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Mapping of Areal Evapotranspiration by Remote Sensing and GIS Techniques

RS/GIS수법을 이용한 廣域蒸發散量의 추정

  • 安忠鉉 (天葉大學校 工學部情報工學科) ;
  • ;
  • ;
  • 오성남 (韓國科學技術硏究員 시스템工學硏究所 地球環境情報硏究部) ;
  • 박종현 (韓國科學技術硏究員 시스템工學硏究所 地球環境情報硏究部)
  • Published : 1995.06.01

Abstract

Remote Sensing data with ancillary ground-based meteorological data provides the capalility of computing threeof the four surface energy balance components(i.e. net radiation, soil heat flux and sensible heat flux) at different spatial and temporal scales. As a result, this enablis the estimation of the remaining term, latent heat flux. One of the practical applications with this approach is to produce evapotranspiration maps over large areas. This results could estimate and reproduce areal evapotranspiration over large area as much as several hundred sequare kilometers. Moreover, some calculating simulations for the effects of the land use change on the surface heat flux has been made by this method, which is able to estimate evapotranspiration under arbitracy presumed condition. From the simulation of land use change, the results suggests that the land use change in study area can be produce the significant changes in surface heat flux. This preliminary research suggests that the future research should involve development of methods to account for the variability of meteorological parameters brought about by changes in surface conditions and improvements in the modeling of sensible heat transfer across the surface atmosphere interface for partical canopy conditions using remote sensing information.

기상관측자료와 더불어 원격탐사자료를 이용함으로서 서로 다른 공간 및 시간스케일에 대한 에너지수직의 3성분을 추정할 수 있으며 결과적으로는 잠열의 추정을 가능하게 하였다. 이 러한 접근법을 응용하여 본 연구에서는 기상 및 위성자료를 바탕으로 지표에너지 관계식을 이용 한 광역증발산량 추정하는 방법에 대하여 검토하였다. 또한 토지이용의 변화에 따른 지표면열수 지의 변화를 평가하기 위하여 지리정보시스템분석 방법을 사용하여 검토하였다. 그 결과 연구지 역의 토지이용변화는 지역내의 열수지에 상당한 변화를 가져오는 것으로 나타났다. 본 연구의 결 과를 향상시키기 위해서는 열수지의 계산에 사용되는 각 추정식의 정확도 향상과 지표면의 상태 를 위성 원격탐사로서 정확하게 파악할 필요가 있다.

Keywords

References

  1. International Journal of Remote Sensing v.8 Deriving surface albedo measurements from narrow band satellite data Brest,C.L.;Goward,S.N.
  2. Water Resource Research v.11 On a derivable formula for long-wave radiation from clear skies Brutsaert,W.
  3. Evaporation into the atmosphere:Theory, History, and Applications Brutsaert,W.
  4. Remote Sensing of Environment v.32 Spectral estimates of net radiation and soil heat flux Daughtry,C.S.T.;Kustas,W.P.;Moran,M.S.;Pinter,P.J.Jr.;Jackson,R.D.;Brown,P.W.;Nichols,W.D.;Gay,L.W.
  5. Journal of Geophysical Research v.74 Thermal radiation from the atmosphere Idso,S.B.;Jackson,R.D.
  6. Environmental Research Center Paper v.8 Estimation of river basin evapotranspiration Kotoda,K.
  7. Agriculture, Forest and Meteorology v.49 Estimation of the soil heat flux/net radiation ratio from spectral data Kustas,W.P.;Daughtry,C.S.T.
  8. Remote Sensing of Environment v.46 Analytical treatment of the relationship between soil heat flux/net radiation ratio and vegetation indices Kustas,W.P.;Daughtry,C.S.T.;Van Oevelen,P.J.
  9. Remote Sensing of Environment v.32 Aerodynamic parameters for a sparsely roughened surface composed of small cotton plants and ridged soil Matthias,A.D.;Kustas,W.P.;Gay,L.W.;Cooper,D.I.;Alves,L.M.;Pinter,Jr.P.J.
  10. Flow and Transport in the Natural Environment : Advances and Applications Surface temperature and the surface energy balance-commentary McNaughton,K.G.;W.L.Stefan(ed.);O.T.Denmead(ed.)
  11. Remote Sensing of Environment v.30 Mapping surface energy balance components by combining Landsat Thematic Mapper and groundbased meteorological data Moran,M.S.;Jackson,R.D.;Raymond,L.H.;Gay,L.W.;Slater,P.N.
  12. Water Resource Research v.15 An improved equation for estimating long-wave radiation from the atmosphere Satterlund,D.R.
  13. Photogrammetric Engineering and Remote Sensing v.55 no.9 Image Processing of Thermal Infrared Images Schott,J.R.