CN106337388A - Method for determining cascade reservoir interval incoming sediment amount and distributing cascade reservoir interval incoming sediment amount along flowing path - Google Patents
Method for determining cascade reservoir interval incoming sediment amount and distributing cascade reservoir interval incoming sediment amount along flowing path Download PDFInfo
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- 239000013049 sediment Substances 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000004576 sand Substances 0.000 claims description 16
- 238000009991 scouring Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract 2
- 241000124879 Grus leucogeranus Species 0.000 description 9
- 238000004062 sedimentation Methods 0.000 description 4
- 230000009182 swimming Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241000283690 Bos taurus Species 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The invention discloses a method for determining the cascade reservoir interval incoming sediment amount and distributing the cascade reservoir interval incoming sediment amount along the flowing path. The method includes the steps that firstly, the sediment runoff data of cascade reservoir main stem and branch control stations, damsites and intervals are collected; secondly, the sediment runoff and process of the damsites in the typical series year are determined according to the ratio of the average yearly sediment runoffs of the damsites to nearby control hydrometric stations in multiple years; thirdly, the sediment runoff difference between the upstream reservoir damsite and the entering-reservoir control station serves as the uncontrolled interval incoming sediment amount, and the sediment runoff difference between the upstream reservoir damsite and the downstream damsite serves as the uncontrolled interval incoming sediment amount of the downstream reservoir; fourthly, in the uncontrolled interval, when one branch has no sediment runoff data in the typical series year but has the average yearly sediment runoff data in multiple years, the branch uses the average yearly sediment runoff data in multiple years; and fifthly, other incoming sediment amount except for the know branch in the uncontrolled interval is evenly distributed into the main stem watercourse along the flowing path. By means of the method for determining the cascade reservoir interval incoming sediment amount and distributing the cascade reservoir interval incoming sediment amount along the flowing path, the cascade reservoir interval incoming sediment amount can be determined reasonably, and technical support is provided for prediction and calculation of sediment erosion and deposition of the cascade reservoir.
Description
Technical field
The present invention relates to hydraulic engineering technical field, more particularly to a kind of determination of step reservoir interval sediment yield and its
Along journey distribution method.
Background technology
China's hydraulic power potentials enriches, and numerous Step Hydraulic Engineerings make step reservoir number increase severely, each cascaded reservoirs
Gradually form.Sediment Siltation problem be impact step reservoir long-term with one of with the key factor of profit point, carry out ladder
The combined dispatching of the level cooperative reservoir water dispatch not only water yield to be considered, also should consider the combined dispatching of silt simultaneously.Carry out step water
Storehouse Sedimentation calculates research, contributes to disclosing Cascade Reservoirs Regularity of Sediment Deposition, can be step reservoir combined dispatching mode
Optimize and technical support is provided, this is accomplished by choosing typical case's series year water sand process and carries out the prediction of step reservoir Sedimentation and calculates.
When step reservoir is interval big, when sediment yield is big, the determination of interval sediment yield and its step reservoir mud can be directly affected along journey distribution
Husky erosion and deposition precision of prediction.
Prior art often adopts long-time average annual value or serial year data replacement known to other for interval tributary sediment yield,
In uncontrolled zone, other sediment yields in addition to known tributary often add River in the way of concentrating and importing.Prior art is deposited
Not enough inclusion: interval husky amount and its unreasonable of process are caused into outbound husky amount non-conservation, and process is unreasonable, interval husky amount
Cause reservoir sedimentation irrational distribution along journey unreasonable distribution.
Content of the invention
The invention mainly solves the technical problem of providing a kind of determination of step reservoir interval sediment yield and its dividing along journey
Method of completing the square, can solve the problem that interval husky amount, process and the problem along journey unreasonable distribution of prior art.
