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井灌区浅层地下水硝态氮含量时空分布特征

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为了探明井灌区地下水硝态氮的污染现状及其主要影响因素,选择山东省桓台县马桥镇、荆家镇、田庄镇、起凤镇为研究区,利用聚类分析、Piper三线图、相关性分析等方法,研究浅层地下水水化学特征、硝态氮含量时空分布特征以及影响地下水硝态氮含量的主要因素.结果表明,研究区地下水化学类型主要为SO42--Na+型,地下水硝态氮的质量浓度为3.40～46.08 mg/L,平均值为24.67 mg/L,超标率达63.70%;在时空分布上,丰水期的地下水硝态氮含量大于其他时期的,中南部、西部的地下水硝态氮含量大于东部的;研究区浅层地下水的弱碱性氧化环境有利于硝态氮的形成;研究区地下水硝态氮含量受人类活动影响显著,农业氮肥施用和农村居民生产生活污水、人畜粪便随意排放是导致地下水硝态氮含量较大的主要原因.
Temporal-Spatial Distribution Characteristics of Nitrate Content in Shallow Groundwater in Well Irrigation Area
To investigate the current situation and main influencing factors of groundwater nitrate nitrogen pollution in well irrigation area,Maqiao Town,Jingjia Town,Tianzhuang Town and Qifeng Town in Huantai County,Shandong Province were selected as the research area.Cluster analysis,Piper three-line graph and correlation analysis were used.The char-acteristics of water chemistry,temporal-spatial distribution characteristics of nitrate nitrogen content in shallow groundwa-ter and the main factors affecting nitrate nitrogen content in groundwater were studied.The results show that the chemical type of groundwater in the study area is mainly SO42--Na+ type,and the mass concentration of nitrate nitrogen in ground-water ranges from 3.40 mg/L to 46.08 mg/L,with an average value of 24.67 mg/L,and the over-standard rate is 63.70％ .In terms of temporal-spatial distribution,the nitrate nitrogen content of groundwater in wet period is higher than that in other periods,and the nitrate nitrogen content of groundwater in central and southern and western regions is higher than that in eastern regions.The weak alkaline oxidation environment of shallow groundwater in the study area is conducive to the formation of nitrate nitrogen.The nitrate nitrogen content of groundwater in the study area is significantly affected by human activities,and the main reasons for the high nitrate nitrogen content are the application of agricultural nitrogen fertilizer and the discharge of domestic sewage and human and animal manure by rural residents.

well irrigation areaground waterwater chemistry factornitrate nitrogentemporal-spatial distribution

刘鸿飞、潘维艳、田秀平、朱日清、樊爱鹏、焦贞、徐征和

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济南大学 水利与环境学院, 山东 济南 250022

山东省海河淮河小清河流域水利管理服务中心, 山东 济南 250014

井灌区 地下水 水化学因子 硝态氮 时空分布

国家自然科学基金项目山东省自然科学基金项目山东省自然科学基金项目小清河防洪综合治理工程科学研究试验项目济南大学科技计划项目

42007153ZR2020ME253ZR2019BEE035XQHFHZL-KY202003XKY1810

2024

10.13349/j.cnki.jdxbn.20240005.001

济南大学学报(自然科学版)
济南大学

济南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.441
ISSN：1671-3559
年,卷(期)：2024.38(2)
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