Title :
Simulating the temporal and spatial heterogeneity of evapotranspiration among the different watersheds
Author :
Li, Chongwei ; Zhao, Yongli ; Wang, Yuming ; Sun, Pengsun
Author_Institution :
Tianjin Normal Univ., Tianjin, China
Abstract :
A modified Priestley-Taylor model is established to simulate the temporal and spatial variation of regional Evapotranspiration. In which, the solar radiation was improved by accounting for the variations in slope and azimuth of land surface and terrain. Result is shown that modified Presity-Taylor could well express the spatial heterogeneity of the potential evapotranspiration using remotely sensed vegetation index and temperature. The evapotranspiration of the upstream Minjiang River (UTM) was 406.88mm in 2005, while Shouxi watershed and Zagunao upside watershed were 471mm and 374mm, respectively. In addition, mixed forest and conifer forest have a higher evapotranspiration than that from other vegetation types all the year.
Keywords :
atmospheric radiation; atmospheric temperature; hydrological techniques; rivers; vegetation; AD 2005; China; Shouxi watershed; Zagunao upside watershed; computer simulation; conifer forest; land surface; mixed forest; modified Priestley-Taylor model; regional evapotranspiration; solar radiation; spatial heterogeneity; spatial variation; temporal heterogeneity; temporal variation; upstream Minjiang River; vegetation index; Aerodynamics; Biological system modeling; Computer simulation; Land surface; Land surface temperature; Large-scale systems; Remote sensing; Rivers; Temperature sensors; Vegetation mapping; Computer simulation; Evapotranspiration; Presity-Taylor; Regional scale;
Conference_Titel :
Computer Design and Applications (ICCDA), 2010 International Conference on
Conference_Location :
Qinhuangdao
Print_ISBN :
978-1-4244-7164-5
Electronic_ISBN :
978-1-4244-7164-5
DOI :
10.1109/ICCDA.2010.5540737
