新疆四周高山环绕,形成塔里木、准噶尔及许多内陆闭塞盆地和谷地。各内陆河向盆地中心汇集,愈向下面纵坡愈缓,土层变深厚;同时地下水流亦变缓,并且主要消耗于蒸发,因而引起地表盐份积聚和地下水浓缩。在广阔的洪积冲积平原和内陆湖、低洼地的周围形成着大面积的残余盐土和现代盐土。 Surrounded by mountains in Xinjiang, Tarim, Junggar and many inland block basins and valleys are formed. As the inland rivers converge toward the center of the basin, the more the longitudinal slope slopes downwards, the deeper and deeper the soil layer. At the same time, the groundwater flow also slows down and is mainly consumed by evaporation. As a result, surface salt accumulation and groundwater concentration are caused. In the vast alluvial alluvial plain and inland lakes, low-lying areas around the formation of a large area of ​​residual salt and modern saline soil.