CN112227292A - Intelligent analysis method for water choking of open-web arch bridge based on one-dimensional hydrodynamic model - Google Patents
Intelligent analysis method for water choking of open-web arch bridge based on one-dimensional hydrodynamic model Download PDFInfo
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Abstract
The invention relates to an intelligent analysis method for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model. The invention aims to provide an intelligent analysis method for the water congestion of an open-web arch bridge based on a one-dimensional hydrodynamic model so as to accurately and scientifically determine the overflowing capacity of a main hole and an arch bridge tunnel of the open-web arch bridge under different flood flows. The technical scheme of the invention is as follows: s1, determining a simulation area; s2, converting the simulation area into data; s3, obtaining a one-dimensional hydrodynamic model of the simulation area according to the digitalized simulation area, wherein the generalization of the hollow arch bridge adopts a mode of adding weirs to a plurality of culverts; s4, verifying and parameter correcting the one-dimensional hydrodynamic model of the generalized hydraulic structure with the open-web arch bridge through historical flood data; and S5, according to different designed inflow conditions, obtaining corresponding flood levels near each affected object through the verified and parameter-corrected one-dimensional hydrodynamic model. The method is suitable for the field of flood control influence evaluation of flood control projects and wading buildings.
Description
Technical Field
The invention relates to an intelligent analysis method for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model. The method is suitable for the field of flood control influence evaluation of flood control projects and wading buildings.
Background
At present, the method for calculating the bridge water damming by utilizing the one-dimensional hydrodynamic model is widely applied to the design of projects such as flood control projects and flood control influence evaluation of wading buildings and the like and the argument of related evaluation topics.
However, the bridge water damming calculation method in the prior art has the following defects: the method has good calculation effect on the backwater of the flat plate bridge, but can not accurately generalize the clear width of the riverway before and after the bridge is built on the non-rectangular cross-section bridge, so that the backwater characteristic of the hollow arch bridge can not be accurately simulated.
The patent application number 201710231961.7 discloses a method for judging influence of a bridge on river water resistance based on river energy, and provides a method for judging influence of the bridge on river water resistance based on river energy, but because the method is established on indexes of bridge water resistance ratio and Froude number, the bridge water resistance ratio and the Froude number under different flow and water level conditions cannot be directly calculated for a non-rectangular cross-section bridge, and therefore the method adopted by the patent cannot accurately calculate the water blocking characteristic of an open-web arch bridge under different flow and water level conditions.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, an intelligent analysis method for the water congestion of the hollow arch bridge based on a one-dimensional hydrodynamic model is provided to accurately and scientifically determine the overflowing capacity of the main hole and the arch bridge tunnel of the hollow arch bridge under different flood flows.
The technical scheme adopted by the invention is as follows: an intelligent analysis method for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model is characterized by comprising the following steps:
s1, determining a simulation area;
s2, converting the simulation area into data;
s3, obtaining a one-dimensional hydrodynamic model of the simulation area according to the digitalized simulation area, wherein the generalization of the hollow arch bridge adopts a mode of adding weirs to a plurality of culverts;
s4, verifying and parameter correcting the one-dimensional hydrodynamic model of the generalized hydraulic structure with the open-web arch bridge through historical flood data;
and S5, according to different designed inflow conditions, obtaining corresponding flood levels near each affected object through the verified and parameter-corrected one-dimensional hydrodynamic model.
Step S1 includes:
analyzing the position of the hollow arch bridge and the scale of the river channel, determining the influence range of the upstream and downstream water levels, and properly extending the influence range to a river reach with smooth water flow to form a simulation area.
Step S2 includes:
acquiring the conditions of the terrain, the surface feature, the water body and the water conservancy condition in the simulation area, performing datamation on the terrain, the surface feature, the water body and the water conservancy condition in the simulation area, generating terrain scatter points containing the terrain and the hydraulic structure in the simulation area, and converting the scatter point terrain into a section file supported by MIKE 11.
