%0 Journal Article
%T Nitrate Storage and Transport Within a Typical Karst Aquifer System in the Paralleled Ridge-valley of East Sichuan<br>川东平行岭谷区典型岩溶含水系统中NO3-的存储和运移
%A YANG Ping-heng
%A YUAN Dao-xian
%A REN You-rong
%A XIE Shi-you
%A HE Qiu-fang
%A HU Xiao-feng
%A <br>杨平恒
%A 袁道先
%A 任幼蓉
%A 谢世友
%A 贺秋芳
%A 胡晓风
%J 环境科学
%D 2012
%I 
%X In order to investigate the nitrate storage and transport in the karst aquifer system, the hydrochemical dynamics of Qingmuguan underground river system was monitored online by achieving high-resolution data during storm events and monthly data in normal weather. The principal component analysis was employed to analyze the karst water geochemistry. Results showed that nitrate in Jiangjia spring did not share the same source with soluble iron, manganese and aluminum, and exhibited different geochemical behaviors. Nitrate was derived from land surface and infiltrated together with soil water, which was mainly stored in fissure, pore and solution crack of karst unsaturated zone, whereas soluble iron, manganese and aluminum were derived from soil erosion and directly recharged the underground river through sinkholes and shafts. Nitrate transport in the karst aquifer system could be ideally divided into three phases, including input storage, fast output and re-inputting storage. Under similar external conditions, the karstification intensity of vadose zone was the key factor to determine the dynamics of nitrate concentrations in the groundwater during storm events. Nitrate stored in the karst vadose zone was easily released, which would impair the aquatic ecosystem and pose seriously threats to the local health. Thus, to strengthen the management of ecological system, changing the land-use patterns and scientifically applying fertilizer could effectively make a contribution to controlling mass nutrient input from the surface.
%K karst groundwater
%K unsaturated zone
%K geochemistry
%K nitrate
%K storm events
%K Qingmuguan<br>岩溶地下水
%K 非饱和带
%K 地球化学
%K NO3-
%K 降雨条件
%K 青木关
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=B5A93E035C82D3EF2AF998099F25B4BE&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=9CF7A0430CBB2DFD&sid=D3A1CFE94F348BC6&eid=159D47119828ADFD&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=55