CN116955897A - Borderless flat prototype lake reservoir dynamic reservoir capacity curve calculation method - Google Patents
Borderless flat prototype lake reservoir dynamic reservoir capacity curve calculation method Download PDFInfo
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Abstract
The invention discloses a borderless flat prototype lake-reservoir dynamic reservoir capacity curve calculation method, which comprises the following steps: collecting relevant data materials; calculating 'dead reservoir capacity' by utilizing a prismatic formula, extracting the area of a water area of a lake and a reservoir by utilizing satellite remote sensing data, determining water level data, calculating 'Xingli reservoir capacity' by combining a prismatic table formula, dividing different equal water level lines based on DEM elevation data of the borderless lake and reservoir, determining 'check reservoir capacity' by utilizing a cuboid calculation formula, and summing 3 reservoir capacities to obtain total reservoir capacity; calculating an actually measured water level value under the influence of the change of the reservoir capacity according to a water balance equation, and verifying the correctness of a reservoir capacity curve by using a difference product curve of the reservoir capacity change and the water level change; and (5) establishing a borderless flat prototype lake-reservoir dynamic reservoir capacity curve function. The invention can solve the problem that the original storage capacity curve of the Hongze lake can not meet the requirements of flood control, regulation, ecological protection and the like at present.
Description
Technical Field
The invention belongs to the technical field of ecological restoration, and particularly relates to a borderless flat prototype lake and reservoir dynamic storage capacity curve calculation method.
Background
The Hongze lake is a lake with the largest river basin, is positioned at the northwest part of Jiangsu, is a junction point of a middle stream, a tributary and a downstream river channel of the river, and has various functions of flood control, power generation, water supply, irrigation, shipping and the like. Four flood discharging channels are arranged at the downstream of the flood lake, the flood discharging channels mainly enter the river, the sea enters the sea and the camera enters the sea, but the design flood discharging capacity of the downstream river enters the sea, namely, only 80% of the design flood peak flow of the lake, the flood peak regulating and clipping tasks of the flood lake are heavy, the flood peak of the lake is high and fat, the duration of one flood process lasts for about one month when large flood comes, the continuous high water level of the flood lake is formed, and huge flood control pressure is brought to the downstream region. And because the water level of the flood-soil lake is supported, not only is the water level of the river main flow not smooth in the water flow of the river discharged when the flood is large, but also the water level of the river main flow is raised by medium flood, so that the drainage of the water flow of the branch river on two sides is affected, and the river is blocked by sediment accumulation for many years, so that flood control, regulation, ecological restoration and the like become an important and urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a borderless flat prototype lake-reservoir dynamic reservoir capacity curve calculation method for solving the problem.
In order to achieve the above purpose, the present invention provides the following technical solutions: a borderless flat prototype lake-reservoir dynamic reservoir capacity curve calculation method comprises the following specific steps:
step one: collecting the flow of a target lake entering a lake and the flow of a target lake for many years, rainfall, evaporation capacity and infiltration capacity for many years, the date water level data measured for many years, and satellite remote sensing, DEM and measured topographic data;
step two: selecting a method for calculating a storage capacity curve;
step three: calculating the area, the water level and the reservoir capacity by a selected method to obtain a reservoir capacity curve;
step four: calculating the change amount of the reservoir capacity according to the water balance equation, and verifying the correctness of the reservoir capacity curve;
step five: and establishing a borderless dynamic reservoir capacity curve function.
Preferably, the method for selecting and calculating the storage capacity curve in the step 2 comprises the following steps:
firstly, dividing the storage capacity of the lake into three parts according to the characteristics of the change of the free water surface of the lake;
and step two, combining the three parts of the storage capacity calculated in the step one to obtain a complete storage capacity curve.
Preferably, in the first step in the step 2, the lake reservoir volume is divided into three parts:
the first part is the dead reservoir capacity corresponding to the lake dead water level, and the dead reservoir capacity is calculated by combining a prism formula through correcting the actual underwater topography data with low precision and is marked as A;
the second part is the reservoir capacity between the dead water level and the normal water storage level, the area of the water area is extracted through the remote sensing image, and the 'Xinglingku' is calculated according to the water level data and the prismatic table formula and is marked as B;
the third part is the check reservoir capacity between the normal water storage level and the check flood level, and the reservoir capacity is calculated by combining a cuboid formula through DEM elevation data and is marked as C.
