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Evapotranspiration estimation using a normalized difference vegetation index transformation of two satellites data in arid mountain areas

Almhab, Ayoub and Busu, Ibrahim Evapotranspiration estimation using a normalized difference vegetation index transformation of two satellites data in arid mountain areas. In: 7th International Symposium 7 Exhibition on Geoinformation (ISG 2008), 13-15 October 2008, Putra World Trade Centre(PWTC), Kuala Lumpur, Malaysia.

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Abstract

Evapotranspiration (ET) was estimated using a normalized difference vegetation index (NDVI) of satellite data on central Yemen Mountains. A procedure was developed which equated the index to crop coefficients. Evapotranspiration estimates for fields for three dates of Landsat Thematic Mapper data were highly correlated with ground estimates. Service area estimates using landsat Thematic Mapper (TM) and NOAA Advanced Very High Resolution Radiometer (AVHRR) data agreed well with estimates based on National Water Resources Authority (NWRA) gauging station data. Comparisons of ET results with traditional ET models show good agreement. Sensitivity analyses show that the model is accurate even without atmospheric correction.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Evapotranspiration, NWRA, Yemen, NDVI, TM, AVHRR
Subjects:T Technology > T Technology (General)
Divisions:Geoinformation Science And Engineering (Formerly known)
ID Code:7748
Deposited By: En. Tajul Ariffin Musa
Deposited On:17 Jan 2009 05:06
Last Modified:19 May 2011 02:36

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