西大滩地区泛指银川灌区第二农场渠以东,第三排水沟以西,北界燕窝池,略呈NE—SW 向的狭长地带。该地区西依贺兰山东麓洪积倾斜平原,东界黄河冲积平原,属山前洪积—冲积交替沉积带。山前洪积倾斜平原坡降较大,沉积物为洪积粗粒碎屑物质,土壤质地粗,以淡灰钙土为主。黄河冲积平原地形平坦,沉积物为河漫滩相的细粒物质,土壤为灌淤土。西大滩地区则是以上两带的交接过渡地带,地形平坦,在低洼处是积水湖沼,发育有各类盐土;略高处,广泛分布着白僵土,成为我区大面积连片的白僵土地区,由于改良不易,至今仍为“光板 Xida beach area refers to the second Yinchuan Irrigation farm east of the canal, west of the third drainage ditch, northbound bird’s nest pool, slightly NE-SW to the narrow strip. In the area, the alluvial slopes east of the Helan Mountains and the alluvial plain of the Yellow River in the eastern boundary lie in the foreland alluvial-alluvial sedimentary belt. Piedmont alluvial slope plain slope larger, sediment alluvial coarse debris material, coarse texture of the soil, mainly to light gray soil. The alluvial plain of the Yellow River has a flat terrain and the sediment is fine-grained material of river floodplain. The soil is irrigated silt. The area of ​​Xida Beach is the transition zone between the two belts. The terrain is flat and there are lakes and lakes in the low-lying areas. There are various kinds of saline soils. At the slightly higher elevation, white dead soil is widely distributed and becomes a large area contiguous in our area Bai stiff soil area, due to difficult to improve, is still "light board