为防止西安世博园人工湖运营管理不当可能发生水质富营养化问题，研究者选用EFDC水动力学模型和WASP水质模型对世博园79公顷膜料防渗人工湖进行了变水质、变流量等四种情景下的模拟试验研究。研究表明，仅用于人工湖生态需水量而不考虑湖体循环用水量的最小直接补水时，水流速度缓慢，120天即出现营养物质累积、湖体水质开始富营养化。循环直接补水量控制在每秒1立方时，并不能有效地改变湖内水力条件不良“死区”的污染物累积现象。最小达标补水比最小直接补水效果明显，循环达标补水效果更好。研究认为，世博园人工湖水系经济安全运行最长天数为120天，于此同时必须构建湖内水生态系统，提高湖体自净能力。

    This study aims at resolving the problem of water eutrophication in Xi"an Expo Park artificial lake that occurs as a result of mismanagement. EFDC hydrodynamic model and WASP water quality model research are used on 79 hectares film waterproof artificial lake system in Xi"an Expo Park under the simulated examination conditions, including changing water quality and flow. Experimental research shows that only used for artificial lake ecological water requirements without considering the minimum directly-filling water of systemic circulation, nutrients will accumulate in 120 days because of slow water velocity and eutrophication occurs in the lake. When circulated direct replenishment is controlled with 1m3/s, the pollutant accumulation phenomenon can"t be effectively changed at "dead zone" of hydraulic condition badness in that artificial lake. The effect of minimum standard water is more obvious than minimal direct replenishment, and standard replenishment water with circulation is the best in four scenarios simulation. Research suggests that the longest economic security days was 120d in the artificial lake of Xi"an Expo Park, and maintenance ecosystem must be constructed so as to improve self purification capacity of the lake.