Preferably, the first part calculates the reservoir capacity a based on a prismatic formula. Firstly, collecting points of each area of a lake, measuring the water depth through a GPS, correcting actual underwater topography data with low precision, and calculating the reservoir capacity by utilizing a prism formula. The calculation formula is as follows:V i ＝S i ×(H-/>wherein S is i For the bottom area of each small prism, H is the dead water level, H i For the corresponding lake bottom elevation of each small prism, V i Is the storage capacity between the ith water level and the (i-1) th water level, V 1 The total storage capacity of the storage capacity A.
Preferably, the second part calculates the reservoir volume B, the baseAnd (5) calculating the storage capacity from the satellite remote sensing image data. Preprocessing the remote sensing data, extracting the area of the water area, collecting water level data under the corresponding remote sensing data, pushing out a water level area curve, and calculating the reservoir capacity by using a prismatic table formula. The calculation formula is as follows: wherein H is j F is the water level difference between two adjacent water levels j-1 ，F j Is the area of lake water area, V j Is the storage capacity between the jth water level and the jth-1 water level, V 2 The total storage capacity of the storage capacity B.
Preferably, the third part calculates the storage capacity C by using DEM data. The calculation formula is as follows:V k ＝d 2 (H′-h k ). Wherein d is the regular DEM grid spacing, h k For Gao Chengxiao, the height of the grid water level at the designated water level is H 'which is the height of the designated water level, n is the total number of grids below the water level H', V 3 Is the storage capacity of the designated water level.
Preferably, the water balance equation in step 4 is as follows, deltaV (reservoir volume) =W Into (I) -W Out of +W Lowering blood pressure -W Steaming -W Infiltration into the lower part The method comprises the steps of carrying out a first treatment on the surface of the Wherein W is Into (I) For total water quantity in storage W Out of For total water yield, W Lowering blood pressure For rainfall, W Steaming For evaporating amount, W Infiltration into the lower part And obtaining a difference product curve of the reservoir capacity change amount and the water level change amount according to the measured water level data under the corresponding change reservoir capacity to verify the correctness of the reservoir capacity curve.
Preferably, in the step 5, the borderless dynamic reservoir capacity curve function is v=f (h, a, W (t), a), wherein h is the water level, a is the water area, t is the time, W (t) is the function relation of the sediment migration amount and the time, and a is the area of reclamation, field making and circle gathering.
The invention has the technical effects and advantages that: the method can solve the problem that the dynamic reservoir capacity curve of the borderless reservoir is difficult to determine, and for the borderless reservoir, a larger error is brought by selecting a fixed boundary when a model is used for simulation;
for borderless flat prototype lakes and reservoirs, a silted shoal is easy to form at an inlet, and the water level-reservoir capacity curve of the pool is greatly changed due to the shoal development and reclamation occupation. Based on the method, the reservoir capacity is divided into dead reservoir capacity, positive reservoir capacity and checking reservoir capacity, a prismatic formula, a prismatic table formula and a cuboid formula are respectively adopted for calculating different reservoir capacities, the total reservoir capacity is further obtained through summation, water level values corresponding to different reservoir capacities are calculated according to a water quantity balance equation, the correctness of a reservoir capacity curve is verified through a difference product curve of reservoir capacity change amount and water level change amount, and therefore a borderless flat prototype reservoir dynamic reservoir capacity curve function is built, and the hydraulic engineering management requirements are better met.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Working principle: step 1, collecting the flow of a target lake entering a lake or flowing out of the lake for many years, rainfall, evaporation capacity and infiltration capacity for many years, actual measurement daily water level data for many years, satellite remote sensing, DEM and actual measurement topographic data;
step 2, selecting a method for calculating a storage capacity curve,
step 3, calculating the area, the water level and the reservoir capacity by a selected method to obtain a reservoir capacity curve;
step 4, calculating the change amount of the reservoir capacity according to the water balance equation, and verifying the correctness of the reservoir capacity curve;
and 5, establishing a borderless dynamic reservoir capacity curve function.
