福建省地表水化学特征变化情况及成因分析

Analysis of surface water chemical characteristics change and causes in Fujian

为了解福建省地表水化学特征变化情况,本文通过实测数据对现状进行了评价分析。结果显示:福建省各河流地表水化学特征基本良好,属于低矿化度软水区,水化学分布特征具有一定的地带性,矿化度、总硬度分布大致相同,呈西南高东北低状态。与第二次全国水资源调查评价成果进行比较,矿化度和总硬度总体呈上升趋势,水化学类型仍以重碳酸盐类为主。对水化学特征变化而言,除自然因素外,人类活动的影响也较为明显。

In order to understand the changes of chemical characteristics of surface water in Fujian,this paper evaluates and analyzes the present situation through measured data.The results show that the hydrochemical characteristics of surface water in all rivers in Fujian are basically good and belong to soft water areas with low salinity.The hydrochemical distribution characteristics have certain zonality.The distribution of salinity and total hardness are approximately the same,showing a state of high southwest and low northeast.Compared with the evaluation results of the second national water resources survey,the mineralization degree and total hardness show an overall upward trend,and the hydrochemical type is still dominated by bicarbonate.In addition to natural factors,human activities have obvious influence on the changes of hydrochemical characteristics.