The statistics show that from 1994 to 2001 the area of land, grass, holt and exposed land increased, while the saline land, dene, gobi and wetland decreased.
结果表明，从1994-2001年，全流域的旱地、草地、林地、裸岩地面积增加，盐碱地、沙地、戈壁和湿地面积减少。
TP, rapid available phosphorus, organic content and rapid available iron were gradually decreased in the top soil layer of wetland along the flow path.
总体而言，来水中的磷、有机质和速效铁以沿程逐渐降低的方式分布于湿地表层土壤中。
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