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Volume 40 Issue 2
Apr.  2021
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XU Rui, LI Jian, WEN Jianhui. Analysis of regional catchment index based on GIS: An example of the Chaotian river basin[J]. CARSOLOGICA SINICA, 2021, 40(2): 319-324. doi: 10.11932/karst202102y19
Citation: XU Rui, LI Jian, WEN Jianhui. Analysis of regional catchment index based on GIS: An example of the Chaotian river basin[J]. CARSOLOGICA SINICA, 2021, 40(2): 319-324. doi: 10.11932/karst202102y19

Analysis of regional catchment index based on GIS: An example of the Chaotian river basin

doi: 10.11932/karst202102y19
  • Publish Date: 2021-04-25
  • In order to evaluate the catchment situation more effectively,a comprehensive catchment index evaluation model based on grid was constructed by remote sensing(RS) and geographic information system(GIS)for the Chaotian River basis. It took topographic index,surface index and vegetation index as main parameters. The results show that the average value of regional catchment comprehensive index is 2.91,and the magnitude order of catchment weights is topography(0.42352)> vegetation(0.29691)> surface(0.21955). The topographic state index has the greatest influence on catchment,while the surface state index and vegetation state index have relatively little influence. The areas with intense karst development and deviation of water system density are distributed in the areas with catchment comprehensive grade lower than III.

     

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