采用普通克里金插值方法分析了松花江吉林段沿岸浅层地下水中NO32 N 浓度分布特征, 并探讨了地下水硝 酸盐污染的影响因素。结果发现: 常数趋势球型模型适用于描述研究区地下水NO32N 浓度分布空间变异性, NO32 N浓度在一定范围内存在空间相关性, 空间相关距离为5 478. 66 m; 超过地下水质量ó 类水标准20 mg / L 的 面积占研究区面积的62. 07 %; 人类活动对硝酸盐氮的空间分布的影响比水文地质条件影响显著。其中, 水文地质 条件包括降水量、包气带介质、土壤介质、地下水埋深、丰水期松花江补给两岸地下水的水力关系和以Fe2+ 、Mn2+ 作为电子供体的自养反硝化作用, 而人类活动影响主要包括农业施用的化肥、农药, 生活污水、工业废水排放, 垃圾 与粪便的淋滤液等。

The objectiv e of this study was to demo nstr ate the spatial distributio n of NO32N concentr ation based on an o rdinary kr ig ing method and to determine the influencing facto rs o f nitrat e po llut ion in t he unconfined aquifer o f Jilin sect ion along the So ng hua River . The r esult s indicated that a spher ical model with a co nstant or der o f r emo val t rend is appro pr iate to evaluate the spatial distributio n o f nitrate concent ratio n in g ro undw ater , and the spatial cor relat ion o f NO32N co ncentration ex ists w ithin a range o f 5 478. 66 m; the area w here NO32N concentr ation in g roundw ater ex ceeds the class III w ater standa rd ( 20 mg / L) ac2 counts for 62. 07% of t otal area; and human activ ities hav e g reater impacts on the spat ial distributio n o f nitr ate co ncentration in gr oundwat er than the hydr ogeo lo gical condit ions. H ydro geo log ical co nditions include t he precipitation, soil and vadose zo ne me2 dium, g ro undwater depth, hydraulic relatio nship betw een So ng hua River and gr oundw ater in w et season, and autot rophic denitr i2 ficat ion w ith Mn2+ and Fe2+ as t he electro n donor s. Impacts from human activ ities include the ag ricultura l application of fertiliz2 er s and pesticides, domestic sewag e, industr ial wastew ater emissions, and leachat e f rom g arbag e and feces.

国家/ 十一五0/ 水体污染控制与治理0 科技重大专项课题( 2008ZX072072007; 2009ZX074192003) ; 国家/ 十二五0 / 水体污染控制 与治理0 科技重大专项课题( 2014ZX072012 010)