CN116163262B - Method for improving bifurcate river water flow conditions through ecological water supplementing port combined with overflow dam - Google Patents
Method for improving bifurcate river water flow conditions through ecological water supplementing port combined with overflow dam Download PDFInfo
- Publication number
- CN116163262B CN116163262B CN202310131615.7A CN202310131615A CN116163262B CN 116163262 B CN116163262 B CN 116163262B CN 202310131615 A CN202310131615 A CN 202310131615A CN 116163262 B CN116163262 B CN 116163262B
- Authority
- CN
- China
- Prior art keywords
- water
- flow
- river
- overflow dam
- bifurcate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 202
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000013589 supplement Substances 0.000 claims abstract description 6
- 238000004088 simulation Methods 0.000 claims description 12
- 238000013178 mathematical model Methods 0.000 claims description 7
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/32—Methods or installations for obtaining or collecting drinking water or tap water with artificial enrichment, e.g. by adding water from a pond or a river
- E03B3/36—Methods or installations for obtaining or collecting drinking water or tap water with artificial enrichment, e.g. by adding water from a pond or a river of surface water
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Fluid Mechanics (AREA)
- Mathematical Analysis (AREA)
- Public Health (AREA)
- Algebra (AREA)
- Computing Systems (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- Health & Medical Sciences (AREA)
- Revetment (AREA)
Abstract
The invention provides a method for improving water flow conditions of bifurcate river channels by combining ecological water supplementing ports with overflow dams, wherein a target river channel is bifurcate river channels of the river channels, the main flow of the target river channel cannot be provided with the water supplementing ports due to the limitation of engineering conditions, the water supplementing ports are arranged on the branch channels of the target river channel, the overflow dams are arranged between the water supplementing ports of the target river channel and the junction of the branch channels and the main flow, the water level of the branch channels is high through the overflow dams, so that water flow supplemented through the water supplementing ports flows back to the branch channels from the branch channels and enters the main flow of the target river channel to supplement water for the main flow, and the water flow conditions and aquatic habitat of the target river channel are improved. The invention can solve the problem that the water supply port is easy to be limited by engineering conditions when the water supply is carried out on the anabranch channels by the existing ecological water supply method, so that the water flow condition of the bifurcate river reach can not be effectively improved, the water flow condition and aquatic habitat of the main stream and the branch channels of the bifurcate river reach can be improved, and the water supply engineering can achieve larger water supply benefit.
Description
Technical Field
The invention belongs to the application field of ecological water-requiring and hydraulic buildings, and relates to a method for improving bifurcate river water flow conditions by combining an ecological water supplementing port with an overflow dam.
Background
For some rivers with higher water resource development degree, the water contradiction in the river basin is prominent because the river flows through areas with a plurality of population and high economic development degree, and the situation that the ecological flow guarantee rate of certain sections is seriously low often occurs, so that a series of problems of weakening of urban landscape effect, deterioration of aquatic habitat and the like are caused. For the river reach needing navigation, the reduction of the flow of certain sections of the river channel also causes the problem of reducing the navigation guarantee rate. In order to solve the above problems, it is necessary to implement ecological water replenishment to improve the water flow conditions in the river.
Although the water flow condition of the river channel can be improved to a certain extent through ecological water supplementing, the water flow condition is quite complex because part of river segments of the river have bifurcate river channels and beach areas. However, due to the limitation of engineering conditions, in practice, the arrangement of the water compensating ports often has difficulty in considering each branch road of a river reach, or the water compensating ports cannot be arranged at ideal positions, so that ecological water compensation is easy to be difficult to achieve the effect of effectively improving the overall water flow condition, and the water compensation benefit is adversely affected. For example, as shown in fig. 1, due to the existence of the natural river branch, and due to the limitation of engineering conditions, a water supplementing port cannot be provided in the main stream of the bifurcate river, and if the water supplementing port is arranged in the branch of the bifurcate river, the water supplementing flow cannot affect the main stream of the bifurcate river, and the water supplementing benefit cannot be obtained in the main stream of anabranch channels.
Therefore, if the problem that the whole water flow condition of bifurcate river channels cannot be effectively improved due to the fact that the water filling ports cannot be arranged at reasonable positions due to the limitation of engineering conditions can be solved, the ecological water filling method has very practical significance for exerting ecological water filling benefits to the greatest extent and fully utilizing water resources.
