Finally the groundwater pollution remediation technologies have been considered , and the principals of groundwater pollution control and remediation in china have been discussed 提出了建立地下水污染的预警系统，为污染的预防奠定基础；介绍了地下水污染的控制与修复技术，并对地下水污染防控和治理的基本原则进行了探讨。
A third concern is that pollutants in soils and ground water , once introduced , remain there for a long time , due both to the chemical stability of many of the compounds involved , and the extremely slow rates at which ground water is circulated or exchanged 第三个涉及的是土壤和地下水污染，由于所含的许多化合物的化学性质稳定及地下水循环或交换速率极低，这种污染一旦发生就会残留很长时间。
The article is based on the present situation of development and utilization of groundwater resources , analyzes and summarizes its existed questions , such as pollution of groundwater , the over - exploited funnel of groundwater , safety of drinking water and so on 摘要在概述沈阳市地下水开发利用现状基础上，分析总结了沈阳市目前地下水资源开发利用中存在问题，如：地下水污染、地下水超采漏斗、饮用水安全等。
Based on the investigation and g1s software of arc view , an environmental geochemistry gis of the shallow groundwater in city zone and close suburb of beijing is developed . the system can do many jobs for the environmental data of groundwater such as collection , storage , management , analysis and calculation , which shows a powerful function in spatial search , analysis , display and programing . in the two years of 2000 and 2001 本文在详细调查北京城近郊区浅层地下水污染情况的基础上，根据需要，对地理信息系统软件arcviewgis3 . 2a进行了二次开发，建立了北京城近郊区浅层地下水环境地球化学gis系统，实现了对地下水环境数据的采集、存储、管理、分析、计算和图形显示等多种功能，展示了强大的空间查询、分析和编程能力。
Preliminary treatment covers removal of larger suspended solids and heavier inorganic particulates through mechanical bar screening , gravitational sedimentation and flotation to keep the subsequent unit operations and processes from clogging and abrasion and to maintain the designed functions of the equipment . commonly used preliminary treatment equipment includes bar screen , fine particle sieving , grit chamber , pre - aeration , grease well and scraping chamber , etc . domestic companies have the capability of manufacturing all equipment except fine sieves 两大类，其他还有地下水污染处理、海洋港口污染处理、水库湖泊污染处理等，所需之处理设施大致有拦污设备、沉砂设备、除油设备、沉淀设备、过滤设备、生物处理相关设备、污泥脱水设备、加药设备、高级处理相关设备等。
The results of groundwater vulnerability research can provide a useful tool in land use planning , groundwater protection planning and groundwater quality monitoring . they can also help the pubic know more about groundwater pollution risk and have the idea of prevention taking priority in groundwater protection 地下水脆弱性研究成果可以为土地利用规划、地下水水资源保护规划、地下水水质监测等提供参考，也可以提高公众关于地下水污染的风险意识，树立以防为主的思想。
The author dealts with the groundwater pollution control and remediation in china . 4 types and 15 sub - types of groundwater pollution sites have been classified in china , the pollution prevention measures and plans have been discussed , and the groundwater pollution early warning system has been proposed , which lays the foundation for polluted site management 将地下水污染场地划分为4大类， 15个亚类，为制定不同地下水污染场地的管理、控制和修复规定提供了依据；对地下水污染防治规划的内容和方法技术进行了论述。
The research on the mechanism of transportation , migration , enrichment and degradation of the different contaminants in soil and groundwater so as to set up the regional groundwater quality background index , distribution of monitoring and control of groundwater contamination , and to start planning investigation and assessments of groundwater contamination for the criterion and technical standards on the regional groundwater vulnerability 研究不同污染物质在土壤和地下水介质中传输、运移、富集、消解的机理和过程，建立区域地下水质量背景值指标体系，开展地下水污染监控与防治技术体系、地下水污染调查、评价方法及其相应的规程、规范和技术标准体系研究，开展区域地下水脆弱性研究。
