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

Volume

1

fYear

2010

fDate

25-27 June 2010

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICCDA.2010.5540737

Filename

5540737