CN108280792A - Design storm flood same frequency assumes the method for inspection under a kind of changing environment - Google Patents
Design storm flood same frequency assumes the method for inspection under a kind of changing environment Download PDFInfo
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- 238000013461 design Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000007689 inspection Methods 0.000 title claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 238000004458 analytical method Methods 0.000 claims abstract description 10
- DMLAVOWQYNRWNQ-UHFFFAOYSA-N azobenzene Chemical class C1=CC=CC=C1N=NC1=CC=CC=C1 DMLAVOWQYNRWNQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 235000008434 ginseng Nutrition 0.000 description 1
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Abstract
The invention belongs to storm flood same frequencys to assume inspection technology field, storm flood same frequency is designed under especially a kind of changing environment assumes the method for inspection, the problem of being difficult to set up for the hypothesis of heavy rain and flood same frequency, it is proposed that following scheme includes the following steps：Choosing any region is used as band to examine region, nomogram table is looked by storm runoff or hydrologic manual looks into the design storm for calculating and counting the region and lasting, it converts the design storm that the region is lasted to any design storm lasted by rainfall formula, storm sampling is carried out from the design storm lasted, is calculated using the heavy rain of sampling.The present invention chooses typical heavy rain, and analysis comparison is carried out with actual measurement torrential rain or neighbouring area and heavy rain the biggest in the world record by typical heavy rain and design storm, inquire into flood by push pull azobenzene compounds, examine whether the hypothesis of storm flood same frequency corresponds to, it improves storm flood same frequency and assumes the probability of success, convenient for accurately being made a reservation for flood damage.
Description
Technical field
The present invention relates to storm flood same frequencys to assume to design cruelly under inspection technology field more particularly to a kind of changing environment
Rain flood same frequency assumes the method for inspection.
Background technology
Flow data Derivation Design flood is most direct, and precision is also higher.But it in following several situations, then must be provided by heavy rain
Expect Derivation Design flood, i.e.,：1. design insufficient basin measured discharge data or shortage；2. mankind's activity destroys flood series
Consistency；3. it is required that a variety of methods, corroborate each other, reasonable selection；4. PMP and Design Flood for Small Watershed are often pushed away with rain data
It asks.
Flood and heavy rain same frequency, i.e., the heavy rain of a certain frequency just generate the flood of a certain frequency.Such as a-hundred-year is sudden and violent
Rain, just generates once-in-a-century flood, and the method and step by rain data Derivation Design flood is：1. storm sampling；2. inquiring into
Design storm；3. Derivation Design net rainfall；4. Calculating Design Flood Hydrograph, but the hypothesis of actually heavy rain and flood same frequency exists
It is invalid in most cases, especially under conditions of environmental change, it is therefore desirable to sudden and violent to being designed under changing environment
Rain flood same frequency, which assumes to examine, tests, in order to accurately be made a reservation for flood damage.
Invention content
The technical issues of hypothesis based on heavy rain and flood same frequency is difficult to set up, the present invention proposes a kind of changing environment
Lower design storm flood same frequency assumes the method for inspection.
Storm flood same frequency is designed under a kind of changing environment proposed by the present invention assumes the method for inspection, including following step
Suddenly：
S1：Choosing any region is used as band to examine region, looks into nomogram table by storm runoff or hydrologic manual looks into calculation statistics
The design storm that the region is lasted；
S2：It converts the design storm that the region is lasted to any design storm lasted by rainfall formula；
S3：Storm sampling is carried out from the design storm lasted, is calculated using the heavy rain of sampling；
S4：Judge whether storm sampling data belongs to extra torrential rain, by the return period of river flood investigation extra torrential rain,
And combine documenting analysis estimation of the Regional History document in relation to the condition of a disaster data；
S5：Check that statistical parameter, design storm last longer, mean valueIncrease, CVBecome smaller, a certain design value x lastedP
Increase；
S6：The storm frequency curve that region statistics is lasted is painted on a figure and is compared and analyzed；
S7：Analysis comparison is carried out with actual measurement torrential rain or neighbouring area and heavy rain the biggest in the world record, checks that design is sudden and violent
The dilute chance degree of rain；
S8：The design storm amount lasted from the region chooses typical heavy rain, using homogenous frequency enlargement method to typical heavy rain mistake
Journey and the canonical process of design flood are amplified；
S9：By push pull azobenzene compounds, Derivation Design flood is calculated by typical heavy rain and design storm, examines the heavy rain big vast
Whether the hypothesis of water same frequency succeeds.
Preferably, rainfall formula is in the S2：Qy=Ψ qF, wherein Qy are design rainwater flow, and q is that heavy rain is strong
Degree, F is catchment area.