Disclosure of Invention
Aiming at the problems that when the existing ecological water supplementing method is used for supplementing water for anabranch channels, the setting position of a water supplementing port is easily limited by engineering conditions, so that the water flow condition of a bifurcate river reach cannot be effectively improved and the water supplementing benefit is reduced, the invention provides a method for improving the water flow condition of a bifurcate river channel by combining the ecological water supplementing port with an overflow dam, so that the flow and the retention time of water supplementing water flow in the river channel are improved, the water flow condition and the aquatic habitat of the main flow and the branch channel of the bifurcate river reach greater water supplementing benefit.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The method for improving the water flow condition of bifurcate river channels by combining ecological water supplementing ports with overflow dams comprises the steps that a target river reach is a bifurcate river reach of a river channel, the main flow of the target river reach cannot be provided with water supplementing ports due to the limitation of engineering conditions, the water supplementing ports are arranged on the branch channels of the target river reach, overflow dams are arranged between the water supplementing ports of the target river reach and the junction ports of the branch channels and the main flow, the water level of the branch channels is high through the overflow dams, so that water flow supplemented through the water supplementing ports flows back to the branch channels from the branch channels and enters the main flow of the target river reach to supplement water for the main flow, and the water flow condition and the aquatic habitat of the target river reach are improved.
In the above technical solution, the height of the overflow dam should ensure that a part of the water flow fed through the water supply port flows back from the branch channel to the branch channel and enters the main stream of the target river segment, so that the rest part of the water flow fed through the water supply port flows through the overflow dam to enter the junction area of the branch channel and the main stream.
Further, in the above technical scheme, the height of the overflow dam should ensure that 50% -80% of the water flow rate fed through the water compensating port is reversed from the branch channel to the branch channel and enters the main stream of the target river reach, so that 20% -50% of the water flow rate fed through the water compensating port flows through the overflow dam to enter the junction area of the branch channel and the main stream.
In the technical scheme, the height of the overflow dam is determined in a numerical simulation mode. A viable overflow dam height determination is as follows:
① Collecting hydrological data and topographic data of a target area, and constructing a mathematical model of the target area by utilizing three-dimensional hydraulic numerical simulation software;
② Constructing an overflow dam between a water supplementing port and a branch channel of a target river reach and a converging port of a main stream in a mathematical model, and simulating the hydraulic factors of the main stream and the branch channel of the target river reach under natural inflow and water supplementing flow after constructing the overflow dam;
③ Changing the height of the overflow dam in the mathematical model, repeating the operation of the step ②, and simulating the hydraulic factors of the main flow and the branch channel of the target river reach under the natural inflow flow and the complementary water flow after the overflow dam is constructed;
④ Comparing the improvement degree of the overflow dams with different heights in the step ②③ on the main stream and the water flow conditions of the branch channels of the target river reach, and selecting the height of the overflow dam capable of effectively improving the main stream and the water flow conditions of the branch channels of the target river reach as the height of the overflow dam of the target river reach.
In the above technical solution, when the height of the overflow dam is determined by numerical simulation, the hydraulic factors in step ②③ include the water levels, the flow rates and the flow rates of the main flow and the branch channels.
In the above technical solution, the three-dimensional hydraulic numerical simulation software may be Flow3D software.
In the above technical solution, in the step ②③ of determining the height of the overflow dam, the natural incoming flow is preferably the minimum flow of the target river reach running in the non-dead water period for the past year (for example, 10-30 years), and the complementary flow is the difference between the ecological flow of the target river reach and the minimum flow of the target river reach running in the past year.
For example, when the target river reach is located downstream of the dam, the natural inflow flow is preferably the minimum outflow flow of the dam operated in the non-dead water period for years (for example, 10 to 30 years), and the water supplementing flow is the difference between the ecological flow of the target river reach and the minimum outflow flow of the dam operation. Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
1. The invention provides a method for improving bifurcate river water flow conditions by combining an ecological water supplementing port with an overflow dam, which is suitable for the condition that a target river reach is bifurcate river reach of a river and a main flow of the target river reach cannot be provided with the water supplementing port due to the limitation of engineering conditions. The invention can solve the problem that the setting position of the water supplementing port is easily limited by engineering conditions and cannot effectively improve the water flow condition of bifurcate river reach when water supplementing is carried out on anabranch channels in the prior art by combining the water supplementing port with the overflow dam.
