alluvial land造句怎么写

Tectonic movements took important roll for the evolution of alluvial landforms of the Kuitun River in the northern front of the Tisnshan Mountains.

Low-lying alluvial land adjacent to a river.

The arid lands surrounding the gulf produced little else and, except for the rich alluvial lands of the Mesopotamian plain, supported a small population of fishermen, date growers, and nomads.