一种实用的河流理想均衡剖面线算法与应用

以河流理想均衡剖面线为研究对象,深入探讨了地表水流对河床的塑造作用规律和河流均衡剖面线的形成机理,推导出均衡剖面线理论计算公式,并以黄河为例,结合我国自西向东三级地形结构,计算了三条均衡剖面线,L1为黄河全长均衡剖面线,L2和L3分别以托克托和松多为局部基准面计算的局部均衡剖面线,为黄河河床的演变规律研究和演化过程的计算机模拟提供了数学依据,同时对河流发育研究及侵蚀、搬运能力的探讨均有一定的理论意义。

An Operational Algorithm of the Ideal Equilibrium Profile Lines of Rivers

The paper paid much attention to Virtual Geographical Environments of ideal equilibrium profile lines of rivers. Surface runoff is one of the important factors figuring the earth's surface. The reconstructing action on the earth's surface by fluvial process, which includes erosion, mass transportation and accumulation, results in erosion and accumulation of landforms, and these two types of landforms have close relations with each other. Based on the mechanism of the formation of the equilibrium profile line of rivers presented by the geomorpholo gists, the paper deduced the theoretic formula of the equilibrium profile line. Because there are three landform stages in China from west to east, the paper calculated three equilibrium profile lines of the Huanghe River: L1 was the total equilibrium profile line of the Huanghe River, L2 and L3 were local equilibrium profile lines which took Togtoh or Songduo as local datum planes. The equilibrium profile lines of the Huanghe River have theoretic significance on the researches of the development of rivers and their capabilities of erosion and transportation.