2. According to the invention, through a numerical simulation mode, the water supplementing port is arranged on the branch channel of the bifurcate river reach, and the overflow dam with proper height is arranged at the water supplementing port and the junction of the main flow and the branch channel of the bifurcate river reach, so that the water flow condition of the main flow of the bifurcate river reach can be effectively improved, and the aquatic habitat of the main flow and the branch channel can be improved. For the river reach needing navigation, the main stream navigation rate of bifurcate river reach can be effectively ensured, and for the urban river reach, the urban landscape effect can be improved.
3. The method can be used for improving the water replenishing benefit of the water replenishing engineering with the water replenishing port arranged on the branch road of the bifurcate river reach, is also suitable for the new water replenishing engineering of the bifurcate river reach without the water replenishing port, has diversified applicable situations and simple operation, and is favorable for popularization and application in practice.
Drawings
FIG. 1 is a schematic illustration of a target river reach according to an embodiment;
FIG. 2 is a schematic illustration of the water make-up of a target river reach using the method of the present invention;
in fig. 1 to 2, 1 is a main flow, 2 is a branched flow, 3 is a water supply flow, 4 is a water supply port, 5 is a river, 6 is a junction of the branched flow and the main flow, 7 is an overflow dam, 8 is a branched flow, and the arrow direction indicates the flow direction.
Fig. 3 is a schematic structural view of the overflow dams provided in the working conditions 3 and 4.
Fig. 4 (a) and (B) are water depth and flow velocity distribution diagrams of the working condition 1, and fig. 4 (C) and (D) are flow charts of the working condition 1 at the branching port and the junction port.
Fig. 5 (a) and (B) are water depth and flow velocity distribution diagrams of the working condition 2, and fig. 5 (C) and (D) are flow charts of the working condition 2 at the branching port and the junction port.
Fig. 6 (a) and (B) are water depth and flow velocity distribution diagrams of the working condition 3, and fig. 6 (C) and (D) are flow charts of the working condition 3 at the branching port and the junction port.
Fig. 7 (a) and (B) are water depth and flow velocity distribution diagrams of the working condition 4, and fig. 7 (C) and (D) are flow charts of the working condition 4 at the branching port and the junction port.
Detailed Description
The method for improving bifurcate river water flow conditions by combining the ecological water supplementing port with the overflow dam is further described by the following embodiment. It is to be noted that the following examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, since numerous insubstantial modifications and variations of the present invention may be made by those skilled in the art in light of the above teachings, and still fall within the scope of the invention.
Example 1
In this example, the water flow condition of bifurcate river channels is improved by the method of the invention.
In this embodiment, the target river reach is a bifurcate river reach, and the schematic diagram of the target river reach is shown in fig. 1, 1 is a main flow, 2 is a branch channel, 3 is a water supplementing flow, 4 is a water supplementing port, 5 is a river center continent, 6 is a junction of the branch channel and the main flow, and the arrow direction indicates the flow direction. Because of the limitation of engineering conditions, a water supplementing port cannot be arranged on the main stream of the target river reach, and when water is supplemented through the water supplementing port arranged on the branch channel, the effect of effectively improving the main stream water flow condition is difficult to achieve. This embodiment is intended to improve upon this problem by the method of the present invention.
Collecting topographic data and hydrological data of a target river reach, establishing a mathematical model by using the topographic data, and calculating hydrological conditions of the area after the water replenishing engineering is not operated and the water replenishing engineering is operated by using Flow3D software in combination with the hydrological data. And (3) comparing and analyzing flow fields of upstream branch channels (area I) and downstream branch channels (area II) of different working conditions, and flow rates of the branch channel section A and the main flow section B, wherein schematic diagrams of positions of the area I, the area II, the branch channel section A and the main flow section B are shown in a diagram in fig. 4 (A), and a proper water supplementing scheme is selected according to simulation situation ratio.
