점토함량, 경사, 그리고 토양수분변화가 우곡간 침식에 미치는 영향: 단일크기복합인공강우기를 이용하여
The Effects of Mud Content, Slope Angle, and Soil Water Changes on Interrill Erosion Using by Single-sized Multi-drop Rainfall Simulator
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참고문헌
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초록
산사면에서 우곡간 침식과정을 연구하기 위하여 복합방울인공강우기 중 단일크기강우기를 이용하여 인공강우 실험을 실시하였다. 실험지역은 여주화강암으로 동일 기반암이나, 토양입도특성이 다른 두 지역을 선정하였다. 인공강우는 사면경사 10도와 20도에서 각각 실시되었으며, 강우 중에 실시간으로 토양수분변화를 모니터링 하였으며 연구결과는 다음과 같다. 첫 번째, 점토질 성분이 높은 곳과 경사가 큰 곳에서 보다 많은 유출과 토양침식이 발생하였다. 이는 sealing 및 crusting 효과가 점토질 성분이 많을수록, 경사가 급한 곳일수록 커짐을 의미한다. 두 번째, 토양수분변화와 투수율 변화와의 관계는 역의 관계가 추정된다. 세번째, 지표유출은 누적강우에너지 73~235(J/m2/10min)의 범위에서 형성된 것으로 나타났으나, 지표유출 형성과 관련하여서는 자연강우에서의 실험이 요구된다.
Abstract
Rainfall simulating performed to know the processes of interrill erosion on mountainous slope using by single-sized drop simulator. The two areas simulated by rainfall were laid on same bedrock as Yeoju Granite, but their soil characters are different. Rainfall simulating performed on 10 and 20 slope degree, respectively, and also soil water monitored contemporary with rainfall simulating. We suggest like below from simulating results; First, the runoff and soil loss increased as mud content and slope degree increasing, i.e. the effects of sealing and crusting made more runoff and soil loss on high mud content and steep slope angle, repectively. Second, the relationship with the change of soil water and infiltration rate were shown negative function but needs additional research to know more about this relationship. The last, runoff generated between 73 and 235(J/m2/10min) of comulative rainfall energy, but the experiments under natural rainfall and other rainfall simulator are needed to discuss rainfall energy how to contribute on runoff generation.
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