River network regional water system connectivity measurement method based on geographic information system technology

Abstract

The invention discloses a river network regional water system communication measuring method based on geographical information system technology, the method comprises: acquiring the initial deciphering data for researching the area river network water system; establishing a space topological structure of river network water system initial deciphering data; acquiring initial data of river chain and node of the river network water system; recognizing and deleting repeat nodded in the river network water system; calculating the communication indexes of the river network regional water system. The invention introduces the GIS technology into the measurement of the communication of the river network regional water system, can reduce the mistakes caused by the objective method; meanwhile, can avoid the not accurate problem when acquiring the river and node data of the river network water system by the existing GIS technology tool utilizing the VB programming technology of AroGIS and the topological rebuilding technology, can scientifically measure the communication of the high-density river network area water system landscape, and can provide quantitative reference for the regional landscape ecological planning.

Description

technical field [0001] The invention relates to the field of landscape ecological planning, and specifically refers to measuring the landscape connectivity of water systems in plain river network areas by using geographic information system technology (GIS) and remote sensing technology (RS). Background technique [0002] River corridors are one of the important ecological corridors. In the practice of regional landscape ecological planning, the measurement and analysis indicators of the spatial structure characteristics of river corridors generally include corridor length and width, corridor curvature, corridor connectivity, corridor Among them, the connectivity of river corridors is one of the core indicators, which has important characterization significance for ecosystem service functions such as river hydrological regulation and biodiversity protection. River network connectivity generally refers to the degree of connection between the river chain and all nodes in the r...

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Problems solved by technology

However, on the one hand, the river system in the plain river network area is highly developed, with criss-crossing river channels, and the river network nodes and river chains are relatively complex, with the number of both reaching hundreds or more; on the other hand, affected by urbanization, the water system in the study area is often They are separated from each other, and there may be multiple network subgraphs that are not hydraulically connected to each other, which makes it difficult to accurately judge the N value, L value, and p value in the river network and the measurement of the connectivity of the river network and water system by subjective visual methods. method also faces confusion

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