Preferably, the region difference is independently chosen in the S3 last most torrential rain amount and counted, and be converted to not
Mean storm intensity~duration curve of same frequency, expression formula are：Wherein t is storm duration, i
To be lasted for t, the maximum mean storm intensity that frequency is P, SPFor rain power, n is heavy rain damped expoential, and d is inspection parameter..
Preferably, when the region counts the storm frequency Drawing of Curve lasted in the S6, it should be noted that the heavy rain respectively lasted
Frequency curve cannot intersect, and the spacing of the storm frequency Drawing of Curve respectively lasted is moderate.
Preferably, the S7 selects the efficiency of the efficient heavy rain in neighbouring area to think to have reached possible maximum, i.e. η=ηm, therefore set
Meter basin probable maximum storm Pm beThe exemplary potent that wherein P, W are respectively transplanted is sudden and violent
The rainfall and precipitable water of rain, WmTo design the possibility maximum precipitable water of region.
Preferably, push pull azobenzene compounds calculation formula is as follows in the S9：
Wherein F, L, J are drainage characteristics parameter, SP, n be Rainstorm Feature parameter, produce confluence parameter.
Having the beneficial effect that in the present invention：The present invention can choose different geographical last heavy rain by the region last heavy rain turn
It is changed to any design storm lasted, chooses typical heavy rain, and pass through typical heavy rain and design storm and actual measurement torrential rain or neighbour
Near-earth area and heavy rain the biggest in the world record carry out analysis comparison, inquire into flood by push pull azobenzene compounds, examine storm flood same
Whether frequency hypothesis corresponds to, and can improve storm flood same frequency and assume the probability of success, accurate convenient for being carried out to flood damage
It is predetermined.
Description of the drawings
Fig. 1 is the flow knot that design storm flood same frequency assumes the method for inspection under a kind of changing environment proposed by the present invention
Structure schematic diagram.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1, embodiment 1, design storm flood same frequency assumes the method for inspection under a kind of changing environment, including following
Step：
S1：Choosing any region is used as band to examine region, looks into nomogram table by storm runoff or hydrologic manual looks into calculation statistics
The design storm that the region is lasted；
S2：It converts the design storm that the region is lasted to any design storm lasted by rainfall formula；
S3：Storm sampling is carried out from the design storm lasted, is calculated using the heavy rain of sampling；
S4：Judge whether storm sampling data belongs to extra torrential rain, by the return period of river flood investigation extra torrential rain,
And combine documenting analysis estimation of the Regional History document in relation to the condition of a disaster data；
S5：Check that statistical parameter, design storm last longer, mean valueIncrease, CVBecome smaller, a certain design value x lastedP
Increase；
S6：The storm frequency curve that region statistics is lasted is painted on a figure and is compared and analyzed；
S7：Analysis comparison is carried out with actual measurement torrential rain or neighbouring area and heavy rain the biggest in the world record, checks that design is sudden and violent
The dilute chance degree of rain；
S8：The design storm amount lasted from the region chooses typical heavy rain, using homogenous frequency enlargement method to typical heavy rain mistake
Journey and the canonical process of design flood are amplified；
S9：By push pull azobenzene compounds, Derivation Design flood is calculated by typical heavy rain and design storm, examines the heavy rain big vast
Whether the hypothesis of water same frequency succeeds.
In the present invention, rainfall formula is：Qy=Ψ qF, wherein Qy are design rainwater flow, and q is storm intensity, and F is
Catchment area.
It in the present invention, independently chooses the region difference and lasts most torrential rain amount and counted, and be converted to different frequency
Mean storm intensity~duration curve, expression formula is：Wherein t is storm duration, and i is to last
The maximum mean storm intensity for being P for t, frequency, SPFor rain power, n is heavy rain damped expoential, and d is inspection parameter.
In the present invention, when which counts the storm frequency Drawing of Curve lasted, it should be noted that the storm frequency respectively lasted is bent
Line cannot intersect, and the spacing of the storm frequency Drawing of Curve respectively lasted is moderate.
In the present invention, the efficiency of the efficient heavy rain in neighbouring area is selected to think to have reached possible maximum, i.e. η=ηm, therefore design stream
The probable maximum storm Pm in domain isWherein P, W are respectively the exemplary potent heavy rain being transplanted
Rainfall and precipitable water, WmTo design the possibility maximum precipitable water of region.
Push pull azobenzene compounds calculation formula is as follows in the present invention：
Synthesis design flow Qm, and corresponding watershed concentration time τ can be acquired
Wherein F, L, J are drainage characteristics parameter, SP, n be Rainstorm Feature parameter, produce confluence parameter.
Calculation method is：
1. by being investigated to design basin, in conjunction with hydrologic manual and watershed unit figure, the geometric properties in basin are determined
Value F, L, J, the parameter n (or n1, n2) in the statistical parameter (mean value, CV, Cs/CV) and rainfall formula of design storm, loss ginseng
Number μ and confluence parameter m.
