地下水是水资源的重要组成部分,由于其分布广、水质好以及便于利用等特点,成为很多地区主要的、甚至是唯一的供水水源[1]。溶解性总固体(total dissolved solids,TDS)是溶解在水里的无机盐和有机物的总称,是指水样经过滤后,在一定温度下烘干所得的固体残渣,包括不易挥发的可溶性盐类、有机物及能通过过滤器的不溶性微粒。其主要成分有钙离子、镁离子、钠离子、钾离子、碳酸离子、碳酸氢根离子、氯离子、硫酸根离子和硝酸 Groundwater is an important part of water resources. Due to its wide distribution, good water quality and ease of utilization, groundwater has become the main or even the only source of water supply in many areas [1]. Total dissolved solids (TDS) is a collective term for inorganic salts and organic matter dissolved in water. It refers to the solid residue obtained by drying the water sample at a certain temperature after filtration, including non-volatile soluble salts , Organic matter and insoluble particles that can pass through the filter. Its main components are calcium, magnesium, sodium, potassium, carbonate, bicarbonate, chloride, sulfate and nitrate