Step S3 includes:
and (3) introducing the section file established in the step S2 into the MIKE11, generating a basic numerical model of the simulation area, establishing a river network file for the basic numerical model of the simulation area, and setting a hydraulic structure, a water level flow boundary, a bottom resistance parameter, an initial parameter and a solving format in the river network model to obtain a one-dimensional hydrodynamic model of the simulation area, wherein the generalization of the fasting arch bridge adopts a form of adding a weir to a plurality of culverts.
Step S4 includes:
modifying the section condition in the one-dimensional hydrodynamic model established in the step S3 into the section condition under the historical flood condition;
inputting the inflow flow and the outflow water level recorded in the historical data into the modified one-dimensional hydrodynamic model to obtain a simulated flood level under the condition recorded in the historical data;
and comparing the simulated flood level with the actual flood level recorded by the historical data, if the simulated flood level is compared with the actual flood level recorded by the historical data, and if the simulated flood level does not meet the precision requirement, adjusting the comprehensive roughness of the section and the head loss coefficient of the culvert generalized bridge until the simulation result meets the precision requirement.
Step S5 includes:
modifying the fracture surface conditions in the one-dimensional hydrodynamic model verified and parameter-modified in the step S4 back to the fracture surface determined in the step S3;
different inflow conditions are designed and input into the MIKE11, and the MIKE11 obtains the flood level near the upstream and downstream interested objects of the fasting arch bridge under the one-dimensional hydrodynamic model after verification and parameter correction.
The one-dimensional hydrodynamic model equation of the one-dimensional unsteady flow numerical model is as follows:
in the formula: b is water surface width, Z is water level, Q is flow, Q is side inflow, v is section average flow velocity, g is gravity acceleration, A is water passing section area, and K is flow modulus of the water passing section.
An intelligent analysis device for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model is characterized in that: the method comprises the following steps:
the simulation area determining module is used for determining a simulation area;
the data module is used for converting the simulation area into data;
the modeling module is used for obtaining a one-dimensional hydrodynamic model of the simulation area according to the digitalized simulation area, wherein the generalization of the fasting arch bridge adopts a mode of adding a weir in a plurality of culverts;
the model verification and correction module is used for verifying and correcting parameters of a one-dimensional hydrodynamic model of a generalized hydraulic structure with the open-web arch bridge according to historical flood data;
and the model calculation module is used for obtaining the corresponding flood level near each influence object through the verified and parameter-corrected one-dimensional hydrodynamic model according to different designed inflow conditions.
A storage medium having a computer program stored thereon, characterized in that: and when being executed by a processor, the computer program realizes the steps of the method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model.
And when being executed by a processor, the computer program realizes the steps of the method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model.
The invention has the beneficial effects that: by adopting the one-dimensional hydrodynamic model, the flood level of the upstream and the downstream of the object of interest under various working conditions can be continuously and rapidly simulated.
The hydraulic structure is introduced into the one-dimensional hydrodynamic model in a culvert and weir adding mode, the main bridge arch and the open shoulder arch of the hollow arch bridge are generalized by a plurality of culverts, and the bridge floor is generalized in a weir mode, so that the water passing characteristic parameters of the hollow arch bridge under different water level conditions can be conveniently introduced into the one-dimensional hydrodynamic model, and the flood level is influenced. Therefore, the method can accurately simulate the flood level of the attention objects at the upstream and the downstream of the hollow arch bridge at different flow rates, and further can analyze the backwater characteristic of the hollow arch bridge.
Drawings
FIG. 1 is a flow chart of an embodiment.
Fig. 2 is a schematic cross-sectional view of the hollow arch bridge of the embodiment.
Fig. 3 is a schematic cross-sectional view of the grooved hollow arch bridge according to the embodiment.
In the figure: 1. a main bridge arch; 2. a bridge shoulder arch; 3. closing the ring; 4. a culvert; 5. river channel section; 6. and (4) draining the groove.
Detailed Description
As shown in fig. 1, the present embodiment is an intelligent analysis method for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model, which specifically includes the following steps:
s1, determining a simulation area: analyzing the position of the hollow arch bridge and the scale of the river channel, determining the influence range of the upstream and downstream water levels, and properly extending the influence range to a river reach with smooth water flow to form a simulation area.
