潇河灌区地表水硝酸盐污染特征及来源解析  

Characteristics and Source Analysis of Surface Water Nitrate Pollution in Xiaohe Irrigation District

作　　者：刘婷 孟志龙 白欣茹 LIU Ting;MENG Zhilong;BAI Xinru(School of Biological Science and Technology,Taiyuan Normal University,Shanxi Jinzhong 030619,China)

机构地区：[1]太原师范学院生物科学与技术学院,山西晋中030619

出　　处：《太原师范学院学报（自然科学版）》2023年第3期69-75,共7页Journal of Taiyuan Normal University:Natural Science Edition

基　　金：山西省基础研究计划青年科学研究项目(202103021223325);山西省水利科学技术厅研究与推广项目(2023GM35).

摘　　要：随着土地利用方式越来越多样化,潇河灌区地表水水质逐渐恶化.为研究潇河灌区地表水硝酸盐污染时空分布特征及其来源,采用2021年10月和12月潇河地表水中NO_(3)^(-)-N浓度实测数据,运用Arc GIS和统计学方法,结合水化学因子相关关系分析了地表水NO_(3)^(-)的时空分布规律及主要来源.结果表明,潇河灌区地表水呈弱碱性,各采样点硝酸盐浓度均为超出浓度阈值.空间插值法揭示了潇河灌区地表水NO_(3)^(-)时空分布特征,时间上,2021年10月硝酸盐浓度均值低于12月;空间上,硝酸盐浓度沿河流流向呈逐渐升高的趋势.NO_(3)^(-)/Cl^(-)与Cl^(-)的相关关系表明潇河灌区地表水NO_(3)^(-)-N主要来源为农业化肥、生活污水及人畜粪便.本研究可为潇河灌区河流硝酸盐来源解析与污染治理提供理论参考.With the diversification of land use,the surface water quality in Xiaohe Irrigation District has gradually deteriorated.In order to study the spatial and temporal distribution characteristics and sources of nitrate pollution in surface water in Xiaohe Irrigation District,the measured data of NO_(3)^(-)-N concentration in surface water in Xiaohe River in October and December 2021 were used to analyze the spatial and temporal distribution rules and main sources of NO_(3)^(-)in surface water by Arc GIS and statistical methods combined with the correlation of water chemical factors.The results showed that the surface water in Xiaohe Irrigation District was weakly alkaline,and the nitrate concentration at each sampling point exceeded the concentration threshold.The spatial interpolation method revealed the spatial and temporal distribution characteristics of NO_(3)^(-)in surface water in Xiaohe Irrigation District.In terms of time,the mean nitrate concentration in October 2021 was lower than that in December.Spatially,the concentration of nitrate increased gradually along the river.The correlation between NO_(3)^(-)/Cl^(-)and Cl^(-)shows that the main sources of NO_(3)^(-)-N in surface water in Xiaohe Irrigation District are agricultural fertilizer,domestic sewage and human and animal manure.This study can provide theoretical reference for the analysis of river nitrate sources and pollution control in Xiaohe irrigation area.

关 键 词：潇河灌区 地表水 硝酸盐 分布特征 水化学因子 

分 类 号：X522[环境科学与工程—环境工程]