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A dem-based coding method for grid calculus order of grid hydrological model

A hydrological model and coding method technology, applied in 3D modeling, computing, instruments, etc., can solve problems that only occur between adjacent layers, cannot distinguish between channel grids and non-channel grids, and cannot be searched

Active Publication Date: 2019-11-05
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0007] The present invention designs a DEM-based grid-type hydrological model grid calculus sequence encoding method, which solves the problem that the channel grid and the non-channel grid cannot be distinguished during the encoding process, and the hydraulic connection between the grids is only Occurs between adjacent layers, and the calculation process cannot find problems in the calculation process according to the topological relationship through the coding rules

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  • A dem-based coding method for grid calculus order of grid hydrological model
  • A dem-based coding method for grid calculus order of grid hydrological model

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Embodiment Construction

[0026] Combine below figure 1 and figure 2 , the present invention is further described:

[0027] Such as figure 1 As shown, this embodiment is a DEM-based grid-type hydrological model grid calculus sequence coding method, the process is as follows figure 1 shown. The steps of the method described in this embodiment are as follows:

[0028] Step 1: Determine the grid size of the established grid-type hydrological model according to the scope of the research area and research needs, such as 1km×1km, 3km×3km or 9km×9km, and the size of each grid should be consistent during a modeling process .

[0029] Step 2: With the help of the hydrological analysis tools in Arcgis 10.2, the water flow direction of each grid is obtained by the uniflow method.

[0030] Step 3: According to the flow direction information of each grid obtained in step 2, with the help of the hydrological analysis tool in Arcgis 10.2, set the catchment area threshold, and obtain the digital information of ...

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Abstract

The invention relates to a DEM-based grid-type hydrological model grid calculus sequence coding method, including: determining the grid size, obtaining the grid water flow direction, dividing the river channel grid and sub-basin, sub-basin coding, confluence layer coding, layer Internal sequence coding, inflow grid coding and channel coding. Through the coding method of the present invention, the calculation of flow yield and confluence of the grid-type hydrological model can be realized. The coding rules assign different identification values ​​to each sub-basin of the watershed, which is convenient for parallel calculation. During the coding process, the river grid and the non-river network are distinguished Grids, and the hydraulic connection between grids only occurs between adjacent layers, it is convenient to find problems in the calculation process through coding rules according to the topological relationship in the calculation process.

Description

technical field [0001] The invention relates to a construction method of a hydrological model, in particular to a DEM-based grid-type hydrological model grid calculation sequence coding method. Background technique [0002] Hydrological phenomena in nature are complex, not only including different interrelated but independent processes, but also affected by many external conditions. In order to realize the simulation and research of complex hydrological processes in the real world, the concept of hydrological model came into being under the continuous exploration of pioneers in hydrology. It can be said that the emergence of hydrological models has opened a new door in the field of hydrology research, and has become the basis for studying and exploring all processes related to hydrology or analyzing all hydrological phenomena. [0003] In general, hydrological models can be divided into two categories: distributed models and lumped models. The lumped hydrological model reg...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05
CPCG06T17/05G06T17/205
Inventor 刘佳李传哲王洋田济扬邱庆泰郝斯佳于新哲王维刘昱辰
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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