S2, converting the simulation area into data: acquiring the conditions of the terrain and the surface features of the simulation area (by surveying and collecting data), and carrying out datamation on the terrain, the landform, the surface features, the water body and the water conservancy conditions in the simulation area to generate terrain scattered points containing the terrain and the hydraulic structures in the simulation area; and then (through an engineering software toolkit) converting the scatter landform into a profile file supported by MIKE 11.
MIKE11 is a one-dimensional hydrodynamic simulation software commonly used in the hydraulic engineering field. The hydraulic building module is unique, and hydraulic buildings in different shapes such as culverts, barrages, gates and bridges can be added into the river channel model, so that the concrete problems of control, drainage, water blockage and the like of the hydraulic buildings are analyzed.
S3, establishing a one-dimensional hydrodynamic model, and generalizing the hollow arch bridge in the form of adding weirs to a plurality of culverts: and (3) introducing the section file established in the step S2 into the MIKE11, generating a basic numerical model of the simulation area, establishing a river network file for the basic numerical model of the simulation area, and setting hydraulic structures (culverts and barrages), a water level flow boundary, a bottom resistance parameter, an initial parameter and a solving format in the river network model to obtain a one-dimensional hydrodynamic model of the simulation area.
In the embodiment, the hollow arch bridge on the river channel is generalized into a culvert and weir mode to simulate the water passing characteristic, wherein the culvert can simulate bridge holes of different types, including rectangle, city gate opening, semicircle, inverted trapezoid and the like, and the number of the culverts can be increased at will; the weir simulates the bridge deck water passing characteristic.
The equation set of the one-dimensional hydrodynamic model of the one-dimensional unsteady flow numerical model in this example is as follows:
in the formula: b is water surface width, Z is water level, Q is flow, Q is side inflow, v is section average flow velocity, g is gravity acceleration, A is water passing section area, and K is flow modulus of the water passing section.
S4, verifying and parameter correcting the one-dimensional hydrodynamic model of the generalized hydraulic structure with the hollow arch bridge according to historical flood data:
modifying the section condition in the one-dimensional hydrodynamic model established in the step S3 into the section condition under the historical flood condition;
inputting the inflow flow and the outflow water level recorded in the historical data into the modified one-dimensional hydrodynamic model to obtain a simulated flood level under the condition recorded in the historical data;
and comparing the simulated flood level with the actual flood level recorded by the historical data, and if the simulated flood level is not meeting the precision requirement compared with the actual flood level recorded by the historical data, adjusting the comprehensive roughness of the section and the head loss coefficient of the culvert generalized bridge until the simulation result meets the precision requirement.
S5, obtaining flood levels near the upstream and downstream attention objects of the hollow arch bridge through intelligent analysis of bridge water blockage:
modifying the fracture surface conditions in the one-dimensional hydrodynamic model verified and parameter-modified in the step S4 back to the fracture surface determined in the step S3;
different inflow conditions are designed and input into the MIKE11, and the MIKE11 obtains the corresponding flood levels near each affected object under the one-dimensional hydrodynamic model after verification and parameter correction.
In this embodiment, the flood of the taishunshi actinolite dragon bridge is used as an analysis object, and the specific analysis method includes the following steps:
s1, determining a simulation area:
in the area of the project, the influence of the Stone dragon bridge on the upstream and downstream water levels and the water flow situation of the Shiyang stream is considered, and the main simulation range is determined to be from Wenfu bridge to Shilongqiao downstream Shiyang stream river channel area. The main flood control influence objects in the region are bridges, dikes and flood control objects in corresponding upstream regions. The calculated length is about 3.2 km.
S2, simulating area datamation:
on the basis of actually measuring the topographic map of the area, the range of the simulation area is subjected to detailed investigation, the field conditions are comprehensively mastered, relevant hydrological and water conservancy data are widely collected, and deep investigation and research are carried out on main influence factors such as the upper boundary, the lower boundary and the bridge of the simulation area. And then converting parameters such as terrain, landform, surface feature, water body, water conservancy condition and the like in the simulation area into a vector topographic map containing information of the terrain, the landform, the surface feature, the water body and the water conservancy condition in the simulation area through Auto CAD software.
