Journal of Resources and Ecology ›› 2012, Vol. 3 ›› Issue (1): 50-54.DOI: 10.5814/j.issn.1674-764x.2012.01.008

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Water Yield of Xitiaoxi River Basin Based on InVEST Modeling

ZHANG Canqiang1,2, LI Wenhua1, ZHANG Biao1, LIU Moucheng1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-11-28 Revised:2012-01-20 Online:2012-03-30 Published:2012-03-30
  • Supported by:

    National Major Water Pollution Control Project(No.2008ZX07526-007).

Abstract: Water yield calculation and mapping are of great importance to water resource planning and management and hydropower station construction. A water yield model based on InVEST was employed to estimate water runoff in the Xitiaoxi River basin. The data included land use and land cover, average annual precipitation and potential evapotranspiration, soil depth, and plant available water content. In order to test model accuracy the natural runoff of Xitiaoxi River was estimated based on linear regression relation of rainfall-runoff in a ‘reference period’. After repeated validation, when the Z value was 6.5 the water yield was 8.30 E+8 m3 and this was a smaller difference with natural runoff. From the distribution of water yield, south and southwestern areas of the watershed had higher water yield volumes per hectare.

Key words: water yield, InVEST, land use and land cover, plant available water content, Xitiaoxi River