CN106337388B - A kind of step reservoir section sediment yield determines and its along journey distribution method - Google Patents
A kind of step reservoir section sediment yield determines and its along journey distribution method Download PDFInfo
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- CN106337388B CN106337388B CN201610804864.8A CN201610804864A CN106337388B CN 106337388 B CN106337388 B CN 106337388B CN 201610804864 A CN201610804864 A CN 201610804864A CN 106337388 B CN106337388 B CN 106337388B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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Abstract
The invention discloses a kind of determining and its along journey distribution method for step reservoir section sediment yield, including step：Step 1, step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and section sedimentary loading data are collected；Step 2, the sedimentary loading and process in typical case's serial year at dam site are determined with the ratio between control hydrometric station mean annual sedimentary loading nearby according to dam site；Step 3, using the difference of upper pond dam site and the sedimentary loading for being put in storage control station as uncontrolled zone sediment yield, using the difference of sedimentary loading at upstream and downstream reservoir dam site as lower reservoir uncontrolled zone sediment yield；Step 4, in uncontrolled zone, when there is mean sediment runoff data for many years in certain tributary without typical serial annual sediment discharge data, which uses mean sediment runoff data for many years；Step 5, other sediment yields in uncontrolled zone in addition to known tributary add in River in the way of being evenly distributed along journey.The present invention can rationally determine step reservoir section sediment yield, can predict to calculate providing technical support for step reservoir Sedimentation.
Description
Technical field
The present invention relates to hydraulic engineering technical field, more particularly to a kind of step reservoir section sediment yield determine and its
Along journey distribution method.
Background technology
China's hydraulic power potentials enriches, and numerous Step Hydraulic Engineerings cause step reservoir number to increase severely, each cascaded reservoirs
It has gradually formed.Sediment siltation problem is to influence step reservoir for a long time with one of with the key factor of profit point, carries out ladder
Grade cooperative reservoir water dispatch will not only consider the combined dispatching of water, should also consider the combined dispatching of silt simultaneously.Carry out step water
Storehouse Sedimentation calculates research, helps to disclose Cascade Reservoirs Regularity of Sediment Deposition, can be step reservoir combined dispatching mode
Optimization offer technical support, this just needs to choose typical serial year water sand process progress step reservoir Sedimentation prediction calculating.
When step reservoir section is big, when sediment yield is big, section sediment yield determines and its can directly affect step reservoir mud along journey distribution
Husky erosion and deposition precision of prediction.
The prior art is often replaced for section tributary sediment yield using long-time average annual value or other known serial year data,
Other sediment yields in uncontrolled zone in addition to known tributary often add in River in the way of concentrating and importing.The prior art is deposited
Deficiency include：The husky amount in section and its unreasonable of process are caused into the husky amount non-conservation of outbound, and process is unreasonable, the husky amount in section
Cause reservoir sedimentation irrational distribution along journey unreasonable distribution.
The content of the invention
Divide the invention mainly solves the technical problem of providing a kind of the definite of step reservoir section sediment yield and its along journey
Method of completing the square can solve the problems, such as the husky amount in section of the prior art, process and along journey unreasonable distribution.
In order to solve the above technical problems, one aspect of the present invention is：A kind of step reservoir section is provided
Sand amount determines and its that along journey distribution method it comprises the following steps：
Step 1, step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and section sedimentary loading data are collected；
Step 2, typical case's series at dam site is determined according to dam site and the ratio between control hydrometric station mean annual sedimentary loading nearby
The sedimentary loading and process in year；
It step 3, will up and down using the difference of upper pond dam site and the sedimentary loading for being put in storage control station as uncontrolled zone sediment yield
The difference of sedimentary loading is as lower reservoir uncontrolled zone sediment yield at swimming storehouse dam site；
Step 4, in uncontrolled zone, when there is mean sediment runoff data for many years in certain tributary without typical serial annual sediment discharge data
When, which uses mean sediment runoff data for many years；
Step 5, other sediment yields in uncontrolled zone in addition to known tributary add in mainstream in the way of being evenly distributed along journey
River.