For solving above-mentioned technical problem, one aspect of the present invention is: provides a kind of step reservoir interval next
The determination of husky amount and its along journey distribution method, it comprises the following steps:
Step 1, collects step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and interval sedimentary loading data；
Step 2, determines typical case's series at dam site according to dam site with the neighbouring ratio controlling hydrometric station mean annual sedimentary loading
The sedimentary loading in year and process；
Step 3, using the difference of upper pond dam site and the sedimentary loading of warehouse-in control station as uncontrolled zone sediment yield, will be up and down
At the dam site of swimming storehouse, the difference of sedimentary loading is as lower reservoir uncontrolled zone sediment yield；
Step 4, in uncontrolled zone, when certain tributary no typical case's series annual sediment discharge data has mean sediment runoff data for many years
When, this tributary is using mean sediment runoff data for many years；
Step 5, in uncontrolled zone, the other sediment yields in addition to known tributary add mainstream along journey in the way of evenly distributing
River course.
In step 2, when having hydrometric station at reservoir dam site, then dam site sedimentary loading and process is taken to be equal to this hydrometric station, otherwise,
Then with neighbouring hydrometric station be according to station, determine sedimentary loading and process at reservoir dam site by the ratio of mean sediment runoff for many years；Canonical system
Row year water sand process should be that Ku Qianshui sand process built by step reservoir, and step reservoir natural river course is in erosion and deposition and puts down before assuming to build storehouse
Weighing apparatus state, the husky amount of warehouse-in is equal to the husky amount of outbound.
In step 3, when reservoir dam site mean sediment runoff data for many years cannot be collected, and uncontrolled zone can collect many
During annual sedimentary loading data, then uncontrolled zone uses mean sediment runoff for many years, the husky amount of control station put in storage by step, interval sand is measured,
The husky amount of dam site should meet husky amount conservation.
In step 4, when in uncontrolled zone, certain tributary is using mean sediment runoff for many years, then with sedimentary loading at dam site and process
It is foundation, determine this tributary sedimentary loading process by the ratio of sedimentary loading.
In step 5, the sediment yield in tributary known to deduction first from uncontrolled zone total sediment yield, then by remaining sediment yield
Add reservoir area River in the way of evenly distributing along journey, in step 5 along the mode that journey evenly distributes be: take in uncontrolled zone
Other interval warehouse-in sediment yield in addition to known tributary is qs, and reservoir area channel length is l, then unit river length uniformly puts sand in storage along journey
Measure and beThe long reservoir inflow in unit river is taken to be ql, length warehouse-in silt content in unit river is sl, then unit river length is uniform along journey
The husky amount of warehouse-in is also denoted as qls=sl*ql；
Consider that interval water sand uniformly enters the water and sediment in reservoir equation of motion after converging and is along journey:
Current continuity equation
Water movement equation
Suspended sediment continuity equation
Suspended load river-bed deformation equation
Solve above-mentioned equation group can obtain considering that interval water sand enters the scouring and silting in reservoir after converging and water level, flow etc. calculate knot
Really.
The invention has the beneficial effects as follows: the present invention can overcome the shortcomings of that prior art exists, and the present invention can be more reasonable
Determination step reservoir interval sediment yield and its process, and more reasonably husky for uncontrolled zone amount can be assigned to mainstream river along journey
Road, can provide technical support for improving step reservoir Sedimentation prediction computational accuracy.
Brief description
Fig. 1 be a kind of step reservoir of the present invention interval sediment yield determination and its along journey distribution method flow chart.
Fig. 2 is Upper Yangtze River crow East Germany, white crane beach, Xi Luodu, the Burner zone step reservoir Heavenly Stems and Earthly Branches stream location drawing.
Specific embodiment
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clearly defining.
There is provided a kind of determination of step reservoir interval sediment yield and its along journey distribution method, it comprises the following steps:
Step 1, collects step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and interval sedimentary loading data；
Step 2, determines typical case's series at dam site according to dam site with the neighbouring ratio controlling hydrometric station mean annual sedimentary loading
The sedimentary loading in year and process；
Step 3, using the difference of upper pond dam site and the sedimentary loading of warehouse-in control station as uncontrolled zone sediment yield, will be up and down
At the dam site of swimming storehouse, the difference of sedimentary loading is as lower reservoir uncontrolled zone sediment yield；
Step 4, in uncontrolled zone, when certain tributary no typical case's series annual sediment discharge data has mean sediment runoff data for many years
When, this tributary is using mean sediment runoff data for many years；
Step 5, in uncontrolled zone, the other sediment yields in addition to known tributary add mainstream along journey in the way of evenly distributing
River course.
