伊犁河流域绿洲土壤盐渍化与浅层地下水水化学特征分析

Oasis Soil Salinization and Hydrochemical Characteristics of Groundwater in Yili Valley

通过开展新疆伊犁谷地水文地质环境地质调查评价项目,结合野外采集浅层地下水样及土壤易溶盐样品成果资料,运用相关分析方法,对伊犁河流域绿洲土壤盐分与地下水埋深及浅层地下水水化学特征之间的关系进行了分析,结果表明:伊犁河流域盐渍化土壤分布主要受地下水埋深控制,且埋深小于3m范围内较为突出,同时受地下水水化学类型影响,集中分布在SO4型、SO4.Cl型、C1.SO4型水区域.伊犁河流域地下水埋深偏正态曲线拟合结果与土壤盐分随地下水埋深变化情况基本一致,说明伊犁河流域控制土壤盐渍化的地下水调控水位为3m以下.

Through the development of Xinjiang Yili valley of hydrogeology and environmental geology investigation and evaluation of project,combined with the field collection of shallow underground water and soil soluble salt data sample results,using the correlation analysis method of oasis soil salinity and groundwater in Yili River Basin,the depth and the relationship between the hydrochemical characteristics of shallow groundwater are analyzed,the results showed that soil salinization distribution in Yili river basin is mainly affected by the control of deep groundwater,and the buried depth is less than the range of 3 m is more prominent,and affected by the water chemical types of groundwater,concentrated in the SO4 type,Cl type,SO4-C1-SO4 type water region.In the Yili River Basin,the groundwater depth is normal,and the curve fitting results are basically consistent with the change of soil salinity and groundwater depth.It shows that the groundwater regulation level under the control of soil salinization in the Yili river basin is below 3 m.