Remote sensing model of component evapotranspiration in wetland using MODIS data

doi:10.7523/j.issn.2095-6134.2009.3.011

Abstract

Abstract:

The study area "Poyang Lake area" is referred to humid environment and complex land coverage. In this paper, a component evapotranspiration model for wetland is developed based on component net radiance flux, component soil heat flux and component temperature through simplifying the complex processes of land-atmosphere interaction and analyzing vital factors which influence regional evapotranspiration. In the experiment the MODIS component proportion images with the 1km pixel are created according to TM classified images. Considering the difference of effect caused by different components on net radiance flux, the component net radiance flux is calculated using component proportion, component temperature and component albedo. The daily evapotranspiration distribution in Poyang Lake wetland is finally obtained. The new model is validated using residual method, field surveying data and history meteorological data. The result shows that the evapotranspiration acquired by the new model in Poyang Lake wetland is credible, and it can reflect the distribution of evapotranspiration in wetland objectively.

Key words: component evapotranspiration, Poyang Lake wetland, MODIS data, remote sensing model

CLC Number:

LIANG Wen-Guang, ZHAO Ying-Shi, ZHOU Xia, LIU Qian. Remote sensing model of component evapotranspiration in wetland using MODIS data[J]. , 2009, 26(3): 364-372.

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