三峡库区箭滩河硝酸盐氮及亚硝酸盐氮分布特征

Distribution Characteristics of Nitrate Nitrogen and Nitrite Nitrogen in the Jiantan River Basin in the Three Gorges Reservoir Area

于枯水期采集三峡库区箭滩河沿线38个地点地表水样和沿途农村饮用井水/泉水13个水样,分别测定了水体中硝酸盐氮、亚硝酸盐氮含量;分析了枯水期箭滩河地表水及饮用井水中硝酸盐氮和亚硝酸盐氮分布及变化特征;阐明了地表水、地下水体中硝酸盐氮和亚硝酸盐氮浓度之间的相关关系,及硝酸盐氮和亚硝酸盐氮浓度与高程之间的关系。研究结果表明:箭滩河流域沿程农村饮用井水中NO3-N超标较为严重,提出要重视农村饮用井水的安全问题。

38 samples in surface water and 13 samples in drinking water wells in rural areas are collected in the Jiantan River in the Three Gorges Reservoir area during the low water period.Nitrate nitrogen and nitrite nitrogen in the samples are measured and analyzed to depict the distribution of nitrate and nitrite pollution in the studied basin.Correlativity analysis reveals the relationship between the nitrate nitrogen and the nitrite nitrogen level of the surface water samples in the study basin.The NO3-N is serious exceeded in rural drinking water wells along the Jiantan River Basin,and the importance of the safety of drinking well water in rural areas is proposed.