Terrain Correction for Increasing the Evapotranspiration Estimation Accuracy in a Mountainous Watershed

NCUIR > College of Earth Sciences > Graduate Institute of Space Science > journal & Dissertation > Item 987654321/50413

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50413

Title:	Terrain Correction for Increasing the Evapotranspiration Estimation Accuracy in a Mountainous Watershed
Authors:	Wang,YC;Chang,TY;Liou,YA
Contributors:	太空科學研究所
Keywords:	REMOTE-SENSING DATA;SURFACE;RESISTANCE;VEGETATION;FOREST;LAYER;FLUX
Date:	2010
Issue Date:	2012-03-27 17:31:10 (UTC+8)
Publisher:	國立中央大學
Abstract:	Evapotranspiration (ET) plays a major role in the energy and water balances of the hydrological cycle. Monitoring ET at a regional level has become feasible with the advance of remote-sensing technology. This letter presents a module that incorporates satellite images, surface meteorological data, and topographic information in estimating ET over a tropical montane watershed. The satellite images used include Thematic Mapper (TM), Landsat-7 Enhanced Thematic Mapper Plus, and Advanced Spaceborne Thermal Emission and Reflection Radiometer with visible, near infrared, shortwave infrared, and thermal infrared bands. The estimated surface energy fluxes are compared with the in situ measurements. The results demonstrate that, compared to other model estimations, the proposed module with terrain correction provides the highest correlation (r = 0.75) between the estimated latent heat flux associated with ET and its corresponding in situ measurement. The proposed module will be further refined and applied to monitor long-term ET over mountainous watersheds.
Relation:	IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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