CAJ | 학술논문

在GIS与RS技术支持下应用USLE模型对位于黄土高原西部的榆中县进行土壤侵蚀强度的定量估算,探讨区域土壤侵蚀的空间变异性以及与坡度梯度和土地利用方式之间的关系.得出榆中县的年均侵蚀总量为813137t,年均侵蚀模数为247t/km~2,并且土壤侵蚀的空间变异性明显,年均侵蚀模数与年均侵蚀总量随坡度梯度的增加都呈指数增加.在分析不同土地利用方式下的土壤侵蚀状况后发现,低覆盖度草地才是区域最主要的侵蚀地带.
재GIS여RS기술지지하응용USLE모형대위우황토고원서부적유중현진행토양침식강도적정량고산,탐토구역토양침식적공간변이성이급여파도제도화토지이용방식지간적관계.득출유중현적년균침식총량위813137t,년균침식모수위247t/km~2,병차토양침식적공간변이성명현,년균침식모수여년균침식총량수파도제도적증가도정지수증가.재분석불동토지이용방식하적토양침식상황후발현,저복개도초지재시구역최주요적침식지대.
Quantitative research on the soil erosion intensity in Yuzhong County, western Loess Plateau, was estimated via utilizing USLE model supported by GIS and RS technology. An analysis of spatial variability of regional soil erosion was discussed. Furthermore, the effect of slope gradient and land use patterns on erosion intensity also were mentioned. It is concluded that annual average sediment yield is 813137t and mean soil erosion rate is 247t/km~2 in Yuzhong whereas spatial variability of soil erosion is abrupt. When the slope gradient increases, mean soil erosion rates as well as total sediment yields increase exponentially.After analyzing soil erosion situations of different land use patterns, the results indicate that the low cover steppe is the place where major erosion occurs in the region.