Numerical simulations were performed according to the conditions in table 1, and the results of the resin simulations are shown in table 2. The working condition 1 is the condition that water supplementing and overflow dams are not arranged, the working condition 2 is the condition that water supplementing ports are arranged on a branch road of a target river reach and water is supplemented through the water supplementing ports, the working condition 3 and the working condition 4 are the condition that the overflow dams are arranged between the water supplementing ports of the target river reach and the junction ports of a branch road and a main stream and water is supplemented through the water supplementing ports, as shown in fig. 2, 1 is the main stream, 2 is the branch road, 3 is water supplementing flow, 4 is the water supplementing ports, 5 is the river center continent, 6 is the junction ports of the branch road and the main stream, 7 is the overflow dams, 8 is the branch road, and the arrow direction indicates the water flow direction. The structures of the overflow dams arranged in the working condition 3 and the working condition 4 are shown in two diagrams of (A) and (B) of fig. 3, the width of the overflow dam is equal to the width of a branch channel where the overflow dam is arranged, wherein the height of the overflow dam in the working condition 3 is 3m, and the height of the overflow dam in the working condition 4 is 1.5m.
Table 1 calculation condition setting table
TABLE 2 hydrodynamic Condition calculation results for each Condition
The statistics of the numerical simulation results of the working condition 1 are shown in table 2, the water depth and the flow velocity distribution of the working condition 1 are shown in two graphs of (A) and (B) of fig. 4, and the flow charts of the working condition 1at the branch ports and the sink ports are shown in two graphs of (C) and (D) of fig. 4. Under the condition of no water supplement (namely working condition 1), the flow rate of the branch channel section A is slow, the average flow rate is 0.03m/s, the average water depth of the branch channel section A is 2.00m, and the flow rate of the branch channel section A is 15m 3/s; the average flow velocity of the main flow section B is 0.14m/s, the average water depth of the main flow section B is 3.19m, and the flow rate of the main flow section B is 267m 3/s. The split ratio of the channels was 5.3%. According to hydrological data investigation, in recent decades, the upstream and downstream drainage flow of a target river reach is difficult to meet the requirement of 490m 3/s for the lowest downstream drainage flow in the dead water period; on the other hand, in the flow leaked from the upstream, a part of the flow is split by the branched channels, so that the main flow and the branched channels cannot guarantee the aquatic habitat and the navigation requirements.
The statistics of the numerical simulation results of the working condition 2 are shown in table 2, the water depth and the flow velocity distribution of the working condition 2 are shown in two graphs of (A) and (B) of fig. 5, and the flow charts of the working condition 2 at the branch ports and the sink ports are shown in two graphs of (C) and (D) of fig. 5. The water is supplemented on the basis of the working condition 1, and compared with the water before the water is supplemented (working condition 1), the flow, the average flow speed and the average water depth of the channel section A are respectively increased by 57m 3/s, 0.08m/s and 0.12m, and the relative change rate is 380%, 266.7% and 6.0%; the flow, average flow speed and average water depth of the main flow section B are respectively increased by 87m 3/s, 0.02m/s and 0.02m, and the relative change rates are respectively 32.6%, 14.3% and 0.6%. When water is replenished through the water replenishing port at the flow rate of 202m 3/s, 72m 3/s water replenishing flow rate flows from the channel path region I to the main flow, and the partial flow rate improves the aquatic environment for the channel and improves the navigation condition for the main flow. However, the water supplementing flow of 136m 3/s flows directly from the region II to the junction, the water supplementing flow does not have the water supplementing effect on the cross section A of the branch channel and the cross section B of the main flow, and the flow rates of the water supplementing flow flowing through the region I and the region II are 34.6% and 65.4% respectively.
The statistics of the numerical simulation results of the working condition 3 are shown in table 2, the water depth and the flow velocity distribution of the working condition 3 are shown in two graphs of (A) and (B) of fig. 6, and the flow charts of the working condition 3 at the branch ports and the sink ports are shown in two graphs of (C) and (D) of fig. 6. After the overflow dam is arranged on the basis of water supplement of the working condition 2, compared with the working condition 2, the flow, the average flow velocity and the average water depth of the branched channel section A are respectively increased by 136m 3/s, 0.16m/s and 0.81m, and the relative change rates are respectively 180.9%, 145.5% and 38.2%; the flow rate and the section average flow velocity of the main flow section B are respectively increased by 136m 3/s and 0.07m/s, the relative change rates are respectively 38.4% and 43.8%, and the average water depth of the main flow section B is not obviously changed. When water is replenished through the water replenishing port at the flow rate of 202m 3/s, all the flow rate flows from the branch channel through the area I to the main flow, and the flow rate of the branch channel improves the aquatic environment and improves the navigation condition for the main flow. However, as all the water supplementing flow is blocked by the overflow dam, the river connectivity at the junction of the branch channel and the main flow is blocked, and the maintenance of the aquatic habitat is not facilitated.
