摘要
随着中国城市化进程的快速推进,地下水资源平衡遭到严重破坏,定量预测和评价地下水环境,合理开发利用地下水资源成为当今社会的迫切需求。本文选择模拟区南部以京杭运河为界,西北边和东北边至里运河,通过地下水流运动数学模型及地下水污染物迁移数学模型,选取COD和氨氮作为预测因子,分别预测污染发生100天、1000天及10000天后污染物迁移情况,重点预测对地下水环境保护目标的影响。研究表明:污水处理区的污染物的渗漏/泄漏对地下水影响范围较小,在本次预测评价方案条件下,无论是污染物最大运移距离,还是超标范围,事故工况均较正常工况下的结果大。此外,无论是正常工况还是事故工况下,污染物运移速度总体很慢,污染物运移范围不大。
With the rapid progress of urbanization in China,the balance of groundwater resources has been seriously damaged.Utilizing groundwater resources rationally has become an urgent need through quantitatively forecasting and assessing the groundwater environment.In this paper,Groundwater environment impact prediction on simulation area with the Beijing-Hangzhou Canal as southern boundary and Li Canal as the northwestern edge was assessed,through mathematical model of groundwater flow and mathematical model of groundwater pollutant migration.The COD and ammonia nitrogen are selected as forecasting factors to predict the occurrence of pollution for 100 days and 1000 respectively Days and 10000 days after the migration of pollutants,focusing on predicting the impact of groundwater environmental protection goals.The results show that:the leakage of sewage in the sewage treatment area has little influence on the groundwater,and under the conditions of this prediction and evaluation scheme,both the maximum transport distance of pollutants and the scope of the accident exceed the normal working conditions The result is big.In addition,the transport speed of pollutants is generally slow and the transport range of pollutants is not large,no matter under normal conditions or accident conditions.
作者
张振昌
余期冲
ZHANG Zhen-chang;YU Qi-chong(Academy of Environmental Planning&Design,Co.,Ltd.,Nanjing University,Jiangsu Nanjing 210093)
出处
《江西化工》
2018年第2期142-147,共6页
Jiangxi Chemical Industry
关键词
数值模拟
地下水
COD
氨氮
环境影响预测评价
Numerical Simulation
Groundwater
COD
ammonia nitrogen Environmental Impact Assessment
