岩溶地下水化学组分随降水周期变化的规律性——以桂林、柳州地区为例

利用岩溶水长期水化学监测资料进行数理统计和制图，揭示了不同类型岩溶地下水化学成分的变化与降水丰、枯季节、丰枯周期年变化的规律性。纯灰岩地区岩溶水的主要化学组分表现枯季高、丰季低；白云岩地区岩溶水则不显示此规律性，丰、枯季节主要组分含量变化不大，甚至有相反趋势的显示。降水丰枯周期年的变化在岩溶水化学成分的变化上，也有很好的显示。枯水周期年，岩溶水主要化学组分含量逐年增高，丰水周期年则逐年降低

THE VARYING REGULARITY OF MAJOR CHEMICAL COMPOSITIONS OF KARST WATER WITH PRECIPITATION CYCLE

Mathematical statistics and maps drawn with long term hydrochemical monitoring data of karst water show the varying regularity of hydrochemical compositions of different types karst underground water with precipitation high and low water period as well as high and low water circle year. In pure limestone region, the content of major chemical compositions of karst water is higher in low water period and lower in high water period; but in dolomite region, that of karst water doesn't show this regularity, it varies a little or tends to the contrary.The variation of hydrochemical compositions of karst water can be well reflected in the variation of precipitation high and low water circle year. In low water circle year, the major hydrochemical compositions content increases year by year. However, in high water circle year it decreases.Recognizing these regulities is helpful to appraise water quality and to reveal the pollution mechanism of karst water.