With analysis of statistical results of soils in Baiyin city, we find out that soil in Dongdagou is in the situation of heavy metal contamination. This thesis has made a discussion about the source of heavy metal contamination pollution, and maintains that the main source of heavy metal contamination is caused by farmers irrigation, minor source of heavy metal contamination is caused by solids waste piling up, for example, chromium residue; and other sources brings about a little pollution to the soil, several preventive measurements for heavy metal pollution should be made concerning long-time accumulation of pollutant will cause a great enviromental pollution.%通过对白银市土壤调查结果进行评价分析,发现东大沟土壤重金属污染较为严重.同时对土壤重金属污染来源进行讨论,认为大面积土壤重金属来源主要是农民节流灌溉所引起的,小范围的土壤污染可能由于固体废弃物(如铬渣等)的堆存造成.其他污染源对土壤造成的污染较轻,但长期的污染物积累也会造成很大的污染.在此基础上提出防治重金属污染的措施.
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