Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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A Study of Distribution of Rainfall Erosivity in USLE/RUSLE for Estimation of Soil Loss

토양유식공식의 강우침식도 분포에 관한 연구

  • Park, Jeong-Hwan (Division of Water Researces and Environmental Engineering, Korea Institute of Construction Technology) ;
  • U, Hyo-Seop (Division of Water Researces and Environmental Engineering, Korea Institute of Construction Technology) ;
  • Pyeon, Jong-Geun (Depart. of Civil and Environmental Engrg., Myongji University) ;
  • Kim, Gwang-Il (Korean Society of Civil Engineers)
  • 박정환 (한국건설기술연구원 수자원환경연구부) ;
  • 우효섭 (한국건설기술연구원수자원환경연구부) ;
  • 편종근 (명지대학교공과대학.환경공학과) ;
  • 김광일 (대한토목학회)
  • Published : 2000.10.01
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Abstract

Climate factors such as rainfall, temperature, wind, humidity, and solar radiant heat affect soil erosion. Among those factors, rainfall influences soil erosion to the most extent. The kinetic energy of rainfall breaks away soil particles and the water flow caused by the rainfall entrains and transport them downstream. In order to estimate soil erosion, therefore, it is important to determine the rainfall erosivity. In this study, the annual average Rainfall Erosivity(R) in Korea, an important factor of the Universal Soil Loss Equation(USLE) and Revised Equation(RUSLE), has been estimated using the nationwide rainfall data from 1973 to 1996. For this estimation, hourly rainfall data at 53 meterological stations managed by the Meterological Agency was used. It has been found from this study that the newly computed values for R are slightly larger than the existing ones. It would be because this study is based on the range of rainfall data that is longer in period and denser in the number of gauging stations than what the existing result used. The final result of this study is shown in the form the isoerodent map of Korea.

토양침식에 영향을 미치는 기후 인자로는 강우, 기온, 바람, 습도 및 태양열 복사 등이 있다. 이들 인자 중 강우는 토양침식에 직접적인 영항을 미친다. 강우의 운동에너지는 토립자의 이탈을 유발하며 강우로 인해 발생하는 흐름은 이탈 토립자를 연행시킨다. 토양침식을 예측하는데 있어 이러한 강우의 영향을 나타내는 지표의 설정은 중요한다. 본 연구에서는 범용토양유실공식(USLE)과 개정공식(RUSLE)의 강우침식도 R의 추정을 위해 1973년부터 1996년 까지 24년간 전국 53개 기상청 관측소의 강우 자료를 이용하였다. 본 연구에서 이용한 강우자료는 모든 관측소에 대해 동일 기간이며, 최근 24년간의 자료를 바탕으로 하고 있다. 본 연구의 최종 결과는 우리 나라의 등강우침식도로 나타내었다.

Keywords

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