The statistics of the numerical simulation results of the working condition 4 are shown in table 2, the water depth and the flow velocity distribution of the working condition 4 are shown in two graphs of (A) and (B) of fig. 7, and the flow charts of the working condition 4 at the branch ports and the sink ports are shown in two graphs of (C) and (D) of fig. 7. After the overflow dam is arranged on the basis of water supplement of the working condition 2, compared with the working condition 2, the flow, the average flow speed and the average water depth of the branched channel section A are respectively increased by 65m 3/s, 0.09m/s and 0.24m, and the relative change rates are respectively 92.3%, 81.8% and 11.3%; the flow and the average flow velocity of the main flow section B are respectively increased by 65m 3/s and 0.02m/s, the relative change rates are respectively 18.4% and 12.5%, and the average water depth of the main flow section B is not obviously changed. When water is replenished at a flow rate of 202m 3/s through the water replenishing port, a water replenishing flow rate of 137m 3/s flows from the branch channel through the area I to the main flow, and a flow rate of 71m 3/s flows to the downstream of the branch channel through the overflow dam and is converged into the converging port. The flow rates of the make-up water flowing through the region I and the region II are 65.9% and 34.1% respectively. Under the working condition, the water supplementing benefit is effectively improved relative to the working condition 2, the connectivity of the branch channel and the main flow of the target river reach at the junction is not blocked, the water flow conditions of the branch channel and the main flow are improved, and favorable conditions can be provided for the aquatic habitat and the navigation at the same time.
Through comparing the above numerical simulation, the water supplementing effect of the water supplementing process on the main river channel and the branch channel of the bifurcate river reach can be effectively improved by combining water supplementing at the water supplementing port with the overflow dam, but under the condition of working condition 3, the overflow dam is too high, so that the longitudinal communication of the river is damaged, and the water ecological environment is not facilitated. Under the condition of working condition 4, the overflow dam is proper in height, so that the flow ratio of the water replenishing flow flowing through the area I is effectively improved, the water replenishing engineering benefit is improved, the longitudinal communication of the river channel of the area II is ensured, and the comprehensive water replenishing benefit is better. Comprehensive analysis shows that the scheme of the overflow dam with proper water replenishing combination height, such as working condition 4, can effectively improve the flow and hydraulic conditions of the main flow and the branch channels and ensure the longitudinal communication of the branch channels.
Claims (6)
1. The method for improving the water flow condition of bifurcate river channels by combining ecological water supplementing ports with overflow dams is characterized in that a target river channel is a bifurcate river channel of a river channel, a main flow of the target river channel cannot be provided with the water supplementing ports due to the limitation of engineering conditions, the water supplementing ports are arranged on branch channels of the target river channel, overflow dams are arranged between the water supplementing ports of the target river channel and the junction between a branch channel and the main flow, the water level of the branch channel is high through the overflow dams, so that water flow supplemented by the water supplementing ports flows back to a branch channel from the branch channel and enters the main flow of the target river channel to supplement water for the main flow, and the water flow condition and aquatic habitat of the target river channel are improved; the height of the overflow dam is such that a portion of the water flow fed through the water supply port is reversed from the branch channel to the branch channel and into the main stream of the target river, and the remainder of the water flow fed through the water supply port flows through the overflow dam into the junction region of the branch channel and the main stream.
2. The method for improving the water flow condition of bifurcate river channels by combining an ecological water supplementing port with an overflow dam according to claim 1, wherein the height of the overflow dam is required to ensure that 50% -80% of the water flow supplemented by the water supplementing port flows back from the branch channel to the branch channel and enters the main stream of the target river reach, and 20% -50% of the water flow supplemented by the water supplementing port flows through the overflow dam to enter the junction area of the branch channel and the main stream.
3. The method for improving bifurcate river flow conditions by an ecological water replenishment in combination with an overflow dam according to claim 1 or 2 wherein the height of the overflow dam is determined by numerical simulation.
