河型的时空演变模式及其间关系

Temporal and spatial evolution models of fluvial channel patterns and their interrelation

从辫状河、曲流河和网状河的河型转化实例 ,归纳了 6种时间演化模式和 5种空间转化模式 ,并讨论了河型时空演变模式间的相互关系。河型的时空演变受控于构造运动、海平面变化、气候、植被、沉积体系的物质组成、流域的水沙供给状况和水动力条件等 ,上述因素彼此相关 ,但在不同的河型演变模式中的作用有所不同。

The six evolution models of ancient fluvial channel evolutions are determined according to fluvial depositional systems and five spatial transformation models of modern fluvial channel patterns in different rivers are discussed. There are certain relationships between temporal evolution models and spatial transformation models. The main factors influencing the spatial and temporal variations of fluvial styles are geotectonic movement, sea level changing, climate changing, vegetation, composition of sediments in floodplains, supply rate of water and sediments from river basin, and hydraulic condition. These influenced factors were related, but the effects were different for certain models.