And then outputting the obtained vector topographic map as an xyz-format data file supported by an MIKE11 engineering software toolkit, and converting the xyz-format data file into a section data file capable of running in an MIKE11 through a self-compiled data processing table.
The boundaries of the simulation region are: the upper boundary is from the Wenfu bridge and the lower boundary is from the lower part of the Stone dragon bridge.
Under the condition of high standard flood, the bridge deck of the dragon in the research area overflows to flood, the main bridge arch 1 and the open shoulder arch 2 can be subjected to complete flooding flow, partial flooding flow, critical flow, hole flow, free outflow and the like, and the flood flow state is relatively complex.
S3, establishing a one-dimensional hydrodynamic model
And generating a river channel model in the simulation area range in MIKE11, importing the section file generated in the step S2, and adding a hollow arch bridge generalized hydraulic building model into the model to obtain a one-dimensional hydrodynamic model of the simulation area. The method comprises the following steps:
s3.1 river channel model
And storing the river channel center line in the simulation area range into an shp file format through GIS software. And opening MIKE11, importing an shp file as a background, and drawing a river channel along the center line of the river channel to form a primary river network file. And importing the profile file established in the step S2 into the MIKE11 to form a one-dimensional hydrodynamic model of the simulation area.
S3.2, hydraulic building model
According to the geometrical shapes of a main bridge arch 1 and a bridge shoulder arch 2 of the stone dragon bridge, the actually measured cross section of the stone dragon bridge is generalized into a plurality of culverts 4 with different sizes, wherein the largest culverts represent closed rings 3 (shown in figure 2) formed by the bridge arches and a river channel cross section 5, and the rest 7 small culverts represent No. 1 to No. 7 bridge culverts of the stone dragon bridge respectively.
S3.3, boundary definition
The range of the one-dimensional simulation is that the upper boundary of the river channel starts from the Wenfu bridge, the lower boundary of the river channel reaches the downstream of the Stone Dragon bridge, the total length of the river channel in the calculation range is about 3.2km, and 4 bridges (the Wenfu bridge, the Shiyang bridge, the lower Sand Port bridge and the Stone Dragon bridge) are included in the calculation range. The upper boundary is a flow boundary adopted by the Wenfu bridge; the lower boundary is the downstream of the stone dragon bridge and adopts a water level boundary.
S4, verifying the one-dimensional hydrodynamic model through historical flood data and correcting parameters
The calculation accuracy of the one-dimensional model usually depends on the determination of parameters by experience, and the reliability of the model parameters can be greatly improved by rating historical flood. During the period of the Taili typhoon in 2005, the Shiyang town had a large flood, and flood trails along the main control section were obtained through flood investigation. Meanwhile, a flood process is calculated according to short-duration rainstorm actually measured in the same period, and the flood process is used as a model boundary condition to carry out parameter calibration on the main river reach of the Shiyang town. And gradually approaching the verified flood level result by adjusting the comprehensive roughness of the section and the head loss coefficient of the culvert generalized bridge, and finally obtaining the simulated water level and the flood-regulated water level difference value within 0.02 m. It is suitable to calculate the water blocking effect of the river surface line by adopting a culvert generalized bridge.
The upper bound condition in this embodiment is a flow condition. The lower boundary condition in this embodiment is a water level condition.
S5 intelligent analysis of bridge water damming
The one-dimensional hydrodynamic model is obtained through verification of step S4, the inflow conditions required by design are input into MIKE11, and MIKE11 simulates the water flow characteristics required by design through calculation.
