A Spatialization Method of Watershed Storage Density Based on arcgis
A spatialized, watershed technology, applied in climate change adaptation, special data processing applications, instruments, etc., can solve problems such as the inability to correctly reflect the spatial distribution of flood control capacity in the watershed, and achieve the effect of good intervention capacity
Active Publication Date: 2017-07-18
HOHAI UNIV
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Problems solved by technology
Due to the existence of watersheds, the flood risk caused by floods in different tributaries has regional characteristics. This method of interpolation or gridding often causes the flood control storage capacity on the A river to be interpolated to the parallel river B or causes the river without flood control capacity to be interpolated. Flood control capacity cannot be accurately reflected in the spatial distribution of flood control capacity in the basin
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[0024] In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.
[0025] The present invention divides the watershed into several sub-basins according to different topography, landforms and main flood control sections in the upper and lower reaches, or divides the watershed into sub-basins according to the surface runoff water-dividing line, establishes the sub-basin area matrix and the reservoir capacity numerical matrix, and divides the watershed according to the sub-basin boundary, river direction and reservoir The position relationship matrix between reservoir and sub-basin, sub-basin and sub-basin is established, and the ...
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The invention discloses an ArcGIS (Arc Geographic Information System)-based basin reservoir capacity spatialization method. The method comprises the following steps: dividing a basin into sub-basins according to branch distribution and flood control sections on the upstream and downstream sides and the left and right banks of the basin, or dividing a research region into the sub-basins according to a surface runoff water divide line; establishing a sub-basin area numerical value matrix and a reservoir capacity numerical value matrix; establishing a position correlation matrix between the sub-basins; establishing position correlation matrix between a reservoir and the sub-basins; calculating the reservoir capacity density of each sub-basin according to a sub-basin reservoir capacity density calculation formula; obtaining the basin reservoir capacity density spatial distribution through an ArcGIS software. The difference in landform of the upstream and downstream sides and the left and right banks of the basin is fully considered, the sub-basins are divided according to the main flood control section or the surface runoff water divide line, and the defect that a reservoir capacity density value is interpolated by parallel rivers or rivers without flood control capacity by the conventional spatial interpolation method or basin gridding method is made up.
Description
technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to flood disaster risk assessment and comprehensive zoning technology. Background technique [0002] Flood disasters are natural disasters with high frequency, wide range of damage, and the most serious impact on the national economy in my country. They are also one of the top ten natural disasters that threaten human survival. The risk assessment and risk zoning of flood disasters in river basins are crucial to the formulation of disaster prevention and mitigation measures for river basins. countermeasures are important. Flood control and disaster mitigation capabilities of engineering measures such as reservoirs are important factors in the risk assessment of flood disaster risk in a watershed or the stability factors of disaster-forming environment. How to scientifically and rationally distribute the flood control and disaster reduction capabilities of the...
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IPC IPC(8): G06F17/50
CPCY02A10/40
Inventor 钟平安吴业楠马彪闫堃朱非林张宇
Owner HOHAI UNIV