The Nitrate concentrations in groundwater in the alluvial - diluvial fan of Zhangjiakou area has increased year by year.
张家口冲-洪积扇区地下水中的硝酸盐含量逐年升高。
Except the site at the station of Luntai belongs to alluvial and diluvial fan, all the sites are saline soil with strong erosion.
场地土除末站冲洪积扇外，其余均属盐渍土，对建筑基础有强腐蚀性。
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