In this embodiment, the influence of water damming of the stone-dragon bridge in 20 years in flood flow is analyzed, and the water level change situation of the upstream of the stone-dragon bridge after the grooving measure is adopted is also analyzed. A discharge chute 6 is dug under a stone dragon bridge, the width of the discharge chute 6 is 43m, the depth of the discharge chute is about 4m, and the height of the bottom of the discharge chute is 277m (see fig. 3). Under the working condition of slotting, the water passing section of the hollow arch bridge is changed, the section of the main bridge arch 1 of the hollow arch bridge established in the step S3 is adjusted according to the excavated slot, the rest bridge shoulder arches 2 are kept unchanged, the one-dimensional hydrodynamic model verified in the step S4 is substituted, the water position of the Shiyang xi actinolite dragon bridge can be reduced by 1.85m at most in 20 years, and the flood control standard meets the 20-year meeting requirement.
The overflow capacity of the main arch 1 and the bridge shoulder arch 2 of the hollow arch bridge in the flood process is accurately and scientifically calculated by adopting a one-dimensional hydrodynamic hollow arch bridge water-damming intelligent analysis method, and a decision basis is provided for providing economic and reasonable flood control measures.
This embodiment still provides a fasting arch bridge intelligent analysis device that stagnates water based on one-dimensional hydrodynamic model, includes: the simulation system comprises a simulation area determining module, a datamation module, a modeling module, a model verifying and correcting module and a model calculating module, wherein the simulation area determining module is used for determining a simulation area; the data module is used for converting the simulation area into data; the modeling module is used for obtaining a one-dimensional hydrodynamic model of the simulation area according to the digitalized simulation area, wherein the generalization of the fasting arch bridge adopts a mode of adding weirs to a plurality of culverts; the model verification and correction module is used for verifying and correcting parameters of a one-dimensional hydrodynamic model of a generalized hydraulic structure with the open-web arch bridge according to historical flood data; and the model calculation module is used for obtaining the corresponding flood level near each influence object through the verified and parameter-corrected one-dimensional hydrodynamic model according to different designed inflow conditions.
The present embodiment further provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for intelligently analyzing the water congestion of the fasting arch bridge based on the one-dimensional hydrodynamic model according to the present embodiment are implemented.
The present embodiment further provides a computer device having a processor and a memory, where the memory stores a computer program, and the computer program, when executed by the processor, implements the steps of the method for intelligently analyzing the water congestion of the arch bridge on the basis of the one-dimensional hydrodynamic model.
Claims (10)
1. An intelligent analysis method for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model is characterized by comprising the following steps:
s1, determining a simulation area;
s2, converting the simulation area into data;
s3, obtaining a one-dimensional hydrodynamic model of the simulation area according to the digitalized simulation area, wherein the generalization of the hollow arch bridge adopts a mode of adding weirs to a plurality of culverts;
s4, verifying and parameter correcting the one-dimensional hydrodynamic model of the generalized hydraulic structure with the open-web arch bridge through historical flood data;
and S5, according to different designed inflow conditions, obtaining corresponding flood levels near each affected object through the verified and parameter-corrected one-dimensional hydrodynamic model.
2. The method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model as claimed in claim 1, wherein step S1 comprises:
analyzing the position of the hollow arch bridge and the scale of the river channel, determining the influence range of the upstream and downstream water levels, and properly extending the influence range to a river reach with smooth water flow to form a simulation area.
3. The method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model as claimed in claim 1, wherein step S2 comprises:
acquiring the conditions of the terrain, the surface feature, the water body and the water conservancy condition in the simulation area, performing datamation on the terrain, the surface feature, the water body and the water conservancy condition in the simulation area, generating terrain scatter points containing the terrain and the hydraulic structure in the simulation area, and converting the scatter point terrain into a section file supported by MIKE 11.
4. The method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model as claimed in claim 3, wherein the step S3 comprises:
and (3) introducing the section file established in the step S2 into the MIKE11, generating a basic numerical model of the simulation area, establishing a river network file for the basic numerical model of the simulation area, and setting a hydraulic structure, a water level flow boundary, a bottom resistance parameter, an initial parameter and a solving format in the river network model to obtain a one-dimensional hydrodynamic model of the simulation area, wherein the generalization of the fasting arch bridge adopts a form of adding a weir to a plurality of culverts.
