CN109614588A - A kind of sponge city annual flow controls the calculation method of lower runoff coefficient - Google Patents
A kind of sponge city annual flow controls the calculation method of lower runoff coefficient Download PDFInfo
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- CN109614588A CN109614588A CN201811535717.0A CN201811535717A CN109614588A CN 109614588 A CN109614588 A CN 109614588A CN 201811535717 A CN201811535717 A CN 201811535717A CN 109614588 A CN109614588 A CN 109614588A
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- 238000004364 calculation method Methods 0.000 title claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 10
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- 238000010586 diagram Methods 0.000 description 8
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
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Abstract
The invention discloses the calculation methods that a kind of sponge city annual flow controls lower runoff coefficient, rainfall data that are collected and recording are divided into grade, the number that statistics rainfall occurs in different brackets, is denoted as the frequency of the grade, and rainfall grade-frequency distribution is expressed as linear relationship；Calculate the return period T of precipitation；The frequency is normalized, is the relational graph of both precipitation probability draftings using abscissa as return period, ordinate then according to the return period of each grade rainfall and the relationship of calculating frequency repetition period of rainfall and precipitation probability；Curve is fitted after reference axis unit is normalized, and the formula after fitting is integrated, integrating obtained area is the runoff coefficient under the ground sponge urban construction.Algorithm operating of the invention is more simple, understandable；Calculated result has regional characteristics, and accuracy is high；The algorithm has universality, and the sponge urban construction of different geographical is applicable.
Description
Technical field
The present invention relates to the urban runofves in environmental project to slow down effectiveness factors control technology field, more particularly to one kind
Sponge urban runoff overall control rate controls the calculation method of lower runoff coefficient.
Background technique
As urbanization process is constantly accelerated, Regional Hydrologic balance is destroyed, shortage of water resources, urban waterlogging and rainwater
The problems such as precontamination, becomes increasingly conspicuous.In urban construction, as waterproof region area increases, run-off increases, it will lead to
Flooded conditions are more serious.Urban runoff total amount is effectively controlled, it is possible to reduce diameter brought by rain drop erosion earth's surface
Stream and pollution.The integrality of city function and the safety of life of urban resident have been ensured to a certain extent.It is economical meeting
On the basis of social benefit, urban waterlogging, the generation of pollution load of overflow etc. are reduced.
The present invention opens local sponge city by the analysis and calculating to survey region locality rainfall historical statistical data
The runoff coefficient of hair construction is advised value.
Summary of the invention
To solve problem above of the existing technology, the invention proposes a kind of sponge city annual flows to control lower runoff
The calculation method of coefficient realizes the method for solving its runoff coefficient according to the history precipitation data of sponge urban construction locality.
A kind of sponge city annual flow of the invention controls the calculation method of lower runoff coefficient, and this method includes following step
It is rapid:
Rainfall data that are collected and recording are divided into grade, the number that statistics rainfall occurs in different brackets, note
For the frequency of the grade, rainfall grade-frequency is distributed possessed linear relationship and is expressed as follows formula:
Ln (N)=60623028-0.9906966 × D
Wherein, N is the appearance frequency of different rainfall grades, and D is rain estimation；
The return period T of precipitation is calculated, i.e.,
Wherein, P is the grade precipitation probability of occurrence；
The frequency is normalized, then according to the return period of each grade rainfall and calculating frequency repetition period of rainfall and drop
The relationship of water probability is the relational graph of both precipitation probability draftings using abscissa as return period, ordinate；
Reference axis unit is normalized, curve is fitted, and the formula after fitting is integrated, integrates institute
Obtained area is the runoff coefficient under the ground sponge urban construction.
Compared with prior art, the invention has the following advantages that
1, algorithm operating of the invention is more simple, understandable；
2, calculated result has regional characteristics, and accuracy is high；
3, the algorithm has universality, and the sponge urban construction of different geographical is applicable.
4, it can indirectly diameter flow control be polluted while control annual flow, reduce urban waterlogging, reduce water
Body pollution.
Detailed description of the invention
Relation schematic diagram of the Fig. 1 between Tianjin storm recurrence period and the frequency of the invention；
Graph of relation of the Fig. 2 between Tianjin storm recurrence period and probability；
Fig. 3 is matched curve and equation schematic diagram；
Fig. 4 is the calculation method overall flow schematic diagram that a kind of sponge city annual flow of the invention controls lower runoff coefficient.
Specific embodiment
A specific embodiment of the invention is described in further detail below in conjunction with attached drawing.
Technical solution of the present invention the following steps are included:
1, certain sponge urban construction region is chosen, collects and arranges its history annual rainfall data；
2, history rainfall data are analyzed and is calculated, obtain the relationship of return period and frequency distribution.
3, the frequency is normalized, obtains the relationship of repetition period of rainfall and precipitation probability.
It 4, is the relational graph of both precipitation probability draftings by return period ordinate of abscissa.
5, coordinate unit is normalized, obtains return period and probability * runoff coefficient/return period relational graph.
6, curve is integrated, obtains integral equation and integral area, integrating obtained area is the ground sponge
Runoff coefficient under urban construction.
