华北平原桓台县地下水硝态氮含量的空间变异规律及其成因分析  

Analysis of spatial variability of nitrate content in groundwater and its factors in Huaitai county in North China plain

作　　者：陈淑峰[1] 胡克林[1] 刘仲兰 李帷[3] 潘志勇[1] 张军连[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100094 [2]山东省桓台县农业局,山东淄博256400 [3]中国科学院地理科学与资源研究所,北京130101

出　　处：《水科学进展》2008年第4期581-586,共6页Advances in Water Science

基　　金：国家重点基础研究发展计划(973)资助项目(2005CB121108);北京市生态重点学科项目(XK10019440)~~

摘　　要：对华北平原桓台县584个潜水水样的硝态氮含量进行了测定,应用地统计学方法对数据进行了分析,结果表明潜水硝态氮含量符合对数正态分布。采用Kriging方法对未观测点进行了估值,并绘制了等值线图,按照国家地下水质量标准划分的5个等级,利用GIS空间分析方法分别统计了各个乡镇潜水中硝态氮各等级的面积。同时把各乡镇单位面积化肥、人畜排泄、污水灌溉以及总的氮素年投入量与其潜水中硝态氮的平均含量分别进行了相关性分析,发现污水灌溉投入的氮素和各类氮素的总投入与潜水中硝态氮含量均有显著的相关关系,结果表明,污水灌溉对当地潜水硝态氮含量的影响很大,同时在对区域潜水硝态氮贡献的成因分析时必须考虑区域氮素的总投入。584 observed wells were sampled in Huantai County in North China Plain and the NO3-N content in every phreatic water were measured. The geostatistics and GIS technique are used to analyze the data. The results indicate that NO3-N concentration shows a lognormal distribution. The Kriging method is used to estimate the unobserved points and the distribution map of NO3-N concentration is generated. The areas of NO3-N content in phreatic water for each category are calculated according to the National Quality Standard for Ground Water in every town of Huantai County. The correlative analysis shows that there is a significant correlation between the annual total nitrogen input, wastewater irrigated and NO3-N concentration in phreatic water. It is showed that the wastewater irrigation contributed much to NO3-N content in phreatie water and the total nitrogen input should be considered in the region evaluation.

关 键 词：潜水 硝态氮 空间变异 成因分析 污水灌溉 

分 类 号：P641.2[天文地球—地质矿产勘探]