基于协调发展度的冲积河流的河型判别式

Discrimination of channel patterns based on coordinated developmental degree

借鉴社会与经济或环境与经济的协调发展理念,利用长江、黄河等12个河段的实测资料,研究了河型的影响因子对河型的影响权重,建立了河流系统的协调发展度判别式,用来判断冲积河流的河型。研究认为:河流边界条件对河型的影响大于来水来沙条件;弯曲河流的协调发展度大于游荡河流和过渡河流。根据协调发展度大的河流比协调发展度小的河流稳定有序,可以为冲积河流的河型分类与判别提供有力的理论依据和具体的计算方法。

The concept of coordinated development in the sciences of society and economy or of environment and economy is used in this paper. Based on 12 river sections data on the Yangtze and Yellow Rivers, their weights are determined, as different factors influencing the stability and transformation of channel patterns in various degrees. The discrimination is established by coordinated developmental degrees of different channel patterns. The results show that the influence on channel pattern by river boundary conditions is greater than the incoming flow and sediment conditions; the coordinated developmental degree of the meandering river is greater than the wandering river and the transitional river, indicating that the coordinated developmental degree of rivers is proportional to their stability and ordering. Therefore, the proposed method is important for the classification and discrimination of alluvial rivers.