城市湖泊环境地下水氮污染机制及其对富营养化调控的基础研究--以杭州西湖为例

本研究拟以西湖流域水环境为研究对象，开展西湖流域地下水氮污染机制及其对富营养化调控的基础研究。利用环境地球化学研究理论和手段，结合氮氧同位素方法，运用Visual MODFLOW模型，以期进行西湖流域地下水及湖水氮污染的源解析，阐明地下水氮污染机制，预测地下水氮污染物的入湖通量，探讨引起氮输送量变化的影响因素，阐明流域地下水及其营养物质（N）渗入湖泊的机理，力求为有效抑制西湖水体氮污染提供重要的理论依据，为地下水和湖泊水力交互作用提供理论依据，为营养物质随地下水入湖通量计算提供基础数据，将有利于城市湖泊水质的达标控制和水资源的有效利用。

This work is proposed to deal with research on the nitrogen pollution mechanism in groundwater and the theory about the influence of groundwater on eutrophication control in the West Lake watershed. The water environment in the West Lake watershed will be studied by using the theory and method of the environmental geochemical study, using nitrogen isotope and oxygen isotope and using Visual MODFLOW. The nitrogen sources in the surface water and groundwater will be indicated. The nitrogen pollution mechanism of groundwater will be expounded. The flux of pollutants into the lake from groundwater and the factors effected the flux will be predicted. The mechanism about the groundwater and its nutrients (N) into the West Lake will be expounded. The research could provide the scientific basis to control nitrogen pollution in the West Lake. It has the theoretical basis for hydraulic interaction between groundwater and lakes and could provide basic data on calculation about fluxes of groundwater nutrients into the lake and has effective utilization of water resources in the urban lakes watershed.