농업비점원오염모형을 위한 GIS 호환모형의 개발 빛 적용(II) -AGNPS모형의 수정-

Development and Application of a GIS Interface for the Agricultural Nonpoint Source Pollution (AGNPS) Model(II) -Modification of AGNPS Model-

  • 김진택 (농지개량조합연합회 시험연구소) ;
  • 박승우 (서울대학교 농업생명과학대학)
  • 발행 : 1997.04.01

초록

The interface system, GIS-AGNPS was to be validated with field data from six tested small watersheds ranging from 0.7 to 4.7$km^2$ in size which have steep topography and complex landuses. The model validation involved the calibration of input parameters and component modifications, in efforts to develop a model applicable to general uses for identifying and controlling nonpoint source pollution loads from agricultural watersheds. The simulated direct runoff from AGNPS was in good agreement with the field data for the averaged antecedent moisture conditions or AMC- II. The results differed, however, from the observed for AMC- I or III. A simple empirical relationship was proposed to estimate the curve number for AMC- I or m from AMC- II, which was found to result in simulated runoff close to the observed. The peak runoff relationship at AGNPS was also modified to reflect the watershed conditions and tested satisfactorily with the field data. The simulated sediment yields from the watersheds were fair as compared to the observed. Nutrient loads simulated from the model were different from the observed data. It appeared that the model was incapable of adequate depicting nutrient transport processes at paddy field and other landuses of the tested watersheds. Some modifications may be needed for the accurate representing the processes at paddy field.

키워드

참고문헌

  1. 한국농공학회지 v.30 no.1 수문모형 ANSWERS의 반월유역에의 적용 김병진;박승우
  2. 서울대학교 석사학위논문 SCS법에의한 소유역의 홍수유출 추정 김종덕
  3. 서울대학교 박사학위 논문 농업 비점원 오염모형을 위한 지리자원정보시스템 호환모형의 개발 및 적용 김진택
  4. 농어촌 용수 환경관리에 관한 연구(Ⅰ)~ (Ⅱ) 농림수산부;농어촌진흥공사
  5. Cons. Res. Rep. no.26 CREAMS; A Field-scale Model for Chemical, Runoff and Erosion from Agricultrural Management System, USDA Foster,G.R.;L.J.Lane;J.D.Nowlin;J.M.Laflen;.R.A.Young
  6. Presented at the 1995 ASAE Annual Meeting Paper no.952702 Validating AGNPS model with complex topography in central Korea Park,S.W.;J.T.Kim
  7. J. of the Hydraulics Div. ASCE v.98 no.HY12 Sediment yield computed with univrsal equation Williams,J.R.;H.D.Berndt
  8. USDA conservation Research Report v.35 AGNPS, Agricultural Non-Point Source Pollution Model: A Watershed Analysis Tool Young,R.A.;C.A.Onstad;D.D.Bosch;W.P.Anderson