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[1]YU Hong-bo,BAO Yu-hai,ZHANG Qiao-feng,et al.Remote Sensing Monitoring of Temporal and Spatial Variation of Evapotranspiration in Xilin River Basin[J].Research of Soil and Water Conservation,2014,21(06):290-294.

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Remote Sensing Monitoring of Temporal and Spatial Variation of Evapotranspiration in Xilin River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 06 Page number: 290-294 Column: Public date: 2014-12-28

Title:: Remote Sensing Monitoring of Temporal and Spatial Variation of Evapotranspiration in Xilin River Basin

Author(s):: YU Hong-bo^1,2, BAO Yu-hai¹, ZHANG Qiao-feng^1,2, LI He-ping³, WANG Jun³; 1. Inner Mongolian Key Laboratory of Remote Sensing and Geography Information System, Inner Mongolia Normal University, Huhhot 010022, China;
2. College of Geograghical Science, Inner Mongolia Normal University, Huhhot 010022, China;
3. Institute of Water Resources for Pastoral Area, IWHR, Hohhot 010020, China

Keywords:: Xilin River basin; evapotranspiration; remote sensing

CLC:: P332.2

DOI:: -

Abstract:: The study area is located in the Xilin River basin. Remote sensing approach was used to retrieve instantaneous evapotranspiration based on the estimation of land surface fluxes by using MODIS images from July 2000 to July 2012 and from Apr. to Sept. 2012, and using auxiliary environmental data from the same periods. Daily evapotranspiration was estimated by scaling. Monthly and ten-day evapotranspiration were weighted by the number of days. Results were verified by using the FAO method. This level of uncertainty was acceptable; therefore, the method that we concluded was applicable. The result of evapotranspiration distribution was consistent with land surface conditions. The evapotranspiration of wetland vegetation and meadow grassland was higher. The evapotranspiration of dense vegetation such as farmland was higher than the sparse. With respect to the spatial distribution, the evapotranspiration in the upper reaches was always higher than in the middle and lower reaches. It was consistent with the vegetation cover. The maximum evapotranspiration of thirteen years from 2000 to 2012 appeared in 2012. The minimum value appeared in 2000. The trend of evapotranspiration was consistent with precipitation. And the determinant was 0.755 3. Changes of monthly and ten-day evapotranspiration over time showed a bell-shaped curve, which reflected water consumption of plants throughout the growing season.

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