4. A method for improving bifurcate river flow conditions by an ecological water replenishment in combination with an overflow dam as defined in claim 3 wherein the height of the overflow dam is determined as follows:
① Collecting hydrological data and topographic data of a target area, and constructing a mathematical model of the target area by utilizing three-dimensional hydraulic numerical simulation software;
② Constructing an overflow dam between a water supplementing port and a branch channel of a target river reach and a converging port of a main stream in a mathematical model, and simulating the hydraulic factors of the main stream and the branch channel of the target river reach under natural inflow and water supplementing flow after constructing the overflow dam;
③ Changing the height of the overflow dam in the mathematical model, repeating the operation of the step ②, and simulating the hydraulic factors of the main flow and the branch channel of the target river reach under the natural inflow flow and the complementary water flow after the overflow dam is constructed;
④ Comparing the improvement degree of the overflow dams with different heights in the step ②③ on the main stream and the water flow conditions of the branch channels of the target river reach, and selecting the height of the overflow dam capable of effectively improving the main stream and the water flow conditions of the branch channels of the target river reach as the height of the overflow dam of the target river reach.
5. The method of improving bifurcate river flow conditions by an ecological water replenishment in combination with an overflow dam as defined in claim 4 wherein in step ②③ of determining the height of the overflow dam, the hydrodynamic factors include the levels, flow rates and flow rates of the main and branch channels.
6. The method for improving a water flow condition in a bifurcate river by an ecological water filling port in combination with an overflow dam according to claim 4 or 5, wherein in the step ②③ of determining the height of the overflow dam, the natural incoming flow is a minimum flow of the target river reach which is operated in a non-dead water period in the past year, and the water filling flow is a difference between the ecological flow of the target river reach and the minimum flow of the target river reach which is operated in the past year.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310131615.7A CN116163262B (en) | 2023-02-18 | 2023-02-18 | Method for improving bifurcate river water flow conditions through ecological water supplementing port combined with overflow dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310131615.7A CN116163262B (en) | 2023-02-18 | 2023-02-18 | Method for improving bifurcate river water flow conditions through ecological water supplementing port combined with overflow dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116163262A CN116163262A (en) | 2023-05-26 |
| CN116163262B true CN116163262B (en) | 2024-06-11 |
Family
ID=86410928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310131615.7A Active CN116163262B (en) | 2023-02-18 | 2023-02-18 | Method for improving bifurcate river water flow conditions through ecological water supplementing port combined with overflow dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116163262B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116993008B (en) * | 2023-07-26 | 2024-03-22 | 水利部海河水利委员会水资源保护科学研究所 | River channel ecological water supplementing optimization method for promoting water conservation |
| CN117408188B (en) * | 2023-12-14 | 2024-03-19 | 江西省水利科学院(江西省大坝安全管理中心、江西省水资源管理中心) | Method for predicting flow of trapezoid overflow dam through computational fluid dynamics |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1181280A (en) * | 1997-09-02 | 1999-03-26 | Hazama Gumi Ltd | Dam construction |
| KR20090111975A (en) * | 2008-04-23 | 2009-10-28 | 재단법인서울대학교산학협력재단 | Method for calculating total maximum daily load using instreamflow requirement |
| JP2012172312A (en) * | 2011-02-17 | 2012-09-10 | National Agriculture & Food Research Organization | Diversion mechanism of water channel |
| CN102888824A (en) * | 2012-10-18 | 2013-01-23 | 河海大学 | Determination method of branched channel dredging scale for stabilizing branched channel splitting ratio |
