摘要
用能量的观点来解释坡度、坡长、降雨对坡面侵蚀产沙的影响。通过分析安塞水土保持研究站、晋西离石县王家沟小流域的小区资料,研究坡度、坡长、降雨对坡面侵蚀产沙的影响。结果表明:降雨特性(雨量、雨强)对坡面侵蚀产沙的作用最大,坡度次之,坡长最小;坡面侵蚀产沙的临界坡度分别受降雨、坡长大小的影响,临界坡长分别受降雨、坡度、坡长大小的影响;临界坡度、临界坡长都不是一个确定的值,但在一定范围内变化,变化范围由降雨、坡面地形等因素决定。研究成果可为黄土丘陵沟壑区坡面治理提供理论依据。
This paper tries to explain the effects of slope gradient, slope length and rainfall on slope erosion from the viewpoint of energy. Analyzing data about slope gradient, slope length and rainfall observed at Ansai station in Shanxi Province and Wangjiagou small watershed in Lishi, west of Shanxi Province, the author aims to know the influences of rainfall, slope gradient and slope length on slope erosion. The result shows that the influence of rainfall on slope erosion amount is the biggest, slope gradient is the second, and slope length is the smallest. Critical slope gradient is influenced by factors of rainfall and slope length, and critical slope length is influenced by factors of rainfall, slope gradient and slope length. Critical slope gradient or slope length is not a constant value, which varies in some ranges and depends on the factors of rainfall, slope type. The results provided the scientific theory basis for slope erosion control in the Hilly-gully region of Loess Plateau.
出处
《中国水土保持科学》
CSCD
2008年第2期32-38,共7页
Science of Soil and Water Conservation
基金
国家基金委员会重点基金项目(40635027)
中国科学院地理科学与资源研究所自然科学基金延伸支持领域前沿项目(CXIOG-A04-10)
关键词
临界坡度
临界坡长
降雨特性
坡面侵蚀产沙
黄土丘陵沟壑区
critical slope gradient
critical slope length
character of rainfall
slope erosion
Hilly-gully region of Loess Plateau