The method for selecting and calculating the storage capacity curve in the step 2 is as follows: according to the characteristics of the change of the free water surface of the lake, the lake reservoir capacity is divided into three parts, wherein the first part is the dead reservoir capacity corresponding to the dead water level of the lake, the dead reservoir capacity is calculated by combining a prism formula through actual underwater topography data with low correction accuracy, the dead reservoir capacity is marked as A, the second part is the dead water level to the normal water storage level, the water area is extracted through a remote sensing image, the Xingli reservoir capacity is calculated according to the water level data and a prism formula, the Xingli reservoir capacity is marked as B, the third part is the check reservoir capacity between the normal water storage level to the check flood level, the reservoir capacity is calculated by combining a cuboid formula through DEM elevation data, and the reservoir capacity is marked as C.
In the first step in the step 3, the reservoir capacity A is calculated firstly, all areas of the lake are collected, the water depth is measured through a GPS, then the actual underwater topography data with low accuracy is corrected, and the reservoir capacity is calculated by utilizing a prism formula. The calculation formula is as follows:V i ＝S i ×(H-h i ). Wherein S is i For the bottom area of each small prism, H is the dead water level, H i For the corresponding lake bottom elevation of each small prism, V i Is the storage capacity between the ith water level and the (i-1) th water level, V 1 The total storage capacity of the storage capacity A.
And step 3, calculating a reservoir capacity B, calculating a reservoir capacity curve based on satellite remote sensing image data, preprocessing the remote sensing data, extracting the area of a water area, collecting water level data under the corresponding remote sensing data, calculating a water level area curve, and calculating the reservoir capacity by using a prismatic table formula. The calculation formula is as follows: wherein H is j F is the water level difference between two adjacent water levels j-1 ，F j Is the area of lake water area, V j Is the storage capacity between the jth water level and the jth-1 water level，V 2 The total storage capacity of the storage capacity B.
And step 3, calculating the storage capacity C in the third step, and calculating the storage capacity by using DEM data. The calculation formula is as follows:V k ＝d 2 (H′-h k ). Wherein d is the regular DEM grid spacing, h k For Gao Chengxiao, the height of the grid water level at the designated water level is H 'which is the height of the designated water level, n is the total number of grids below the water level H', V 3 Is the storage capacity of the designated water level.
And in the last step in the step 3, the three parts of the storage capacity of A, B, C calculated in the prior art are combined to obtain a complete storage capacity curve.
The water balance equation in step 4 is as follows, Δv (reservoir capacity) =w Into (I) -W Out of +W Lowering blood pressure -W Steaming -W Infiltration into the lower part The method comprises the steps of carrying out a first treatment on the surface of the Wherein W is Into (I) For total water quantity in storage W Out of For total water yield, W Lowering blood pressure For rainfall, W Steaming For evaporating amount, W Infiltration into the lower part Obtaining a difference product curve of the reservoir capacity change amount and the water level change amount according to the measured water level data under the corresponding change reservoir capacity, and verifying the correctness of the reservoir capacity curve;
in the step 5, the borderless dynamic reservoir capacity curve function is V=f (h, A, T (T), a), wherein h is the water level, A is the area of the water area, T is the time, T (T) is the function relation of the sediment migration amount and the time, and a is the area of the reclamation, the field making and the circle forming.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (8)
1. A borderless flat prototype lake-reservoir dynamic reservoir capacity curve calculation method is characterized by comprising the following steps: the method comprises the following specific steps:
step one: collecting the flow of a target lake entering a lake and the flow of a target lake for many years, rainfall, evaporation capacity and infiltration capacity for many years, the date water level data measured for many years, and satellite remote sensing, DEM and measured topographic data;
step two: selecting a method for calculating a storage capacity curve;
step three: calculating the area, the water level and the reservoir capacity by a selected method to obtain a reservoir capacity curve;
step four: calculating the change amount of the reservoir capacity according to the water balance equation, and verifying the correctness of the reservoir capacity curve;
step five: and establishing a borderless dynamic reservoir capacity curve function.
2. The borderless flat prototype lake reservoir dynamic reservoir capacity curve calculation method of claim 1, wherein the method comprises the following steps: the method for selecting and calculating the storage capacity curve in the step 2 comprises the following steps:
firstly, dividing the storage capacity of the lake into three parts according to the characteristics of the change of the free water surface of the lake;
and step two, combining the three parts of the storage capacity calculated in the step one to obtain a complete storage capacity curve.