The heavy rain distribution of grades feature of Tianjin urban areas over 80 years analyzed, heavy rain grade is drawn with intra day ward
Point, it divides for convenience, by the rainfall of record according to 25mm level-one, is divided into 7 grades.To Tianjin meteorological observatory 1918-
The daily rainfall data in 5-10 month is counted between 1998, is obtained the number that statistics rainfall occurs in different brackets, is denoted as
The frequency of the grade.After the frequency is taken logarithm, it can be deduced that it is in a linear relationship between the logarithm and rainfall grade of the frequency, and phase
Relationship number is higher.This kind of linear relationship is expressed as follows with rainfall grade-frequency distribution:
Ln (N)=60623028-0.9906966 × D
In formula, N is the appearance frequency of different rainfall grades, and D is rain estimation.
The return period of precipitation is usually the inverse of grade precipitation probability of occurrence P, i.e.,
The return period of each grade rainfall in Tianjin can be calculated using above formula and calculates the frequency.It calculates
Tianjin heavy rain grade and the frequency distribution, as shown in table 1:
Table 1
As shown in Figure 1, the relation schematic diagram between Tianjin storm recurrence period and the frequency.The schematic diagram is according to table 1
In heavy rain grade and frequency distributed data draw out the histogram of the relationship between Tianjin storm recurrence period and the frequency.
As shown in Fig. 2, for the relation schematic diagram between Tianjin storm recurrence period and probability.The schematic diagram is to rainfall
The relationship column diagram obtained between return period and rainfall probability is normalized in the frequency.
After being simulated to the different reoccurrence of rainfall by Infoworks ICM, corresponding related coefficient is obtained, through counting
Obtained Tianjin storm recurrence period and related coefficient, as shown in table 2:
Table 2
For the equation unit after integral is turned to 1, therefore ordinate is set as probability * runoff coefficient/return period, abscissa
It is set as the return period.Due to the return period after 2.103a Y value all very littles, therefore ignore herein.By processing
Obtain curve matched curve as shown in Figure 3 and equation.It is integrated to obtain equation: y=0.0233/-0.838x-
0.838, integral area 0.16502.Curve approximation between return period 0-0.1077a is close by integral area in linear function
It is seemingly 0.07916.Now two parts area is summed it up to obtain total mark area to be 0.24418, i.e., under above-mentioned condition, runoff coefficient
It should be less than 0.244.
The above description is only an embodiment of the present invention, is not intended to limit the invention, all within principle of the invention, institute
Any modification, equivalent substitution, improvement and etc. of work, should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of sponge city annual flow controls the calculation method of lower runoff coefficient, feature exists, method includes the following steps:
Rainfall data that are collected and recording are divided into grade, the number that statistics rainfall occurs in different brackets is denoted as this
Rainfall grade-frequency is distributed possessed linear relationship and is expressed as follows formula by the frequency of grade:
Ln (N)=60623028-0.9906966 × D
Wherein, N is the appearance frequency of different rainfall grades, and D is rain estimation；
The return period T of precipitation is calculated, i.e.,
Wherein, P is the grade precipitation probability of occurrence；
The frequency is normalized, it is then general according to the return period of each grade rainfall and calculating frequency repetition period of rainfall and precipitation
The relationship of rate is the relational graph of both precipitation probability draftings using abscissa as return period, ordinate；
Reference axis unit is normalized, curve is fitted, and the formula after fitting is integrated, obtained by integral
Area be runoff coefficient under the ground sponge urban construction.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111199345A (en) * | 2019-12-27 | 2020-05-26 | 河北建筑工程学院 | Measuring and calculating method for design rainfall of sponge city and terminal equipment |
| CN113343806A (en) * | 2021-05-26 | 2021-09-03 | 深圳数研锦瀚智慧科技有限公司 | Runoff coefficient determining method, device, terminal and storage medium |
| CN113435626A (en) * | 2021-05-26 | 2021-09-24 | 同济大学 | Runoff frequency spectrum similarity calculation method for quantifying sponge effect and application thereof |
| CN117196135A (en) * | 2023-08-24 | 2023-12-08 | 北京市市政工程设计研究总院有限公司 | Method and device for adjusting medium diameter flow control rate of sponge city |
-
2018
- 2018-12-14 CN CN201811535717.0A patent/CN109614588A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111199345A (en) * | 2019-12-27 | 2020-05-26 | 河北建筑工程学院 | Measuring and calculating method for design rainfall of sponge city and terminal equipment |
| CN111199345B (en) * | 2019-12-27 | 2023-07-11 | 河北建筑工程学院 | Method for measuring and calculating design rainfall of sponge city and terminal equipment |
| CN113343806A (en) * | 2021-05-26 | 2021-09-03 | 深圳数研锦瀚智慧科技有限公司 | Runoff coefficient determining method, device, terminal and storage medium |
| CN113435626A (en) * | 2021-05-26 | 2021-09-24 | 同济大学 | Runoff frequency spectrum similarity calculation method for quantifying sponge effect and application thereof |
| CN117196135A (en) * | 2023-08-24 | 2023-12-08 | 北京市市政工程设计研究总院有限公司 | Method and device for adjusting medium diameter flow control rate of sponge city |
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Application publication date: 20190412 |