大连市地表水化学特征分析

Analysis of chemical characteristics of surface water in Dalian

为全面掌握大连市天然水体化学特征情况,采用总硬度、矿化度以及阿列金分类对大连市44个地表水功能区监测断面的地表水化学特征进行评价,结果表明:大连市地表水化学特征矿化度以低中等矿化度为主,总硬度主要为硬水和极硬水,水化学类型以C^CaⅢ型水为主。此外对全市25条主要河流的矿化度、总硬度和地表水化学类型分布规律及占比情况进行了分析,发现大连市矿化度和总硬度均由东北部的庄河向西南地区的旅顺呈增加趋势。该研究可为大连市的环境决策提供有效的信息,对于水环境保护和实现可持续发展具有重要意义。

In order to fully grasp the chemical characteristics of Dalian’s natural water bodies, the surface water chemical characteristics of 44 monitoring sections in Dalian’s surface water functional areas are evaluated by using total hardness, salinity and Alekin classification. The results show that the chemical characteristics of Dalian’s surface water are mainly low and medium salinity, the total hardness is mainly hard water and extremely hard water, and the hydrochemical type is mainly C^CaⅢ water. In addition, the distribution and proportion of salinity, total hardness and surface water chemical types of 25 major rivers in the city were analyzed. It was found that the salinity and total hardness of Dalian increased from Zhuanghe in the northeast to Lüshun in the southwest. This study can provide effective information for Dalian’s environmental decision-making and is of great significance for water environment protection and sustainable development.