5. The method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model as claimed in claim 1, wherein step S4 comprises:
modifying the section condition in the one-dimensional hydrodynamic model established in the step S3 into the section condition under the historical flood condition;
inputting the inflow flow and the outflow water level recorded in the historical data into the modified one-dimensional hydrodynamic model to obtain a simulated flood level under the condition recorded in the historical data;
and comparing the simulated flood level with the actual flood level recorded by the historical data, if the simulated flood level is compared with the actual flood level recorded by the historical data, and if the simulated flood level does not meet the precision requirement, adjusting the comprehensive roughness of the section and the head loss coefficient of the culvert generalized bridge until the simulation result meets the precision requirement.
6. The method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model as claimed in claim 5, wherein the step S5 comprises:
modifying the fracture surface conditions in the one-dimensional hydrodynamic model verified and parameter-modified in the step S4 back to the fracture surface determined in the step S3;
different inflow conditions are designed and input into the MIKE11, and the MIKE11 obtains the flood level near the upstream and downstream interested objects of the fasting arch bridge under the one-dimensional hydrodynamic model after verification and parameter correction.
7. The method for intelligently analyzing the water choking of the fasting arch bridge based on the one-dimensional hydrodynamic model as claimed in claim 1, wherein: the one-dimensional hydrodynamic model equation of the one-dimensional unsteady flow numerical model is as follows:
in the formula: b is water surface width, Z is water level, Q is flow, Q is side inflow, v is section average flow velocity, g is gravity acceleration, A is water passing section area, and K is flow modulus of the water passing section.
8. An intelligent analysis device for water choking of an open-web arch bridge based on a one-dimensional hydrodynamic model is characterized in that: the method comprises the following steps:
the simulation area determining module is used for determining a simulation area;
the data module is used for converting the simulation area into data;
the modeling module is used for obtaining a one-dimensional hydrodynamic model of the simulation area according to the digitalized simulation area, wherein the generalization of the fasting arch bridge adopts a mode of adding a weir in a plurality of culverts;
the model verification and correction module is used for verifying and correcting parameters of a one-dimensional hydrodynamic model of a generalized hydraulic structure with the open-web arch bridge according to historical flood data;
and the model calculation module is used for obtaining the corresponding flood level near each influence object through the verified and parameter-corrected one-dimensional hydrodynamic model according to different designed inflow conditions.
9. A storage medium having a computer program stored thereon, characterized in that: the computer program is executed by a processor to realize the steps of the method for intelligently analyzing the water congestion of the fasting arch bridge based on the one-dimensional hydrodynamic model according to any one of claims 1 to 7.
10. A computer device having a processor and a memory, the memory having a computer program stored thereon, characterized in that: the computer program is executed by a processor to realize the steps of the method for intelligently analyzing the water congestion of the fasting arch bridge based on the one-dimensional hydrodynamic model according to any one of claims 1 to 7.
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| CN114997085A (en) * | 2022-08-02 | 2022-09-02 | 中国长江三峡集团有限公司 | One-dimensional hydrodynamic model construction method and device, electronic equipment and storage medium |
| CN116595898A (en) * | 2023-07-18 | 2023-08-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and system for quantitatively analyzing water blocking superposition influence of plain river bridge group |
| CN117150974A (en) * | 2023-10-31 | 2023-12-01 | 长江三峡集团实业发展(北京)有限公司 | Reservoir area water surface line prediction method, device, equipment and medium based on large flow |
| CN117152623A (en) * | 2023-11-01 | 2023-12-01 | 中铁水利信息科技有限公司 | Flood forecasting method, device and medium based on big data |
| CN117172560A (en) * | 2023-11-02 | 2023-12-05 | 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) | Mountain torrent disaster risk analysis method under bridge water blocking effect |
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| CN114997085B (en) * | 2022-08-02 | 2022-10-21 | 中国长江三峡集团有限公司 | One-dimensional hydrodynamic model construction method and device, electronic equipment and storage medium |
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| CN117172560A (en) * | 2023-11-02 | 2023-12-05 | 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) | Mountain torrent disaster risk analysis method under bridge water blocking effect |
| CN117172560B (en) * | 2023-11-02 | 2024-02-13 | 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) | Mountain torrent disaster risk analysis method under bridge water blocking effect |
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