In step 2, when having hydrometric station at reservoir dam site, then dam site sedimentary loading and process is taken to be equal to this hydrometric station, otherwise,
Then with neighbouring hydrometric station be according to station, determine sedimentary loading and process at reservoir dam site by the ratio of mean sediment runoff for many years；Canonical system
Row year water sand process should be that Ku Qianshui sand process built by step reservoir, and step reservoir natural river course is in erosion and deposition and puts down before assuming to build storehouse
Weighing apparatus state, the husky amount of warehouse-in is equal to the husky amount of outbound.
In step 3, when reservoir dam site mean sediment runoff data for many years cannot be collected, and uncontrolled zone can collect many
During annual sedimentary loading data, then uncontrolled zone uses mean sediment runoff for many years, the husky amount of control station put in storage by step, interval sand is measured,
The husky amount of dam site should meet husky amount conservation.
In step 4, when in uncontrolled zone, certain tributary is using mean sediment runoff for many years, then with sedimentary loading at dam site and process
It is foundation, determine this tributary sedimentary loading process by the ratio of sedimentary loading.
In step 5, the sediment yield in tributary known to deduction first from uncontrolled zone total sediment yield, then by remaining sediment yield
Add reservoir area River in the way of evenly distributing along journey, in step 5 along the mode that journey evenly distributes be: take in uncontrolled zone
Other interval warehouse-in sediment yield in addition to known tributary is qs, and reservoir area channel length is l, then unit river length uniformly puts sand in storage along journey
Measure and beThe long reservoir inflow in unit river is taken to be ql, length warehouse-in silt content in unit river is sl, then unit river length is uniform along journey
The husky amount of warehouse-in is also denoted as qls=sl*ql；
Consider that interval water sand uniformly enters the water and sediment in reservoir equation of motion after converging and is along journey:
Current continuity equation
Water movement equation
Suspended sediment continuity equation
Suspended load river-bed deformation equation
In formula: ω is silt-settling velocity；Footmark i is section number；Q is flow；A is discharge area；T is the time；X is along flow process
Coordinate；Z is water level；K is section hydromodulus；S is silt content；s*For River Sediment Carrying Capacity；ρ ' is drift dry density；B is disconnected
Face width；G is acceleration of gravity；α is restoration ＆ saturation coefficient；adFor suspended load change in bed level area；
Solve above-mentioned equation group can obtain considering that interval water sand enters the scouring and silting in reservoir after converging and water level, flow etc. calculate knot
Really.
The specifically comprising the following steps that of embodiment
Step 1, with 1991～2000 years for typical water husky series year, with black East Germany-white crane beach-Xi Luodu-Burner zone ladder
Level reservoir is object, collects Upper Yangtze River step reservoir Heavenly Stems and Earthly Branches flow control station (Panzhihua, little stone, Wan Tan, Hua Tan, Pingshan
Deng), dam site (black East Germany, white crane beach, Xi Luodu, Burner zone etc.) and interval many annuals and 1991～2000 years typical case's series years
Sedimentary loading data；
Step 2, black East Germany reservoir dam site is 0.674 with the ratio of downstream China bullet station mean annual sedimentary loading, by magnificent bullet station
Typical case's series annual sediment discharge process is multiplied by 0.674 as 1991～2000 years typical case's series years of black East Germany dam site within 1991～2000 years
Sedimentary loading process；Using magnificent bullet station and Babian Jiang Ningnan station sedimentary loading sum as white crane beach reservoir dam site sedimentary loading；By Pingshan station
Sedimentary loading sum is as Burner zone reservoir dam site sedimentary loading；Collect Burner zone reservoir interval mean sediment runoff data for many years, will
The difference of Burner zone dam site sedimentary loading and interval sediment yield is as Xiluodu reservoir dam site sedimentary loading；Pingshan station sedimentary loading is deducted white
Crane beach dam site sedimentary loading, then deduct Burner zone reservoir interval for many years mean sediment runoff as Xiluodu reservoir interval sediment yield；
Step 3, will be interval next husky as black East Germany reservoir with the difference of Panzhihua station and Yalongjiang River sediment yield for black East Germany dam site
Amount；Using the difference of white crane beach dam site and black East Germany dam site sedimentary loading as white crane beach reservoir interval sediment yield；By small stream Lip river cross dam site with
The difference of white crane beach dam site sedimentary loading is as Xiluodu reservoir interval sediment yield；Burner zone reservoir interval sediment yield adopts many annuals
Sedimentary loading data；
Step 4, due to not having 1991～2000 years typical case's series year actual measurement sedimentary loading data, black East Germany reservoir area tributary Longchuan
Jiang Caiyong mean sediment runoff for many years, white crane beach reservoir area tributary is general to cross a river, little Jiang, adopt many annuals sediment transport with gift river, Babian Jiang
Amount；Small stream Luo Du reservoir area tributary Xi Xi river, cattle pen river, pretty girl river are using mean sediment runoff for many years；Burner zone reservoir area tributary Xi Ninghe,
Zhong Douhe, big Wen Xi are using mean sediment runoff for many years；The ratio of reservoir area tributary mean sediment runoff and dam site sedimentary loading for many years is taken advantage of
Tributary sedimentary loading process is obtained with dam site sedimentary loading process.