| JP3191636U (en) * | 2014-04-21 | 2014-07-03 | 株式会社東京建設コンサルタント | Drainage system |
| CN104074166A (en) * | 2014-07-09 | 2014-10-01 | 青岛环境工程设计院有限公司 | Method for recovering dried-up river |
| CN204940223U (en) * | 2015-05-27 | 2016-01-06 | 中国电建集团贵阳勘测设计研究院有限公司 | River course water-reducing river reach fish habitat protection structure |
| CN205088645U (en) * | 2015-11-13 | 2016-03-16 | 中国电建集团成都勘测设计研究院有限公司 | A return water sinks husky water diversion structure for power station |
| CN105951660A (en) * | 2016-06-20 | 2016-09-21 | 中国电建集团贵阳勘测设计研究院有限公司 | Comprehensive protection system for fish habitat of upstream and downstream and main and branch streams of reservoir |
| CN108277783A (en) * | 2017-12-27 | 2018-07-13 | 长江勘测规划设计研究有限责任公司 | Fish pass moisturizing attracting structure and its moisturizing attracting method |
| CN110453652A (en) * | 2019-08-27 | 2019-11-15 | 中水北方勘测设计研究有限责任公司 | A method of the Reservoir region of processing karst area disappears water burst hole |
| CN110984064A (en) * | 2019-11-25 | 2020-04-10 | 长沙理工大学 | Method for improving river channel Jiangxin continental tail ship navigation water flow conditions |
| CN112127325A (en) * | 2020-08-25 | 2020-12-25 | 中国水利水电科学研究院 | Converging port rectifying device |
| CN215562299U (en) * | 2021-05-13 | 2022-01-18 | 广东省水利水电科学研究院 | Dam type for separating branch river channel adjusting water flow structure |
| CN114438958A (en) * | 2022-03-18 | 2022-05-06 | 交通运输部天津水运工程科学研究所 | Branched channel type approach channel arrangement method considering ecological and navigation benefits |
| CN114611846A (en) * | 2022-05-16 | 2022-06-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Multi-mode ecological water replenishing system and method for new urban area |
| JP7127791B1 (en) * | 2022-04-11 | 2022-08-30 | 株式会社美鷹 | Channel system for backwater countermeasures |
| CN115307690A (en) * | 2022-08-11 | 2022-11-08 | 西北农林科技大学 | Weir groove combined water measuring facility |
| CN115630503A (en) * | 2022-10-22 | 2023-01-20 | 南方海洋科学与工程广东省实验室(广州) | Ecological pond reservoir plant purification effect simulation method based on water circulation optimization |
-
2023
- 2023-02-18 CN CN202310131615.7A patent/CN116163262B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1181280A (en) * | 1997-09-02 | 1999-03-26 | Hazama Gumi Ltd | Dam construction |
| KR20090111975A (en) * | 2008-04-23 | 2009-10-28 | 재단법인서울대학교산학협력재단 | Method for calculating total maximum daily load using instreamflow requirement |
| JP2012172312A (en) * | 2011-02-17 | 2012-09-10 | National Agriculture & Food Research Organization | Diversion mechanism of water channel |
| CN102888824A (en) * | 2012-10-18 | 2013-01-23 | 河海大学 | Determination method of branched channel dredging scale for stabilizing branched channel splitting ratio |
| JP3191636U (en) * | 2014-04-21 | 2014-07-03 | 株式会社東京建設コンサルタント | Drainage system |
| CN104074166A (en) * | 2014-07-09 | 2014-10-01 | 青岛环境工程设计院有限公司 | Method for recovering dried-up river |
| CN204940223U (en) * | 2015-05-27 | 2016-01-06 | 中国电建集团贵阳勘测设计研究院有限公司 | River course water-reducing river reach fish habitat protection structure |
| CN205088645U (en) * | 2015-11-13 | 2016-03-16 | 中国电建集团成都勘测设计研究院有限公司 | A return water sinks husky water diversion structure for power station |
| CN105951660A (en) * | 2016-06-20 | 2016-09-21 | 中国电建集团贵阳勘测设计研究院有限公司 | Comprehensive protection system for fish habitat of upstream and downstream and main and branch streams of reservoir |
| CN108277783A (en) * | 2017-12-27 | 2018-07-13 | 长江勘测规划设计研究有限责任公司 | Fish pass moisturizing attracting structure and its moisturizing attracting method |
| CN110453652A (en) * | 2019-08-27 | 2019-11-15 | 中水北方勘测设计研究有限责任公司 | A method of the Reservoir region of processing karst area disappears water burst hole |
| CN110984064A (en) * | 2019-11-25 | 2020-04-10 | 长沙理工大学 | Method for improving river channel Jiangxin continental tail ship navigation water flow conditions |
| CN112127325A (en) * | 2020-08-25 | 2020-12-25 | 中国水利水电科学研究院 | Converging port rectifying device |
| CN215562299U (en) * | 2021-05-13 | 2022-01-18 | 广东省水利水电科学研究院 | Dam type for separating branch river channel adjusting water flow structure |
| CN114438958A (en) * | 2022-03-18 | 2022-05-06 | 交通运输部天津水运工程科学研究所 | Branched channel type approach channel arrangement method considering ecological and navigation benefits |
