新疆石河子地区地下水硝酸盐含量分布及影响因素分析

为了初步掌握石河子地区平原区地下水硝酸盐污染状况,通过调查取样分析,对研究区地下水硝酸盐含量状况及其影响因素进行了研究。结果表明,石河子地区地下水硝酸盐含量普遍较低,仅有3.03%的取样点超过《生活饮用水卫生标准(GB5749-2006)》。研究区内地下水硝酸盐氮含量空间分布特征显著,水平分布特征表现为从南到北逐渐降低,垂向分布特征表现为潜水区硝酸盐氮含量高于承压水区。影响地下水硝酸盐氮含量的主要因素包括含水层特性、地下水氧化还原条件、降水量等自然因素以及氮肥施用量、种植制度和农业污染源等人为因素。该研究对石河子地区饮水安全和地下水保护有现实意义。

Distribution of Nitrate Contents in Groundwater of Shihezi Area, Xinjiang Autonomous Region, China and Its Influencing Factors

In order to understand the state of nitrate nitrogen (N) contamination of groundwater in the plain of Shihezi Area in Xinjang Autonomous Region, China, nitrate-N contents in groundwater and its influencing factors were studied. Results show that the nitrate contents in groundwater of Shihezi area are generally low, and only 3.03% of the data are higher than the national standard for drinking water quality (GB5749-2006).The distribution characteristics of nitrate-N in the study area are significant in that the nitrate-N contents gradually decrease from south to north, and the nitrate-N contents in unconfined groundwater area are higher than those in confined groundwater. Nitrate-N content is affected by natural factors and human factors. The natural factors include aquifer characteristics and redox conditions of groundwater, precipitation and human factors include quantity of nitrogen fertilizer, planting system and agricultural contamination, etc.