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水土流失区与无流失区的划分,直接关系到侵蚀模数的标准、水土流失分区、水土保持规划以及水土保持措施的布设。我们在淳化县泥河沟流域的水土流失调查中,就这一问题作了初步探讨。 一、流域概况 泥河沟流域位于淳化县东部黄土高原沟壑区,属冶峪河一级支流,面积9.54平方公里。该流域多年平均降水量600.6毫米,七、八、九三个月降水量为316.5毫米,占全年降水量的53％。流域最高点海拔1193.5米,最低点海拔712.5米,相对高差481米。常态地貌为塬、坡、沟,坡面面积占总面积的
The division of soil erosion area and non-lost area is directly related to the standard of erosion modulus, soil and water loss zoning, soil and water conservation planning and the arrangement of soil and water conservation measures. In the survey of soil and water loss in Nihegou Basin of Chunhua County, we made a preliminary discussion on this issue. I. Introduction to the Basin The Nihegou drainage basin is located in the gully area of the Loess Plateau in the east of Chunhua County. It is a tributary of the Yeyuhe River and covers an area of 9.54 square kilometers. The basin has an average annual rainfall of 600.6 millimeters, with a precipitation of 316.5 millimeters for the seventh, eighth and ninth months, accounting for 53% of the annual rainfall. The highest point of the basin 1193.5 meters above sea level, the lowest point of 712.5 meters above sea level, the relative elevation 481 meters. Normal landform for the plateau, slope, ditch, slope area of the total area