In step 2, when having hydrometric station at reservoir dam site, then dam site sedimentary loading and process is taken to be equal to the hydrometric station, otherwise,
Then using neighbouring hydrometric station as according to standing, sedimentary loading and process at reservoir dam site are determined by the ratio between mean sediment runoff for many years；Canonical system
Row year water sand process should be that step reservoir builds Ku Qianshui sand processes, and assume that step reservoir natural river course is put down in erosion and deposition before building storehouse
Weighing apparatus state is put in storage husky amount and is equal to the husky amount of outbound.
In step 3, when reservoir dam site mean sediment runoff data for many years can not be collected into, and uncontrolled zone collect it is more
During annual sedimentary loading data, then uncontrolled zone uses mean sediment runoff for many years, step storage control station sand is measured, section sand is measured,
The husky amount of dam site should meet husky amount conservation.
In step 4, when certain tributary is using mean sediment runoff for many years in uncontrolled zone, then with sedimentary loading at dam site and process
For foundation, the tributary sedimentary loading process is determined by the ratio between 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
Reservoir area River is added in the way of being evenly distributed along journey, the mode evenly distributed in step 5 along journey is：It takes in uncontrolled zone
Other sections storage sediment yield in addition to known tributary is QS, and reservoir area channel length is L, then unit river length is uniformly put in storage sand along journey
It measures and isIt is q to take the long reservoir inflow in unit riverL, unit river length storage silt content is SL, then unit river length is uniform along journey
The husky amount of storage is also denoted as qls=SL*qL；
Consider that section water sand uniformly enters the water and sediment in reservoir equation of motion after converging along journey and is：
Current continuity equation
Water movement equation
Suspended sediment continuity equation
Suspended load river-bed deformation equation
Solving above-mentioned equation group can obtain considering that section water sand enters the calculating knots such as scouring and silting in reservoir and water level, flow after converging
Fruit.
The beneficial effects of the invention are as follows：The present invention can overcome the shortcomings of the prior art, and the present invention can more rationally
Definite step reservoir section sediment yield and its process, and can the husky amount of uncontrolled zone be more reasonably assigned to mainstream river along journey
Road can predict that computational accuracy provides technical support to improve step reservoir Sedimentation.
Description of the drawings
Fig. 1 is that a kind of step reservoir section sediment yield of the invention determines 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
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
A kind of determining and its along journey distribution method for step reservoir section sediment yield is provided, it comprises the following steps：
Step 1, step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and section sedimentary loading data are collected；
Step 2, typical case's series at dam site is determined according to dam site and the ratio between control hydrometric station mean annual sedimentary loading nearby
The sedimentary loading and process in year；
It step 3, will up and down using the difference of upper pond dam site and the sedimentary loading for being put in storage control station as uncontrolled zone sediment yield
The difference of sedimentary loading is as lower reservoir uncontrolled zone sediment yield at swimming storehouse dam site；
Step 4, in uncontrolled zone, when there is mean sediment runoff data for many years in certain tributary without typical serial annual sediment discharge data
When, which uses mean sediment runoff data for many years；
Step 5, other sediment yields in uncontrolled zone in addition to known tributary add in mainstream in the way of being evenly distributed along journey
River.
In step 2, when having hydrometric station at reservoir dam site, then dam site sedimentary loading and process is taken to be equal to the hydrometric station, otherwise,
Then using neighbouring hydrometric station as according to standing, sedimentary loading and process at reservoir dam site are determined by the ratio between mean sediment runoff for many years；Canonical system
Row year water sand process should be that step reservoir builds Ku Qianshui sand processes, and assume that step reservoir natural river course is put down in erosion and deposition before building storehouse
Weighing apparatus state is put in storage husky amount and is equal to the husky amount of outbound.
In step 3, when reservoir dam site mean sediment runoff data for many years can not be collected into, and uncontrolled zone collect it is more
During annual sedimentary loading data, then uncontrolled zone uses mean sediment runoff for many years, step storage control station sand is measured, section sand is measured,
The husky amount of dam site should meet husky amount conservation.
