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http://dx.doi.org/10.5389/KSAE.2008.50.3.115

Regional Scale Evapotranspiration Mapping using Landsat 7 ETM+ Land Surface Temperature and NDVI Space  

Na, Sang-Il ((주)선도소프트 U-전략사업단)
Park, Jong-Hwa (충북대학교 농업생명환경대학 지역건설공학과)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.50, no.3, 2008 , pp. 115-123 More about this Journal
Abstract
Evapotranspiration mapping using both meteorological ground-based measurements and satellite-derived information has been widely studied during the last few decades and various methods have been developed for this purpose. It is significant and necessary to estimate regional evapotranspiration (ET) distribution in the hydrology and water resource research. The study focused on analyzing the surface ET of Chungbuk region using Landsat 7 ETM imagery. For this process, we estimated the regional daily evapotranspiration on May 8, 2000. The estimation of surface evapotranspiration is based on the relationship between Temperature Vegetation Dryness Index (TVDI) and Morton's actual ET. TVDI is the relational expression between Normalized Difference of Vegetation Index (NDVI) and Land Surface Temperature (LST). The distribution of NDVI corresponds well with that of land-use/land cover in Chungbuk. The LST of several part of city in Chungbuk region is higher in comparison with the averaged LST. And TVDI corresponds too well with that of land cover/land use in Chungbuk region. The low evapotranspiration availability is distinguished over the large city like Cheongju-si, Chungju-si and the difference of evapotranspiration availability on forest and paddy is high.
Keywords
Landsat ETM+; Normalized difference vegetation index (NDVI); Land use/land cover; Land surface temperature (LST); Temperature vegetation dryness index (TVDI);
Citations & Related Records
연도 인용수 순위
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