Disaster early warning method and system based on hydrological connectivity structure index

A technology of structural index and hydrological connectivity, applied in the field of watershed management, can solve problems such as effective disaster early warning of difficult hydrological connectivity structures

Inactive Publication Date: 2020-09-15
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0005] In order to overcome the lack of methods for quantifying the hydrological connectivity structure in the prior art, which makes it difficult to carry out effective disaster early warning based on the hydrological connectivity structure of the watershed, the present invention provides a disaster early warning method and system based on the hydrological connectivity structure index

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  • Disaster early warning method and system based on hydrological connectivity structure index
  • Disaster early warning method and system based on hydrological connectivity structure index
  • Disaster early warning method and system based on hydrological connectivity structure index

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Embodiment Construction

[0042] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0043] It should be noted that among the various hydrological elements related to runoff generation, the temporal and spatial distribution of soil water content is a crucial decisive factor, which largely affects key factors such as infiltration capacity and flow rate. Therefore, the present invention quantifies the hydrological connected structure based on the temporal and spatial distribution of soil water content, obtains the hydrological connected structure index, and performs disaster warning based on the hydrological connected structure index.

[0044] figure 1 It is a schematic diagram of the overall process of a disaster early warning method based on a hydrological connected structure index according to an...

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Abstract

The invention provides a disaster warning method and system based on a hydrological connected structure index. The method comprises: dividing a target region into a plurality of grid regions, and obtaining a relative volumetric moisture content corresponding to each grid region by measuring the volumetric moisture content of the surface soil of each grid region and the non-capillary porosity; obtaining at least one connected region according to the relative volumetric moisture content corresponding to each grid region, and calculating a ratio of a total area of all connected regions to a totalarea of the target region as a first target index; adding the distance between each two grid regions in the connected region for any connected region, and obtaining the total distance corresponding to the connected region, and adding the total distance corresponding to all connected regions to obtain a second target index; performing disaster warning for the target area according to the first target index and the second target index. The method and system can quantify the hydrological connectivity structure, thereby accurately warning the disaster based on the hydrological connectivity structure index.

Description

Technical field [0001] The present invention relates to the technical field of watershed management, and more specifically, to a disaster early warning method and system based on a hydrological connectivity structure index. Background technique [0002] Hydrological connectivity is a new concept and new method in hydrological research, which is a description of water or material flow and energy cycle processes using water as a medium. Hydrological connected structure refers to the connection structure of multiple spatial units related to water or water-based material transport and energy flow processes. It explains the response of runoff to rainfall, as well as the soil erosion and nutrition caused by runoff. The loss of elements and the transport of pollutants are of great significance to the hydrological process. [0003] However, in practical applications, the hydrological connectivity structure has not been included in the monitoring system because of the lack of a mature and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/10
CPCG08B21/10
Inventor 张明祥刘佳凯张振明马梓文张英虎代立熠
Owner BEIJING FORESTRY UNIVERSITY
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