摘要
通过研究焦作地区浅层地下水中"三氮"污染量、污染分布特征,分析研究了污染源、水文地质条件对地下水"三氮"的形成、迁移、转化、分布规律的影响。结果表明:硝酸盐氮、氨氮、亚硝酸盐氮的污染分布分别呈现面状、条带状和点状分布;农业上含氮化肥和农药的过量使用是浅层地下水"三氮"污染的主要原因,工业污水直接排入含水层是污染中心浓度极高的重要原因;包气带的碱性氧化环境是硝酸盐氮广泛分布的重要条件,大沙河侧漏补给是氨氮呈现条状分布的主要因素。
How the pollution sources and hydrogeology conditions can influence the pollution load, regularities of distribution, migra- tion and transformation of ＂three nitrogen＂ in ground water were analyzed and studied after research was done on the pollution load and pollution distribution of ＂three nitrogen＂ in shallow groundwater of Jiaozuo Area. The results show that nitrate nitrogen, ammo- nia nitrogen and nitrite nitrogen pollution present planar distribution, banded distribution and dotted distribution; over committing agricultural nitrogen fertilizers and pesticides are the main reasons for the ＂three nitrogen＂ pollution in shallow groundwater, the in- dustrial sewage directly discharged into aquifer are the important reasons why the pollution center has so high a pollution concentra- tion. One important reason why nitrate nitrogen is widely distributed is that there is alkaline and oxydic environment in the area, side leakage of Dasha River is the main factor of ammonia nitrogen presenting banded distribution.
出处
《中国农村水利水电》
北大核心
2013年第2期38-40,44,共4页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(41101530,31270586)
国家高技术研究发展计划(“863”计划)资助项目(2012AA061705)
关键词
浅层地下水
三氮
污染特征
污染机制
焦作地区
shallow groundwater
three nitrogen
pollution characteristics
pollution mechanism
Jiaozuo Area