| JP7127791B1 (en) * | 2022-04-11 | 2022-08-30 | 株式会社美鷹 | Channel system for backwater countermeasures |
| CN114611846A (en) * | 2022-05-16 | 2022-06-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Multi-mode ecological water replenishing system and method for new urban area |
| CN115307690A (en) * | 2022-08-11 | 2022-11-08 | 西北农林科技大学 | Weir groove combined water measuring facility |
| CN115630503A (en) * | 2022-10-22 | 2023-01-20 | 南方海洋科学与工程广东省实验室(广州) | Ecological pond reservoir plant purification effect simulation method based on water circulation optimization |
Non-Patent Citations (5)
| Title |
|---|
| 和畅洲汊道近期演变及航道整治方案设想;杨芳丽;付中敏;朱立俊;陈飞;;泥沙研究;20120815(04);全文 * |
| 城市水生态修复工程生态需水量分析;王晨阳;《北京师范大学学报（自然科学版）》;20210630;第57卷(第3期);390-398 * |
| 广州某流域黑臭河涌综合治理工程案例分析;陈涛;陈浩;鲁帅;刘唯;;资源节约与环保;20200925(09);全文 * |
| 汾河水景设计;李雁;山西建筑;20030915(17);全文 * |
| 溢流丁坝附近自由水面的实验研究与数值模拟;李志勤, 李洪, 李嘉, 李然;水利学报;20030828(08);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116163262A (en) | 2023-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116163262B (en) | Method for improving bifurcate river water flow conditions through ecological water supplementing port combined with overflow dam | |
| WO2021129039A1 (en) | Method and system for calculating cross-reservoir drainage basin river runoff | |
| CN111027264A (en) | Plain district urban river network water circulation regulation and control method based on ecological restoration target | |
| CN112101818B (en) | Sponge city flood optimal scheduling method suitable for complex hydraulic connection | |
| CN111027226B (en) | Water sand numerical simulation calculation method for pumped storage power station | |
| CN112785087B (en) | Water flow optimization scheduling plan compilation method for cross-basin water transfer project with hydraulic response characteristics considered | |
| CN104933268B (en) | A kind of flood risk analysis method based on d Unsteady Water Flow numerical model | |
| CN110210109B (en) | Numerical simulation method and system for reverse water flow of weir gate engineering in river network | |
| CN114997591A (en) | River pollutant reduction and river channel section water quality prediction method and device based on water environment mathematical model | |
| CN108665114A (en) | A kind of plain river network pollution of area source water quality method of response calculation based on virtual contact | |
| CN205475065U (en) | Tower import crowd combined layout structure of steep narrow many holes of river valley of side slope bank | |
| CN113779671B (en) | Open channel water transfer engineering hydrodynamic force real-time calculation method based on space-time step length self-adaptive technology | |
| CN204185835U (en) | Power station free pressure flow tail water discharge | |
| CN117952388A (en) | River network living sluice station joint optimization scheduling method based on minimum ecological flow velocity | |
| CN103205954A (en) | Well inlet/outlet structure for pumped storage power stations | |
| CN116956763A (en) | Water delivery aqueduct water level lowering and flow increasing method based on regulation and control of downstream water return gate | |
| CN106295041A (en) | River system network drawing drawing method in regional water conservancy planning | |
| CN115809562A (en) | Method for determining scale scheme of small watershed water diversion ditch | |
| CN113743032A (en) | Method for determining optimal running water circulation scheme of urban river network based on MIKE 11 | |
| CN112580230B (en) | Reservoir water temperature structure analysis method | |
| CN112818438A (en) | River channel model based on SWMM and scheduling simulation generalization method thereof | |
| CN105735211A (en) | Water conservancy and hydropower project arrangement structure beneficial to reduction of gas super-saturation of water | |
| Yu et al. | Evaluation of river connectivity based on TOPSIS model: Taking the North District Expansion Zone of Zhangjiagang Economic Development Zone in Jiangsu Province as an Example | |
| CN220953283U (en) | High-low bank structure for diversion ecological flow of tail water of power station | |
| CN117852977B (en) | Water resource simulation and regulation method with dual quality control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |