【摘要】 为分析泰莱盆地地下水水化学特征及水质现状,选取2017年丰水期140件水样,其中,孔隙水样47件、岩溶水样61件和裂隙水样32件,运用数理统计、Piper三线图、箱型图等方法,分析了研究区主要离子及水化学特征,并运用模糊综合评价法、Wilcox图解法评价了水质现状及灌溉水质。结果表明,泰莱盆地主要阳离子为Ca²⁺、Na⁺,占阳离子总数的80%以上,主要阴离子为HCO₃^-、SO₄^2-,占阴离子总数的67%以上,其中NO3-含量也相对较高;水化学类型以HCO3·SO4-Ca型水为主;pH值整体呈弱碱性,TDS存在孔隙水>岩溶水>裂隙水的关系,这与地下水径流条件有关;Ⅳ、Ⅴ类水样占总水样的29.3%,影响因子为SO₄^2-、NO3-、TDS、总硬度,其主要影响因素为人为活动;绝大部分区域均属于好—可用及以上级别,合理利用地下水灌溉可有效预防土壤盐碱化问题。更多还原

【Abstract】 In order to analyze the hydrochemical characteristics and water quality status of groundwater in the Tailai Basin,47 samples of pore water,61 samples of karst water and 32 samples of fissure water in the wet period of 2017 were selected.By means of mathematical statistics,Piper’s three-line chart and box chart,the main ion and hydrochemical characteristics in the study area were analyzed.And then the water quality status and irrigation water quality were evaluated by using Wilcox graphic method and fuzzy comprehensive evaluation.The results show that the main cations in the Tailai Basin are Ca2+,Na+,accounting for more than 80% of the total cations,the main anions are HCO₃^-,SO₄^2-,accounting for more than 67% of the total anions,of which the content of NO3-is relatively high;The hydrochemical type is mainly HCO3·SO4-Ca water;The pH in the study area is weak alkaline as a whole,and TDS shows a relationship of pore water> karst water>fissure water,which is related to groundwater runoff conditions in the study area;The water samples of type IV and V account for 29.3%of the total water samples,and the influencing factors are SO₄^2-,NO3-,TDS and total hardness,which are mainly caused by the human activities;Most areas in the study area belong to good-usable and above levels,and rational use of groundwater irrigation can effectively avoid soil salinization in the region.更多还原