Evapotranspiration of Hailiutu River Basin in Erdos Plateau Using Remote Sensing Data
نویسندگان
چکیده
Evapotranspiration (ET) plays an important role in the hydrological cycle and it is essential to estimate ET accurately for the evaluation of available water resources in arid regions. In this paper, the monthly change of ET in the semi-arid Hailiutu River basin in northwest China were studied. The spatial distribution of ET was assessed by using the energy balance approach SEBS (Surface Energy Balance System). Cloud free MODIS images over the Hailiutu River basin in 2008 were used in combination with SEBS to estimate ET at a spatial resolution of 1 km. This daily ET was converted to a monthly ET using daily pan evaporation values from a meteorological station in the study area. Spatial aggregation of all pixels yielded the total monthly ET for the whole study area. Subsequently, the monthly ET was summed up to annual ET values using the pan evaporation data.
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