Urban rainstorm waterlogging catchment area analysis method

A technology of urban rainstorm and analysis method, which is applied in the field of analysis of urban rainstorm and waterlogging catchment areas, and can solve problems such as inability to divide

Active Publication Date: 2019-06-11
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

In addition, neither of the two methods can divide the catchment areas of different sizes according to different rainfall intensities, which is different from the actual situation.

Method used

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  • Urban rainstorm waterlogging catchment area analysis method
  • Urban rainstorm waterlogging catchment area analysis method
  • Urban rainstorm waterlogging catchment area analysis method

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Embodiment Construction

[0050] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0051] refer to figure 1 , figure 1 shows the flow chart of the analysis method of urban rainstorm waterlogging catchment area; as figure 1 As shown, the method 100 includes steps 101 to 106.

[0052] In step 101, any selected area is randomly selected, and the SMS surface water simulation system is used to perform grid division on the selected area to obtain a calculation area.

[0053] In step 102, the DEM data of the ...

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Abstract

The invention discloses an urban rainstorm waterlogging catchment area analysis method. The method comprises the steps of adopting an SMS surface water simulation system to conduct gridgeneration on any selected area to obtain a calculation area; obtaining DEM data of a to-be-studied area, assigning the roughness and the DEM data to a calculation area, and calculating the elevation of each grid; adding rainfall data into the calculation area, and calculating rainfall yield confluence of each grid by adopting a pre-loss and post-loss method; according to the rainfall yield confluence of each grid, calculating the water depth and the water flow speed of each grid by adopting a surface two-dimensional hydraulic model; calculating the side flow of the grid with the water depth data according to the water flow speed of the grid with the water depth data and the side length of the side of the grid through which the water flow speed passes; and selecting a grid with the water depth greater than a set threshold value as an analysis grid, and judging whether the analysis grid is a catchment area or not according to the water depth of the analysis grid, the water depth of the grid adjacent to the analysis grid and the side flow rate and direction of each grid edge.

Description

technical field [0001] The invention relates to the field of flood control and anti-waterlogging technologies, in particular to an analysis method for urban storm waterlogging catchment areas. Background technique [0002] There are currently only two analysis methods that can be used as reference for the catchment area of ​​urban rainstorm and waterlogging: [0003] 1. According to the urban elevation terrain, take the low-lying part (generally the point prone to water accumulation) as the center, and use the elevation watershed as the catchment boundary of the sunken area; 2. According to the urban pipe network system, pipe The network is divided into a catchment area. [0004] Method 1 uses the digital elevation model (DEM) to extract hydrological element information based on the maximum slope single-flow algorithm (D8 algorithm), and completes the division of catchment boundaries. This method is more intuitive, but the urban terrain is generally flat, and the elevation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02A10/40
Inventor 刘舒臧文斌崔洁胡昌伟郑敬伟赵宏辉张红萍徐美李敏刘业森
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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