Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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GRID-based Daily Evapotranspiration Prediction Model (GRIDET)

격자기반의 일 증발산량 추정모형 개발

  • Chae, Hyo-Seok (Water Resources Research Center, Korea Water Resources Corporation) ;
  • Kim, Seong-Jun (Dept.of Agricultural Engineering, Kunkuk University) ;
  • Jeong, Gwan-Su (Engineering Collage, Chungnam National University)
  • Published : 1999.12.01
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Abstract

A Grid-based daily evapotranspiration(ET) prediction model which calculates temporal and spatial ET with a complementary relationship of Morton(1983) was developed. The model was programmed by C-language and uses ASCII formatted map data of DEM(Digital Elevation Model) and land use. Daily ET within the watershed is calculated and the results of temporal variations and spatial distributions of ET are presented by using GRASS(Geographic Resources Analysis Support System). To verify the applicability of the model, it was applied to the part of Bocheong stream basin (76.5$\textrm{km}^2$) located in the upstream of Dacheong Dam watershed. The result shows that the estimated evapotranspiration in 1995 was 766.1mm and 22% increased after correction radiation for slope and area.

본 논문에서는 Morton(1983)의 보완관계식을 이용하여 증발산량의 시.공간적 분포 양상을 계산할 수 있는 격자기반의 일 증발산량 추정 모형을 개발하였다. 본 모형은 C 언어로 개발되었으며, ASCII 형태의 수치표고자료와 토지피복도가 입력자료로 이용되어 유역에 대한 일 증발산량을 계산하게 된다. 또한, 증발산량에 대한 시간적 변화 양상과 공간적 분포 양상을 GRASS에서 나타낼 수 있도록 구성하였다. 모형의 적용성 검증을 위해서 대청댐 상류지역에 위치한 보청천의 일부 지역(76.5$\textrm{km}^2$)에 대해서 적용하였다. 적용결과, 보청천 유역의 이평교 지점에서 1995년도 증발산랑은 766.1mm로 나타났으며, 경사면과 면적에 대한 일사량 보정 후 약22%가 증가 하는 것으로 나타났다.

Keywords

References

  1. 植生?測による水文量の分布特性の平價および水?支に關する硏究 신사철
  2. 한국기후표 v.1 중앙기상대
  3. Quart. J. Roy. Meteorol. Soc. v.50 Solar and terrestrial radiation Angstrom, A.
  4. Water Resour. Res. v.17 no.4 Estimating evaportranspiration from the Sonoita Creek watershed near Patagonia, Arizona Ben-Asher. J.
  5. Water Resources Res. v.15 An advection-aridity approach to estimate actual regional evapotranspiration Brusaert, W.;Stricker, H.
  6. Guidelines for predicting crop water requirement(2nd Edition) Doorenbos, J.;Pruitt, W. O.
  7. TEHM Terrestrial ecosystem hydrology model Huff, D. D.;Luxmoore, R. J.;Mankin, J. B.;Begovich, C. L.
  8. J. of Hydrology v.38 Estimating evapotranspiration from potential evaporation-Practically of an iconoclasic approach Morton, F. I.
  9. J. of Hydrology v.66 Operational estimates of areal evapotranspiration and their significance to the science and practice of hydrology Morton, B. L.
  10. Mon. Weather Rev. v.100 On the assessment of surface heat flux and evaporation using large scale parameters Priestly, C. H. B.;Taylor, R. J.
  11. J. Atmos. Sci. v.46 Effects of implementing the simple biosphere model(Sib) in a general circulation model Sato, N.;Sellers, P. J.;Randall, E. K.;Schneider, J.;Shuka, J.;Kinter Ⅲ. J. L.;Jou, Y. T.;Albertazzi, E.
  12. J. Atmos. Sco. v.45 Cloud feedback processes in a general circluation model Wetherland, R. T.;Manabe, S.