梁滩河地表水与地下水水化学及硝酸盐污染

Water Chemistry and Nitrate Pollution of Surface Water and Groundwater in Liangtan River

运用水化学分析技术测定了三峡库区受人类活动影响的梁滩河地表水和地下水水体的水化学和硝酸盐氮污染水平。结果表明:自流域中上游,地表水体均受到了污染,并且向下游呈现出污染加重的趋势;在流域上游和中上游,地下水体受地表水体的影响,呈现出严重的污染,上游地下水硝酸盐氮污染呈现出超标趋势。受河水下渗的影响,梁滩河流域地下水中的硝酸盐氮浓度自上游而下至中游呈现出急剧升高的趋势,上游和中游区域之间的地下水的硝酸盐浓度超过了10 mg/L的标准,而向流域下游和河口处呈现出浓度降低的趋势。

Nitrate pollution level of the surface water and groundwater in the Liangtan River basin at Three Gorges Reservoir area, which is influenced by human activities,is measured by water chemistry technology. The results show that ： the surface water from the middle-upper reaches to the basin is polluted, and the pollution of lower reaches is inclined to a more serious degree; the groundwater is also serious polluted due to the influence of surface water, and Nitrate and Nitrogen concentration of groundwater inclines to exceed the qualified standard. By the impact of river water infiltration, Nitrate and Nitrogen concentration of groundwater in Liangtan River shows a sharp increase from the upper reaches to the middle reaches. Nitrate concentration of groundwater in upstream and middle reaches exceeds the qualified standard of 10 mg/L, and the concentration of that inclines to lower at the downstream and the mouth of river.