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当前位置: 首页 > 文章 > 吉林省西部苏打碱化土壤区地下水电导率分析与水质评价 农业环境科学学报 2007,26 (03) 141-146
Position: Home > Articles > Electrical Conductivity and Water Quality Evaluation of Groundwater at Sodic Soil Areas in the West of Jilin Province Journal of Agro-Environment Science 2007,26 (03) 141-146

吉林省西部苏打碱化土壤区地下水电导率分析与水质评价

作  者：
李彬;王志春;梁正伟;迟春明
单  位：
中国科学院东北地理与农业生态研究所
关键词：
苏打碱土;地下水;电导率;盐渍化;吉林省
摘  要：
通过现场采样及室内测试方法,研究了吉林省西部典型苏打碱化土壤区各深度地下水电导率与含盐量、离子总量(g·L-1,mmol·L-1)、离子强度(I)和离子组成的关系。结果表明,电导率与含盐量、阴阳离子总量以及离子强度之间均是极显著的正线性相关,其相关系数r均在0.99以上,因此电导率可以较好反映该区地下水盐分与离子总量状况。从地下水电导率与矿化度看,本区60～70m深度地下水质明显优于20～30m深度以内的地下水质。
译  名：
Electrical Conductivity and Water Quality Evaluation of Groundwater at Sodic Soil Areas in the West of Jilin Province
作  者：
LI Bin1,2,WANG Zhi-chun1,LIANG Zheng-wei1,CHI Chun-ming1(1.Northeast Institute of Geography and Agricultural Ecology,the Chinese Academy of Sciences,Changchun 130012,China;2.Graduate School of the Chinese Academy of Sciences,Beijing 100049,China)
关键词：
sodic soil;groundwater;electrical conductivity;salinization;Jilin Province
摘  要：
The climate is semi-humid and semi-arid in the west of Jilin Province,and groundwater is the primary water source for irrigation.At sodic soil area of this region,agricultural irrigation often brings soil salinization or secondary salinization when poor quality water used.In order to provide necessary theoretical supports for the sustainable utilization of groundwater resources,sustainable development of agriculture and ecological environment improvement,the electrical conductivity and ion concentration of groundwater at sodic soil area in the west of Jilin province were determined.Groundwater quality was evaluated based on the measured values of electrical conductivity and mineralization.The relationship between electrical conductivity and salinity,total ion concentration,ionic strength,ion concentration was analyzed.The sampling depth of groundwater was 6～7,20～30 and 60～70 m respectively.The results show:(1) The concentration of Na+ and HCO-3 within 30m depth is above 12 mmol·L-1,and the correspondent ion concentration at the depth of 60～70 m is greater than 5 mmol·L-1.The ionic ratio of rHCO-3/r(Cl-+SO2-4) exceeds 1.0 in the groundwater at three different depths(6～7,20～30,60～70 m),and the ratio rNa+/r(Mg2++Ca2+) is above 0.9.Therefore,NaHCO3 is the primary salt of groundwater at experimental areas,and the groundwater hydrochemical type is Na+-HCO-3.(2) Electrical conductivity is linearly related to salinity,total ion concentration,total cation and anion concentration,respectively,with the correlation coefficients above 0.99,so electrical conductivity can reflect the salinity and total ion concentration of groundwater well.(3) The linear relationship between electrical conductivity of groundwater and ionic strength is very significant,with the correlation coefficient 0.995.(4) Electrical conductivity of groundwater at the depth of 60～70 m is below 1.0 mS·cm-1,and above 2.0 mS·cm-1 at the both depth of 6～7 m and 20～30 m.The average mineralization of groundwater at the depth of 6～7,20～30,60～70 m is 1.679,2.314 and 0.880 g·L-1,respectively.Based on the measured values of electrical conductivity and mineralization,groundwater quality at the depth of 60～70 m is good(fresh water),but the water quality at the depth of 6～7 and 20～30 m is poor(weakly mineralized water and brackish water respectively).So,the groundwater at the depth of 6～7 and 20～30 m can not be used for irrigation,or else soil salinization would arise,while the groundwater at the depth of 60～70 m can be used for irrigation safely.

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