, it often needs to be realized through calculation methods such as comprehensive unit line and water balance based on the rain and flood process, but the workload of multi-scenario adjustment is huge, and in general, the number of adjusted solutions is insufficient, and the representativeness is also low. bad

Method used

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  • Waterlogging storage water surface rate partition processing method based on urban waterlogging basic information
  • Waterlogging storage water surface rate partition processing method based on urban waterlogging basic information
  • Waterlogging storage water surface rate partition processing method based on urban waterlogging basic information

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Embodiment example 1

[0133] As shown in Table 1 below, according to the conventional "average exclusion method" (24h rainstorm), the drainage flow under different scenarios is calculated, that is, the initial drainage flow. With the increase of the storage water surface rate, the drainage flow gradually decreases. When it is further reduced, even more negative values ​​appear. For example, when the water surface rate is 5%, the rainstorm lasts for 3 hours, and the design flow rate is 17.14, and the net flood increase in the next 3 hours cannot be ruled out, then this situation is no longer applicable Conventional "mean exclusion".

[0134] Table 1 Design drainage flow (once in 20 years) under different drainage scenarios (unit: m 3 / s)

[0135]

[0136] As shown in Table 2 below, by adopting the processing method of urban water conservancy drainage information proposed by the embodiment of the present invention, the drainage flow in any scenario can be calculated. At the same time, with the g...

Embodiment example 2

[0167] The difference between this embodiment and the implementation case one lies in the rain type, t max . It is also to illustrate that "calculation results of design parameters and partitions" has nothing to do with the rain pattern of the structure; it is only related to the statistical results of rainfall and the input t max and other territorial factors (t max It has regional characteristics and is related to the local tolerance to waterlogging). This embodiment will introduce the differences from the first implementation case, and the same parts will not be repeated here. In this example, it is assumed that the region has a stronger tolerance to waterlogging, and t max If it is set to 72h, that is, "3 days of heavy rain and 3 days of net discharge (free up all storage capacity)", the specific partition thresholds obtained will also be different. In addition, another rain pattern (composite rain pattern) is used to test whether the basic law of its drainage process ...

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Abstract

The invention discloses a waterlogging storage water surface rate partition processing method based on urban waterlogging basic information. The method comprises the steps that basic information suchas rainfall runoff coefficients, main duration rainfall statistical results and current water surface rates, input by a user, of a current region is acquired; obtaining a designed flood drainage flowaccording to the basic information and the rainfall flood process control information; obtaining a designed regulation and storage water depth according to the designed drainage flow and the basic information; obtaining a corresponding designed rainstorm duration according to the designed flood drainage flow or the designed regulation and storage water depth; designing rainstorm duration accordingto the designed flood drainage flow to obtain partition indexes; zoning threshold delimiting is conducted on the waterlogging storage water surface rate of the current region through zoning indexes,and a region division result is obtained; and outputing results of zone partition. According to the processing method, the calculation process can be simplified, the workload of multi-scenario adjustment is reduced, and the operability is high; and the design scheme of the urban flood drainage system can be optimized according to local conditions in combination with the partitioning result of theurban water surface rate.

Description

technical field [0001] The invention relates to the technical field of urban planning, in particular to a method for partitioning waterlogging storage water surface ratio based on urban waterlogging basic information. Background technique [0002] In urban water conservancy system planning or capacity review, it is often necessary to design schemes by setting different combinations of water surface rates and rainstorm durations. The conventional average exclusion method is a method that is often used. The conventional average exclusion method that does not consider the process of rain and flood has shortcomings in practical application: because it is only based on the water balance of the total period of design rainfall, if the design rainfall lasts for a long time, the calculation results obtained are difficult to adapt to concentrated heavy rainfall; The waterlogging surface rate is high, and the calculated drainage-storage ratio is too small to meet the normal drainage ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10
CPCG06F17/10Y02A10/40
Inventor 唐明周涵杰许文涛
Owner NANCHANG INST OF TECH
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