تغير مواقع الأنهار و علاقتها ببناء السهل الفيضي

الملخص EN

The geomorphologic phenomenon of changing the rivers' sites by the rivers' precipitation is tackled in detail in this research through studying the relationship between the river twists and the emergence of the flowage plain.

The research also shows the different criteria of measuring the river twists like using the proportion between the length of the current and of the valley in order to show the behavior of rivers that have single stream.

These rivers move in a twisted manner because of the reflexive movements.

The research shows the mechanism of forming the flowage plain by the river twists, which becomes clear in the maturity of the river's life.

This phenomenon becomes clearer through hewing in the sides of concave twists and precipitation in their convex sides.

In this stage, the river begins to form the flowage plain from the great amounts of alluvial precipitations that cover the surface of the valley.

The river becomes active in expanding its flow, while it lacks the ability to become deep because there is no vertical hewing.

In the stage of late maturity of forming twists, the flowage plain becomes so wide and covered with alluvial precipitations.

The length of the twisting wave increases vastly too.