南通市微咸水开发利用现状及资源化建议探析

Exploration and analysis on the status quo of development and utilization of brackish water in Nantong City and suggestions for resource utilization

通过对南通市浅层微咸水赋存条件及开发利用程度调查,评价区域浅层微咸水开发利用现状,对开发前景进行分析,提出远期资源化、合理化建议。结果认为:南通地区第Ⅰ承压含水层赋存丰富的矿化度为1.0~10.0 g/L的微咸水-咸水地下水,水质较差,不宜直接饮用。近年来主要作为工业冷却、地下水源热泵取用,用于厂房降温或建构筑物制冷供暖。从典型年份2011、2014、2016、2019和2020年每年统计的地下水开采量看,区域开采总量占可开采量基本在10%~16%之间,可开采量空间较大,主要集中在南通市主城区。远期微咸水现状利用率较低,具备开采潜力,市场开发利用前景较好。未来应加强微咸水等非常规水源利用的法律法规体系建设,制定开发利用专项规划,深入进行微咸水资源化配套技术研究,多种途径推进微咸水等非常规水源开发利用知识普及。分析结果以期为南通市非常规水源远期合理开发利用提供依据。

Through the investigation of the occurrence conditions and development and utilization of shallow brackish water in Nantong City,the current situation of regional shallow brackish water development and utilization is evaluated and the development prospect is analyzed,and long-term resource utilization and rationalization suggestions are put forward.The results show that:the first confined aquifer in Nantong area is rich in brackish water-salt groundwater with a salinity of 1.0~10.0 g/L,and the water quality is poor,so it is not suitable for direct drinking.In recent years,it is mainly used as industrial cooling and groundwater source heat pump,used for cooling of workshops or cooling and heating of buildings.Judging from the annual statistics of groundwater exploitation in typical years 2011,2014,2016,2019 and 2020,the total regional exploitation accounts for basically between 10%and 16%of the recoverable amount,and there is a large space for the recoverable amount,mainly concentrated in main city of Nantong.The current utilization rate of brackish water in the long-term is relatively low,it has potential for exploitation,and the prospect of market development and utilization is good.In the future,it is necessary to strengthen the construction of laws and regulations for the utilization of unconventional water sources such as brackish water,formulate special plans for development and utilization,conduct in-depth research on supporting technologies for brackish water resources,and promote the popularization of knowledge on the development and utilization of unconventional water sources such as brackish water in various ways.The analysis results are expected to provide a basis for the long-term rational development and utilization of unconventional water sources in Nantong City.