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广东是我国地热资源最为丰富的省区之一。论文通过从相关文献查询和采样的方法,共收集到广东10个不同区域的15个不同地热水的理化性质指标。重点对其pH值、离子含量、矿化度、氟含量、重金属含量、砷含量等进行分析,并结合农田灌溉水质标准对其尾水的农用适宜性进行了初评,结果表明:氟含量是限制其农用性最主要的限制因子,其次是氯化物,矿化度是第三限制因子。广东大部分地区地热水不适宜直接农用,适当稀释后可用作农田灌溉水。为了更好地补给地热水,减缓地热水资源衰减趋势,建议建立科学合理的回灌系统。
Guangdong is one of the provinces with the most abundant geothermal resources in our country. Through the methods of querying and sampling from related literatures, the paper collected a total of 15 different geothermal water physical and chemical properties of 10 different areas in Guangdong. The pH value, ion content, salinity, fluoride content, heavy metal content, arsenic content and so on were mainly analyzed, and the farmland suitability of the tail water was evaluated based on the farmland irrigation water quality standard. The results showed that the content of fluoride was limited The main limiting factor of its agricultural use, followed by chloride, salinity is the third limiting factor. Geothermal water in most parts of Guangdong is not suitable for direct agricultural use, after appropriate dilution can be used as farmland irrigation water. In order to replenish geothermal water better and reduce the declining trend of geothermal water resources, it is suggested to establish a scientific and rational recharge system.