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一个流域的地质、地貌条件决定了河流泥沙的岩石矿物组成及化学组成。作者设计了化学元素统计法,建立了计算细颗粒泥沙的数理模式,结合云南省大盈江流域的实例说明了本计算方法的具体应用。岩性统计法用于河流砾石的来源和数量计算已获得较好的效果。细粒泥沙(粒径小于2mm)的岩性鉴别和统计比较困难,工作量较大。为此,笔者设计了化学元素统计法。本文结合云南省大盈江流域的实例,对化学元素统计法作一简要介绍。
The geological and geomorphological conditions of a river basin determine the rock mineral composition and chemical composition of river sediment. The author has designed the statistical method of chemical elements and established the mathematical model for calculating fine sediment. Combined with the example of Daying River in Yunnan Province, the application of this method is illustrated. Lithological statistics for the river gravel source and the amount of calculation has been to obtain better results. Fine-grained sediment (particle size less than 2mm) lithology identification and statistics more difficult and more workload. To this end, I designed the chemical element statistics. This article combined with the instance of Daying River in Yunnan Province, a brief introduction of chemical element statistics.