2. calculating Sp, xTP of design storm, and then design net rainfall is calculated by loss parameter μ and lasts tc.
3. F, L, J, tc, m are substituted into formula (2-8-1), (2-8-2) and (2-8-3), wherein only remaining Qm, τ are unknown, therefore can
It solves.
4. being solved with trial and error procedure.A Qm is first set, formula (2-8-3) is substituted into and obtains a corresponding τ, by it compared with tc,
Which kind of confluence situation judgement belongs to, then the τ values are substituted into formula (2-8-1) or formula (2-8-2), and acquires a Qm, if with hypothesis
Consistent (error be no more than 1%), then the Qm and τ is required；Otherwise, separately set Qm and imitate above step tentative calculation, until two formulas all
Until capable of meeting jointly.
Design is lasted for 7 days in S5, with 1 day, 3 it is heaven-made last in order to control, times magnification than calculating formula be：
It is 1 day maximum:
Remaining 2 days in 3 days maximum:
Remaining 4 days in 7 days maximum:
In formula, x1p、x3pAnd x7pRespectively 1d, 3d and 7d design storm amount (mm)；x1、x3And x7Respectively 1d, 3d and 7d
Typical storm rainfall (mm).
Embodiment 2, design storm flood same frequency assumes the method for inspection under a kind of changing environment, includes the following steps：
S1：Choosing any region is used as band to examine region, looks into nomogram table by storm runoff or hydrologic manual looks into calculation statistics
The design storm that the region is lasted；
S2：It converts the design storm that the region is lasted to any design storm lasted by rainfall formula；
S3：Storm sampling is carried out from the design storm lasted, is calculated using the heavy rain of sampling；
S4：Judge whether storm sampling data belongs to extra torrential rain, by the return period of river flood investigation extra torrential rain,
And combine documenting analysis estimation of the Regional History document in relation to the condition of a disaster data；
S5：Check that statistical parameter, design storm last longer, mean valueIncrease, CVBecome smaller, a certain design value x lastedP
Increase；
S6：The storm frequency curve that region statistics is lasted is painted on a figure and is compared and analyzed；
S7：Analysis comparison is carried out with actual measurement torrential rain or neighbouring area and heavy rain the biggest in the world record, checks that design is sudden and violent
The dilute chance degree of rain；
S8：The design storm amount lasted from the region chooses typical heavy rain, using homogenous frequency enlargement method to typical heavy rain mistake
Journey and the canonical process of design flood are amplified；
S9：By push pull azobenzene compounds, Derivation Design flood is calculated by typical heavy rain and design storm, examines the heavy rain big vast
Whether the hypothesis of water same frequency succeeds.
In the present invention, rainfall formula is：Qy=Ψ qF, wherein Qy are design rainwater flow, and q is storm intensity, and F is
Catchment area.
It in the present invention, independently chooses the region difference and lasts most torrential rain amount and counted, and be converted to different frequency
Mean storm intensity~duration curve, expression formula is：Wherein t is storm duration, and i is to last
The maximum mean storm intensity for being P for t, frequency, SPFor rain power, n is heavy rain damped expoential, and d is inspection parameter.
In the present invention, when which counts the storm frequency Drawing of Curve lasted, it should be noted that the storm frequency respectively lasted is bent
Line cannot intersect, and the spacing of the storm frequency Drawing of Curve respectively lasted is moderate.
In the present invention, the efficiency of the efficient heavy rain in neighbouring area is selected to think to have reached possible maximum, i.e. η=ηm, therefore design stream
The probable maximum storm Pm in domain isWherein P, W are respectively the exemplary potent heavy rain being transplanted
Rainfall and precipitable water, WmTo design the possibility maximum precipitable water of region.
Push pull azobenzene compounds calculation formula is as follows in the present invention：
Synthesis design flow Qm, and corresponding watershed concentration time τ can be acquired
Wherein F, L, J are drainage characteristics parameter, SP, n be Rainstorm Feature parameter, produce confluence parameter.
It is solved by calculating mapping.
The method is to formula
WithRespectively
Make curve Qm τ and τ Qm, point is painted on a figure.
The reading of two line intersection points obviously meets formula simultaneously
WithTherefore
Intersection point reading Qm, τ are the solution of equation group.
Design is lasted for 5 days in S5, with 1 day, 3 it is heaven-made last in order to control, times magnification than calculating formula be：
It is 1 day maximum:
Remaining 2 days in 3 days maximum:
Remaining 4 days in 5 days maximum:
In formula, x1p、x3pAnd x5pRespectively 1d, 3d and 7d design storm amount (mm)；x1、x3And x5Respectively 1d, 3d and 7d
Typical storm rainfall (mm).
