摘要
为摸清沈阳市某装备制造产业园地下水污染运移规律,科学指导当地生态环境管理部门开展工作,以该园区为研究对象,采用有限差分法,建立了该区域地下水水流数值模型,并利用地下水数值模拟软件(GMS软件)模拟预测了连续源强和瞬态源强污染物泄漏情景下1年、5年、10年及20年后污染物在地下水中的运移情况。经计算得到结论如下:①连续源强污染物泄漏情景下,氨氮在1年、5年、10年及20年后最大运移距离分别为208m、235m、416m和550m;②瞬态源强污染物泄漏情景下,镍在1年、5年、10年及20年后最大运移距离分别为314m、425m、546m和710m。综上,在园区未进行地面防渗的前提下,两种情景泄漏均会对地下水造成污染,且扩散范围会随着时间逐渐扩大,但污染物浓度变化情况与源强直接相关。其研究结果为项目地下水环境影响评价预测和相应污染防治措施提供技术支持,同时也为科学指导当地生态环境管理部门开展相关工作提供依据。
In order to find out the groundwater pollution migration law in an equipment manufacturing industrial park in Shenyang and scientifically guide the work of local ecological environment management department,the paper took an equipment manufacturing industrial park in Shenyang as the research object,using the finite difference method,established a groundwater flow numerical model.Groundwater Modeling System(GMS)was used to simulate and predict the transport of pollutants in groundwater after 1,5,10 and 20 years under continuous source intensity and transient source intensity pollutant leakage scenarios.The results indicated that①under the scenario of continuous source strong pollutant leakage the maximum migration distances of ammonia nitrogen after 1,5,10 and 20 years are 208m,235m,416m and 550m,respectively;②under the scenario of transient source strong pollutant leakage,the maximum migration distances of nickel are 314m,425m,546m and 710m after 1,5,10 and 20 years,respectively.In conclusion,both leakage scenarios will lead to groundwater pollution with the absence of seepage prevention,and the pollutant diffusion range will gradually expand over time.However,the change in pollutant concentration was directly related to the source intensity.These results provided technical supports for the groundwater environmental impact assessment forecast as well as the pollution prevention,and also provide scientific guidance for the work of local ecological environment management departments.
作者
张楠
ZHANG Nan(Shenyang Academy of Environmental Sciences,Shenyang 110016,China;Liaoning Province Urban EcologyKey Laboratory,Shenyang 110167,China)
出处
《四川环境》
2022年第1期80-85,共6页
Sichuan Environment
基金
辽宁省自然基金指导计划项目(2019-ZD-0970)。
关键词
地下水
溶质运移
有限差分法
数值模拟
Groundwater
solute transport
finite difference method
numerical simulation