3. The borderless flat prototype lake reservoir dynamic reservoir capacity curve calculation method of claim 2, wherein the method comprises the following steps: the first step in the step 2 is to divide the lake reservoir into three parts:
the first part is the dead reservoir capacity corresponding to the lake dead water level, and the dead reservoir capacity is calculated by combining a prism formula through correcting the actual underwater topography data with low precision and is marked as A;
the second part is the reservoir capacity between the dead water level and the normal water storage level, the area of the water area is extracted through the remote sensing image, and the 'Xinglingku' is calculated according to the water level data and the prismatic table formula and is marked as B;
the third part is the check reservoir capacity between the normal water storage level and the check flood level, and the reservoir capacity is calculated by combining a cuboid formula through DEM elevation data and is marked as C.
4. The method for calculating the dynamic reservoir capacity curve of the borderless prototype lake reservoir according to claim 3, wherein the method comprises the following steps of: the first part calculates the reservoir capacity A based on the prismatic formula. Firstly, collecting points of each area of a lake, measuring the water depth through a GPS, correcting actual underwater topography data with low precision, and calculating the reservoir capacity by utilizing a prism formula. The calculation formula is as follows: wherein S is i For the bottom area of each small prism, H is the dead water level, H i For the corresponding lake bottom elevation of each small prism, V i Is the storage capacity between the ith water level and the (i-1) th water level, V 1 The total storage capacity of the storage capacity A.
5. The method for calculating the dynamic reservoir capacity curve of the borderless prototype lake reservoir according to claim 3, wherein the method comprises the following steps of: and calculating the storage capacity B in the second part, and calculating the storage capacity based on satellite remote sensing image data. Preprocessing the remote sensing data, extracting the area of the water area, collecting water level data under the corresponding remote sensing data, pushing out a water level area curve, and calculating the reservoir capacity by using a prismatic table formula. The calculation formula is as follows: wherein H is j F is the water level difference between two adjacent water levels j-1 ，F j Is the area of lake water area, V j Is the storage capacity between the jth water level and the jth-1 water level, V 2 The total storage capacity of the storage capacity B.
6. A method according to claim 3The borderless flat prototype lake-reservoir dynamic reservoir capacity curve calculation method is characterized by comprising the following steps of: and the third part calculates the storage capacity C by selecting DEM data. The calculation formula is as follows:V k ＝d 2 (H′-h k ). Wherein d is the regular DEM grid spacing, h k For Gao Chengxiao, the height of the grid water level at the designated water level is H 'which is the height of the designated water level, n is the total number of grids below the water level H', V 3 Is the storage capacity of the designated water level.
7. The borderless flat prototype lake reservoir dynamic reservoir capacity curve calculation method of claim 1, wherein the method comprises the following steps: the water balance equation in step 4 is as follows, Δv (reservoir capacity) =w Into (I) -W Out of +W Lowering blood pressure -W Steaming -W Infiltration into the lower part The method comprises the steps of carrying out a first treatment on the surface of the Wherein W is Into (I) For total water quantity in storage W Out of For total water yield, W Lowering blood pressure For rainfall, W Steaming For evaporating amount, W Infiltration into the lower part And obtaining a difference product curve of the reservoir capacity change amount and the water level change amount according to the measured water level data under the corresponding change reservoir capacity to verify the correctness of the reservoir capacity curve.
8. The borderless flat prototype lake reservoir dynamic reservoir capacity curve calculation method of claim 1, wherein the method comprises the following steps: in the step 5, the borderless dynamic reservoir capacity curve function is V=f (h, A, W (t), a), wherein h is the water level, A is the area of the water area, t is the time, W (t) is the functional relation between the sediment migration amount and the time, and a is the area of the reclamation, the field making and the circle forming.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107063197A (en) * | 2017-02-28 | 2017-08-18 | 国网江西省电力公司柘林水电厂 | A kind of reservoir indicatrix extracting method based on Spatial Information Technology |
| CN114819322A (en) * | 2022-04-18 | 2022-07-29 | 武汉大学 | Method for forecasting lake inflow flow of lake |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063197A (en) * | 2017-02-28 | 2017-08-18 | 国网江西省电力公司柘林水电厂 | A kind of reservoir indicatrix extracting method based on Spatial Information Technology |
| CN114819322A (en) * | 2022-04-18 | 2022-07-29 | 武汉大学 | Method for forecasting lake inflow flow of lake |
Non-Patent Citations (1)
| Title |
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| 戚晓明等: "基于遥感数据的洪泽湖库容曲线推求", 水利水电科技进展, vol. 37, no. 3, pages 77 - 83 * |
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