Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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A study of comparison about estimation methods of sediment yield

토사유출량 산정식에 대한 비교연구

  • Received : 2020.10.06
  • Accepted : 2020.10.24
  • Published : 2020.12.31
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Abstract

In this study, results of RUSLE which is most popular equation for estimating sediment and MSDPM and LADMP have been compared and analyzed by applying to real watershed of mountain area. Crop factor (C), preservation factor (P), and soil erosion factor (VM) of RUSLE can be subjectively selected and differently applied. Therefore, effects of those factors were estimated and compared with different values of factors. Furthermore, sediment yield has been estimated by MSDPM and LADMP according to 10, 20, 30, 50, 100, and 200 year return period. From the results, it was found that sediment yield can be resulted with 400% diffrence. And it was also found that MSDPM and LADMP can be applied in mountain area of Korea.

본 연구에서는 토사유출량 산정에 가장 많이 사용되고 있는 RUSLE방법과 MSDPM, 그리고 LADMP를 실제 산지하천에 적용하여 토사유출량을 비교·분석하였다. 기존 토사유출량 산정 시 사용자가 주관적으로 선택할 수 있는 식생피복인자(C), 보전관리인자(P), 토양침식조절인자(VM)가 토사유출량 산정결과에 미치는 영향을 비교하였다. 또한 MSDPM과 LADMP을 사용하여 10년, 20년, 30년, 50년, 100년, 200년 빈도 재현기간의 강우강도에 의한 토사유출량을 산정하고, RUSLE의 결과값과 비교 분석하였다. 이를 통하여 식생피복인자(C), 보전관리인자(P), 토양침식조절인자(VM)값에 따라 토사량의 차이가 최대 400%까지 발생하는 것을 확인할 수 있었으며, MSDPM과 LADMP의 국내 적용 가능성을 확인하였다.

Keywords

References

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