Landsat ETM+영상의 지표면온도와 NDVI공간을 이용한 광역 증발산량의 도면화 (Regional Scale Evapotranspiration Mapping using Landsat 7 ETM+Land Surface Temperature and NDVI Space)

서지정보

· 발행기관 : 한국농공학회
· 수록지 정보 : 한국농공학회논문집 / 50권 / 3호 / 155 ~ 164페이지
· 저자명 : 나상일, 박종화

초록

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 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 is higher in comparison
with the averaged LST. And TVDI corresponds too well with that of land cover/land use in Chungbuk. 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 evapotranspiration.

영어초록

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 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 is higher in comparison
with the averaged LST. And TVDI corresponds too well with that of land cover/land use in Chungbuk. 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 evapotranspiration.

참고자료

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