Finally obtain design storm (P=1%) time distribution table, such as following table：
And obtain same frequency control amplifying method Derivation Design Heavy Rainfall Process table, such as following table：
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. designing storm flood same frequency under a kind of changing environment assumes the method for inspection, which is characterized in that include the following steps：
S1：Choosing any region is used as band to examine region, looks into nomogram table by storm runoff or hydrologic manual looks into calculation and counts the ground
The design storm that domain is lasted；
S2：It converts the design storm that the region is lasted to any design storm lasted by rainfall formula；
S3：Storm sampling is carried out from the design storm lasted, is calculated using the heavy rain of sampling；
S4：Judge whether storm sampling data belongs to extra torrential rain, by the return period of river flood investigation extra torrential rain, and ties
Close documenting analysis estimation of the Regional History document in relation to the condition of a disaster data；
S5：Check that statistical parameter, design storm last longer, mean valueIncrease, CV becomes smaller, a certain design value x lastedPIncrease；
S6：The storm frequency curve that region statistics is lasted is painted on a figure and is compared and analyzed；
S7：Analysis comparison is carried out with actual measurement torrential rain or neighbouring area and heavy rain the biggest in the world record, checks that design storm is dilute
Chance degree；
S8：The design storm amount lasted from the region chooses typical heavy rain, using homogenous frequency enlargement method to typical Heavy Rainfall Process and
The canonical process of design flood is amplified；
S9：By push pull azobenzene compounds, Derivation Design flood is calculated by typical heavy rain and design storm, examines the storm flood same
Whether frequency hypothesis succeeds.
2. designing storm flood same frequency under a kind of changing environment according to claim 1 assumes the method for inspection, feature
It is, rainfall formula is in the S2：
Qy=Ψ qF, wherein Qy are design rainwater flow, and q is storm intensity, and F is catchment area.
3. designing storm flood same frequency under a kind of changing environment according to claim 1 assumes the method for inspection, feature
It is, the region difference is independently chosen in the S3 lasts most torrential rain amount and counted, and is converted to the flat of different frequency
Equal storm intensity~duration curve, expression formula are：OrWherein t is storm duration, and i is to be lasted for t, frequency
Rate is the maximum mean storm intensity of P, and SP is rain power, and n is heavy rain damped expoential, and d is inspection parameter.
4. designing storm flood same frequency under a kind of changing environment according to claim 1 assumes the method for inspection, feature
It is, when the region counts the storm frequency Drawing of Curve lasted in the S6, it should be noted that the storm frequency curve respectively lasted is not
It can intersect, the spacing of the storm frequency Drawing of Curve respectively lasted is moderate.
5. designing storm flood same frequency under a kind of changing environment according to claim 1 assumes the method for inspection, feature
It is, the efficiency of the efficient heavy rain in neighbouring area of the S7 selecting thinks to have reached possible maximum, i.e. η=ηm, therefore design basin can
Can most torrential rain Pm beWherein P, W be respectively the rainfall of exemplary potent heavy rain being transplanted and
Precipitable water, Wm are the possibility maximum precipitable water for designing region.
6. designing storm flood same frequency under a kind of changing environment according to claim 1 assumes the method for inspection, feature
It is, push pull azobenzene compounds calculation formula is as follows in the S9：
Wherein F, L, J are drainage characteristics parameter, and SP, n are Rainstorm Feature parameter, produce confluence parameter.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111275242A (en) * | 2020-01-08 | 2020-06-12 | 昆明理工大学 | Downstream protection tailing pond flood regulating method based on tabu search optimization algorithm |
| CN111339711A (en) * | 2020-02-24 | 2020-06-26 | 三峡大学 | Small watershed design flood calculation method |
| CN112052602A (en) * | 2020-09-18 | 2020-12-08 | 福建省水土保持工作站 | Storm rainfall time interval distribution calculation method applied to mountainous area small watershed design |
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| CN105975672A (en) * | 2016-04-29 | 2016-09-28 | 河海大学 | Small-watershed design flood calculation method |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975672A (en) * | 2016-04-29 | 2016-09-28 | 河海大学 | Small-watershed design flood calculation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111275242A (en) * | 2020-01-08 | 2020-06-12 | 昆明理工大学 | Downstream protection tailing pond flood regulating method based on tabu search optimization algorithm |
| CN111339711A (en) * | 2020-02-24 | 2020-06-26 | 三峡大学 | Small watershed design flood calculation method |
| CN112052602A (en) * | 2020-09-18 | 2020-12-08 | 福建省水土保持工作站 | Storm rainfall time interval distribution calculation method applied to mountainous area small watershed design |
| CN112052602B (en) * | 2020-09-18 | 2022-06-07 | 福建省水土保持工作站 | Storm rainfall time interval distribution calculation method applied to mountainous area small watershed design |
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