In step 4, when certain tributary is using mean sediment runoff for many years in uncontrolled zone, then with sedimentary loading at dam site and process
For foundation, the tributary sedimentary loading process is determined by the ratio between 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
Reservoir area River is added in the way of being evenly distributed along journey, the mode evenly distributed in step 5 along journey is：It takes in uncontrolled zone
Other sections storage sediment yield in addition to known tributary is QS, and reservoir area channel length is L, then unit river length is uniformly put in storage sand along journey
It measures and isIt is q to take the long reservoir inflow in unit riverL, unit river length storage silt content is SL, then unit river length is uniform along journey
The husky amount of storage is also denoted as qls=SL*qL；
Consider that section water sand uniformly enters the water and sediment in reservoir equation of motion after converging along journey and is：
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
Coordinate；Z is water level；K is section hydromodulus；S is silt content；S*For River Sediment Carrying Capacity；ρ ' is sediment 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；
Solving above-mentioned equation group can obtain considering that section water sand enters the calculating knots such as scouring and silting in reservoir and water level, flow after converging
Fruit.
Embodiment is as follows：
Step 1, it was typical water husky serial year with 1991~2000 years, with black East Germany-white crane beach-Xi Luodu-Burner zone ladder
Grade reservoir is object, collects Upper Yangtze River step reservoir Heavenly Stems and Earthly Branches flow control station (Panzhihua, small stone, Wan Tan, Hua Tan, Pingshan
Deng), dam site (black East Germany, white crane beach, Xi Luodu, Burner zone etc.) and section be average for many years and 1991~2000 years typical cases serial year
Sedimentary loading data；
Step 2, the ratio between black East Germany's reservoir dam site and downstream China bullet station mean annual sedimentary loading are 0.674, by magnificent bullet station
The serial annual sediment discharge process of 1991~2000 years typical cases is multiplied by 0.674 as 1991~2000 years typical cases of black East Germany dam site serial year
Sedimentary loading process；Using the sum of magnificent bullet station and Babian Jiang Ningnan station sedimentary loading as white crane beach reservoir dam site sedimentary loading；By Pingshan station
The sum of sedimentary loading is used as Burner zone reservoir dam site sedimentary loading；Burner zone reservoir section mean sediment runoff data for many years is collected into, it will
The difference of Burner zone dam site sedimentary loading and section sediment yield is as Xiluodu reservoir dam site sedimentary loading；Pingshan station sedimentary loading is subtracted white
Crane beach dam site sedimentary loading, then subtract Burner zone reservoir section for many years mean sediment runoff as Xiluodu reservoir section sediment yield；
Step 3, come using black East Germany's dam site and the difference of Panzhihua station and Yalongjiang River sediment yield as black East Germany's reservoir section husky
Amount；Using the difference of white crane beach dam site and black East Germany dam site sedimentary loading as white crane beach reservoir section 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 section sediment yield；The sediment yield use of Burner zone reservoir section is average for many years
Sedimentary loading data；
Step 4, due to the serial year actual measurement sedimentary loading data of no 1991~2000 years typical cases, black East Germany reservoir area tributary Longchuan
Jiang Caiyong mean sediment runoffs for many years, white crane beach reservoir area tributary is general to cross a river, little Jiang, with gift river, Babian Jiang using the sediment transport that is averaged for many years
Amount；Small stream Luo Du reservoir areas tributary Xi Xi rivers, 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；By reservoir area tributary, mean sediment runoff and the ratio of dam site sedimentary loading multiply for many years
Tributary sedimentary loading process is obtained with dam site sedimentary loading process.
Step 5, black East Germany, white crane beach, Xi Luodu, each reservoir section sediment yield of Burner zone step are come in tributary known to deduction
Other sediment yields after sand amount add in River in the way of being evenly distributed along journey.
