Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)

  • 2008.10a
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  • Pages.204-207
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  • 2008
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  • 1226-9743(pISSN)
Korean Society of Remote Sensing (대한원격탐사학회)
권호 표지

THE CORRELATION ANALYSIS BETWEEN SWAT PREDICTED SOIL MOISTURE AND MODIS NDVI

  • Hong, Woo-Yong (Dept. of Civil & Environmental System Engineering, Konkuk University) ;
  • Park, Min-Ji (Dept. of Rural Engineering, Konkuk University) ;
  • Park, Jong-Yoon (Dept. of Civil & Environmental System Engineering, Konkuk University) ;
  • Kim, Seong-Joon (Dept. of Civil & Environmental System Engineering, Konkuk University)
  • Published : 2008.10.29
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Abstract

The purpose of this study is to identify how much the MODIS NDVI (Normalized Difference Vegetation Index) can explain the soil moisture simulated from SWAT (Soil and Water Assessment Tool) continuous hydrological model. For the application, ChungjuDam watershed (6,661.3 $km^2$) was adopted which covers land uses of 82.2 % forest, 10.3 % paddy field, and 1.8 % upland crop respectively. For the preparation of spatial soil moisture distribution, the SWAT model was calibrated and verified at two locations (watershed outlet and Yeongwol water level gauging station) of the watershed using daily streamflow data of 7 years (2000-2006). The average Nash and Sutcliffe model efficiencies for the verification at two locations were 0.83 and 0.91 respectively. The 16 days spatial correlation between MODIS NDVI and SWAT soil moisture were evaluated especially during the NDVI increasing periods for forest areas.

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