CAJ | 학술논문

使用修正的通用土壤流失方程RUSLE，综合考虑降雨、土壤可蚀性、地形、土地覆盖和水土保持措施等因素，计算得密云水库上游地区1990年、2000年和2008年3期的土壤侵蚀数据，并对土壤侵蚀变化结果及其原因进行分析，发现：①研究区近20年水土流失状况经历由加剧到减轻的过程，但总体来说是减轻的，1990～2008年减轻区面积和加剧区面积分别为3083．11 km2和2287．71 km2；②研究区水土流失变化的原因主要为以土地利用类型变化为特征的人为因素，降雨也有影响，而与坡度没有关系。
사용수정적통용토양류실방정RUSLE，종합고필강우、토양가식성、지형、토지복개화수토보지조시등인소，계산득밀운수고상유지구1990년、2000년화2008년3기적토양침식수거，병대토양침식변화결과급기원인진행분석，발현：①연구구근20년수토류실상황경력유가극도감경적과정，단총체래설시감경적，1990～2008년감경구면적화가극구면적분별위3083．11 km2화2287．71 km2；②연구구수토류실변화적원인주요위이토지이용류형변화위특정적인위인소，강우야유영향，이여파도몰유관계。
In this paper, the author uses RUSLE and takes into account rainfall , soil erodibility, topography, land cover and soil con-servation practice to calculate soil loss of three years of 1990 , 2000 and 2008 in Miyun reservoir upstream .Then the change of soil e-rosion and the reason of it are analyzed .Finally two conclusions are properly drawn:1) the soil erosion intensity has undergone an in-crease in the first decade , and then decreased process .But on a whole it has been decreased .From 1990 to 2008 , the areas of de-creased and increased soil erosion intensity are 3083.11 km2 and 2287.71 km2 respectively;2) it is mainly because of factitious fac-tors characterized by change of land use types that the intensity of soil erosion has been changed .Rainfall has some influence , too. But it has nothing to do with slope steepness .