Step 5, black East Germany, white crane beach, Xi Luodu, Burner zone step each reservoir interval sediment yield are come in tributary known to deduction
Other sediment yields after husky amount add River along journey in the way of evenly distributing.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (5)
1. the determination of a kind of step reservoir interval sediment yield and its along journey distribution method it is characterised in that comprising the following steps:
Step 1, collects step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and interval sedimentary loading data；
Step 2, determines typical case's series year at dam site according to dam site and the neighbouring ratio controlling hydrometric station mean annual sedimentary loading
Sedimentary loading and process；
Step 3, using the difference of upper pond dam site and the sedimentary loading of warehouse-in control station as uncontrolled zone sediment yield, will swim up and down
At the dam site of storehouse, the difference of sedimentary loading is as lower reservoir uncontrolled zone sediment yield；
Step 4, in uncontrolled zone, when certain tributary no typical case's series annual sediment discharge data has mean sediment runoff data for many years,
This tributary is using mean sediment runoff data for many years；
Step 5, in uncontrolled zone, the other sediment yields in addition to known tributary add River along journey in the way of evenly distributing.
2. the determination of a kind of step reservoir interval according to claim 1 sediment yield and its along journey distribution method, its feature
It is, in step 2, when having hydrometric station at reservoir dam site, then take dam site sedimentary loading and process to be equal to this hydrometric station, otherwise, then
It is according to station with neighbouring hydrometric station, determine sedimentary loading and process at reservoir dam site by the ratio of mean sediment runoff for many years；Typical case's series
Nian Shuisha process should be that Ku Qianshui sand process built by step reservoir, and step reservoir natural river course is in coastal line before assuming to build storehouse
State, the husky amount of warehouse-in is equal to the husky amount of outbound.
3. the determination of a kind of step reservoir interval according to claim 1 sediment yield and its along journey distribution method, its feature
It is, in step 3, when collecting reservoir dam site mean sediment runoff data for many years, and uncontrolled zone can be collected for many years
During mean sediment runoff data, then uncontrolled zone is using mean sediment runoff for many years, the husky amount of step warehouse-in control station, interval husky amount, dam
The husky amount in location should meet husky amount conservation.
4. the determination of a kind of step reservoir interval according to claim 1 sediment yield and its along journey distribution method, its feature
It is, in step 4, when certain tributary is using mean sediment runoff for many years in uncontrolled zone, with sedimentary loading at dam site and process be then
Foundation, determines this tributary sedimentary loading process by the ratio of sedimentary loading.