The foregoing is merely the embodiment of the present invention, are not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of step reservoir section sediment yield determines and its along journey distribution method, which is characterized in that comprises the following steps：
Step 1, step reservoir Heavenly Stems and Earthly Branches flow control station, dam site and section sedimentary loading data are collected；
Step 2, typical case's serial year at dam site is determined according to dam site and the ratio between control hydrometric station mean annual sedimentary loading nearby
Sedimentary loading and process；
Step 3, using the difference of upper pond dam site and the sedimentary loading for being put in storage control station as uncontrolled zone sediment yield, will swim up and down
The difference of sedimentary loading is as lower reservoir uncontrolled zone sediment yield at the dam site of storehouse；
Step 4, in uncontrolled zone, when there is mean sediment runoff data for many years in certain tributary without typical serial annual sediment discharge data,
The tributary uses mean sediment runoff data for many years；
Step 5, other sediment yields in uncontrolled zone in addition to known tributary add in River in the way of being evenly distributed along journey.
2. a kind of step reservoir section sediment yield according to claim 1 determines and its along journey distribution method, feature
It is, in step 2, when having hydrometric station at reservoir dam site, then dam site sedimentary loading and process is taken to be equal to the hydrometric station, otherwise, then
Using neighbouring hydrometric station as according to standing, sedimentary loading and process at reservoir dam site are determined by the ratio between mean sediment runoff for many years；Typical series
Nian Shuisha processes should be that step reservoir builds Ku Qianshui sand processes, and assume that step reservoir natural river course is in coastal line before building storehouse
State is put in storage husky amount and is equal to the husky amount of outbound.
3. a kind of step reservoir section sediment yield according to claim 1 determines and its along journey distribution method, feature
It is, in step 3, when that can not be collected into reservoir dam site mean sediment runoff data for many years, and uncontrolled zone collects for many years
During mean sediment runoff data, then uncontrolled zone uses mean sediment runoff for many years, the husky amount of step storage control station, the husky amount in section, dam
The husky amount in location should meet husky amount conservation.
4. a kind of step reservoir section sediment yield according to claim 1 determines and its along journey distribution method, feature
Be, in step 4, when certain tributary is using mean sediment runoff for many years in uncontrolled zone, then using at dam site sedimentary loading and process as
Foundation determines the tributary sedimentary loading process by the ratio between sedimentary loading.
5. a kind of step reservoir section sediment yield according to claim 1 determines and its along journey distribution method, feature
It is, in step 5, the sediment yield in tributary known to deduction, then presses remaining sediment yield first from uncontrolled zone total sediment yield
The mode evenly distributed along journey adds in reservoir area River, and the mode evenly distributed in step 5 along journey is：It takes in uncontrolled zone and removes
Other sections storage sediment yield outside known tributary is QS, and reservoir area channel length is L, then unit river length is uniformly put in storage husky amount along journey
ForIt is q to take the long reservoir inflow in unit riverL, unit river length storage silt content is SL；
Consider that section water sand uniformly enters the water and sediment in reservoir equation of motion after converging along journey and is：
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 coordinate；Z is water level；K is section hydromodulus；S is silt content；S*For River Sediment Carrying Capacity；ρ'
For sediment dry density；B is section width；G is acceleration of gravity；α is restoration ＆ saturation coefficient；AdFor suspended load change in bed level face
Product；qLFor the long reservoir inflow in unit river；SLStorage silt content is grown for unit river；
Solving above-mentioned equation group can obtain considering that section water sand enters scouring and silting in reservoir and water level, volume computation after converging.
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| 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 |
| 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 |
| CN110472367B (en) * | 2019-08-23 | 2021-03-09 | 黄河勘测规划设计研究院有限公司 | Water-sand full-interaction simulation method and system for multi-sand river main and branch streams |
| 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 |
| 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 |
| 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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| FR2860076B1 (en) * | 2003-09-24 | 2005-10-28 | Inst Francais Du Petrole | METHOD FOR SIMULATING THE DEPOSITION OF A SEDIMENT SEQUENCE IN A BASIN |
| CN102852114B (en) * | 2012-09-13 | 2015-01-07 | 中国水电顾问集团北京勘测设计研究院 | Reservoir sediment deposition calculating method |
| CN103679285B (en) * | 2013-11-29 | 2015-04-15 | 河海大学 | Reservoir group combined operation scheduling system and method for improving river and lake relationship |
| CN103981833B (en) * | 2014-05-27 | 2015-11-11 | 浙江省水利河口研究院 | High sediment concentration tidal bore simulation experiment method |
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