Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Prediction of the Suitable Area on Erosion Control Dam by Sediment Discharge in Small Forest Catchments

산림소유역 토사유출량에 의한 사방댐 시공적지 예측기법 개발

  • Lee, Sung-Jae (Seoul National University Forest) ;
  • Kim, Seon-Jeong (Gyeongsangnamdo Forest Environment Research Institute) ;
  • Lee, Eun-Jai (Forest Technology and Management Research Center, National Institute of Forest Science) ;
  • Ma, Ho-Seop (Department of Forest Environmental Resources, Gyeongsang National University(Institute of Agriculture and Life Science))
  • 이성재 (서울대학교 학술림) ;
  • 김선정 (경상남도산림환경연구원) ;
  • 이은재 (국립산림과학원 산림기술경영연구소) ;
  • 마호섭 (경상대학교 환경산림과학부(농업생명과학연구원))
  • Received : 2020.07.07
  • Accepted : 2020.11.04
  • Published : 2020.12.31
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Abstract

The characteristics of forest environmental factors were analyzed using the quantification theory (I) for prediction of the suitable area of erosion control dams. The results indicated that sediment discharge in small forest catchments was significantly correlated with dredging passage (0.7495) and age class (0.6000). In contrast, area (0.3416), slope gradient (0.3207), rainfall (0.3160), altitude (0.2990) and soil type (0.2192) were poorly correlated. Following quantification theory (I), we developed a selection decision table for erosion control dams based on sediment discharge rate as class I (highly suitable site, greater than 2.2496), class II (suitable site, 1.1248~2.2495), and class III (poorly suited site, lower than 1.1247).

본 연구는 산림소유역에 시공되어 있는 사방댐내의 토사유출량에 영향을 미치는 산림환경 인자를 분석하고 수량 화이론(I)를 이용하여 예방적인 측면에서 사방댐 시공적지를 선정하고 예측하였다. 각 산림환경 인자의 범위를 추정한 결과, 준설경과년수(0.7495)가 가장 높게 나타나 산림소유역 토사유출량에 큰 영향을 미치는 것으로 추정되었으며, 다음으로는 경급(0.6000), 소밀도(0.5318), 유역면적(0.3416), 사면경사(0.3207), 강수량(0.3160), 고도(0.2990), 토양형(0.2192)순으로 나타났다. 각 인자의 범주별 상대점수를 74개 사방댐의 각종 인자에 반응시켜 사방댐의 시공적지를 예측할 수 있는 판정표를 개발하였고, 판정표를 이용하여 시공적지를 I급지(Very suitable site) 2.2496 이상, II급지(Suitable site) 1.1248~2.2495, III급지(Poor suitable site) 1.1247 이하로 구분하였다.

Keywords

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