5. the determination of a kind of step reservoir interval according to claim 1 sediment yield and its along journey distribution method, its feature
It is, in step 5, known to deduction first from uncontrolled zone total sediment yield, then remaining sediment yield is pressed by the sediment yield in tributary
Add reservoir area River along the mode that journey evenly distributes, in step 5 along the mode that journey evenly distributes be: take in uncontrolled zone and remove
Other interval warehouse-in sediment yield outside known tributary is qs, and reservoir area channel length is l, then unit river length uniformly puts husky amount in storage along journey
ForThe long reservoir inflow in unit river is taken to be ql, length warehouse-in silt content in unit river is sl, then unit river length uniformly enter along journey
The husky amount in storehouse is also denoted as qls=sl*ql；
Consider that interval water sand uniformly enters the water and sediment in reservoir equation of motion after converging and is along journey:
Current continuity equation
Water movement equation
Suspended sediment continuity equation
Suspended load river-bed deformation equation
Solve above-mentioned equation group can obtain considering that interval water sand enters scouring and silting in reservoir and water level, volume computation after converging.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969756A (en) * | 2017-04-27 | 2017-07-21 | 长江水利委员会水文局 | River suspended sediment sedimentary loading correction computational methods |
| CN107090798A (en) * | 2017-05-16 | 2017-08-25 | 长江水利委员会长江科学院 | Restoration ＆ saturation coefficient computational methods under a kind of reservoir over-saturation sediment transport state |
| CN110472367A (en) * | 2019-08-23 | 2019-11-19 | 黄河勘测规划设计研究院有限公司 | A kind of husky full interactive simulation method and system of heavily silt-carrying river Heavenly Stems and Earthly Branches flowing water |
| CN111882116A (en) * | 2020-07-06 | 2020-11-03 | 长江水利委员会水文局 | Step reservoir sediment real-time forecasting method |
| CN115688622A (en) * | 2022-10-26 | 2023-02-03 | 中国长江三峡集团有限公司 | Method for calculating sand amount in reservoir area |
| CN117556184A (en) * | 2024-01-12 | 2024-02-13 | 长江水利委员会水文局 | Method, system and medium for reducing sediment transport amount of downstream river channel of reservoir in sandy area |
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| CN104060570A (en) * | 2014-07-08 | 2014-09-24 | 浙江省水利河口研究院 | Method for simulating sand holding of water flow under gate |
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| US20050065729A1 (en) * | 2003-09-24 | 2005-03-24 | Roland Masson | Method for simulating the deposition of a sedimentary sequence in a basin |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969756A (en) * | 2017-04-27 | 2017-07-21 | 长江水利委员会水文局 | River suspended sediment sedimentary loading correction computational methods |
| CN106969756B (en) * | 2017-04-27 | 2019-01-29 | 长江水利委员会水文局 | River suspended sediment sedimentary loading corrects calculation method |
| CN107090798A (en) * | 2017-05-16 | 2017-08-25 | 长江水利委员会长江科学院 | Restoration ＆ saturation coefficient computational methods under a kind of reservoir over-saturation sediment transport state |
| CN107090798B (en) * | 2017-05-16 | 2018-11-23 | 长江水利委员会长江科学院 | Restoration & saturation coefficient calculation method under a kind of reservoir over-saturation sediment transport state |
| CN110472367A (en) * | 2019-08-23 | 2019-11-19 | 黄河勘测规划设计研究院有限公司 | A kind of husky full interactive simulation method and system of heavily silt-carrying river Heavenly Stems and Earthly Branches flowing water |
| CN111882116A (en) * | 2020-07-06 | 2020-11-03 | 长江水利委员会水文局 | Step reservoir sediment real-time forecasting method |
| CN111882116B (en) * | 2020-07-06 | 2022-02-08 | 长江水利委员会水文局 | Step reservoir sediment real-time forecasting method |
| CN115688622A (en) * | 2022-10-26 | 2023-02-03 | 中国长江三峡集团有限公司 | Method for calculating sand amount in reservoir area |
| CN115688622B (en) * | 2022-10-26 | 2023-06-13 | 中国长江三峡集团有限公司 | Calculation method for amount of incoming sand between reservoir areas |
| CN117556184A (en) * | 2024-01-12 | 2024-02-13 | 长江水利委员会水文局 | Method, system and medium for reducing sediment transport amount of downstream river channel of reservoir in sandy area |
| CN117556184B (en) * | 2024-01-12 | 2024-03-26 | 长江水利委员会水文局 | Method, system and medium for reducing sediment transport amount of downstream river channel of reservoir in sandy area |
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| CN106337388B (en) | 2018-05-25 |
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