摘要
本文较为系统地将河型成因的各种研究方法按其所依据的理论分类,并指出了各种理论之间的内在联系。文中讨论了各种研究方法所具有的优缺点、各研究方法之间的互补作用以及各种研究方法在表面处理方式不同的背后所隐藏的使河流趋向某一极值状态(或稳定状态)的共同倾向,并据此指出了进一步研究河型成因问题时的侧重面。
The approaches for studying channel pattern used by various investigators have been classified according to their theoretical basis in this paper, such as hypothesis on geomorphic thresholds, extremal hypothesis on energy dissipation rate, theory of stability, theory of stochastic analysis and method of statistic analysis. The advantages and shortcomings of each theory and the internal relations among those approaches have been exhaustively discussed. It was pointed out that the general tendency of those approaches is to find out thmost probable, equilibrium or extremal state of the natural rivers, even though the methods used are quite different. It was concluded that in studying the cause of channel pattern formation, study on the mechanism in the process of river pattern development and study on the geomorphic thresholds due to various boundary conditions of rivers should be emphasized and combined with each other. The importance of establishment of more reliable constitutive relationships of water and sediment motion and the experimental study in laboratory are also stressed.
出处
《地理学报》
EI
CSSCI
CSCD
北大核心
1991年第3期366-372,共7页
Acta Geographica Sinica
关键词
河流
河型
成因
界限
极值
稳定性
River pattern
Threshold
Extremal value
Stability
