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黄土高原水土流失地区的水土保持是一项面宽量大的群众性建设工作,实践证明,按小流域进行综合治理,效果好,深受群众欢迎,而开展小流域综合治理,首先就得有一个好的规划。这就必须摸清流域的自然、社经条件,分清流域内各类地貌的侵蚀方式和程度。 本文试图根据水力侵蚀的基本原理,推求小流域(一般指面积10平方公里以下的流域及侵蚀沟)现代地貌形态与水力侵蚀能量之间的相互关系。这种关系一般只需算出主要地貌要素,即可求出流域侵蚀分类指标,并可预估其侵蚀程度和发展趋势。
Soil and water loss in the areas with soil erosion in the Loess Plateau is a mass construction work with a large amount of land and a large amount of land. Practice has proved that comprehensive control by small watersheds is effective and well received by the masses. To carry out comprehensive management of small watersheds, firstly, A good plan. This must find out the natural and social conditions of the basin and distinguish the ways and degrees of erosion of all kinds of topography within the basin. Based on the basic principles of hydraulic erosion, this paper attempts to deduce the relationship between modern topography and hydraulic erosion energy in small watersheds (generally, watersheds and erosion ditches below 10 km2). Generally speaking, this relationship only needs to calculate the main geomorphological elements, then the index of erosion classification can be obtained and the degree of erosion and development trend can be estimated.