鄂尔多斯盆地浅层地下水水化学形成规律研究

摘要

Ordos desert plateau is composed of desert,lake basin and low-lying land. Shallow groundwater plays an important role in agricultural and animal husbandry. This paper took it as the target zone,through field survey,experiments,and drawing concluded that from the piedmont of Baiyu Mountains to the lake basin areas,the chemical composition of shallow groundwater appeared from HCO3 -Ca(Ca·Mg)to Cl·HCO3 -Na ·Mg and Cl·SO4 -Na,and mineralization,water hardness,pH and 3N enhanced accordingly. Influenced by formation litho logy,the shallow groundwater showed the highly mineralizing in piedmont of the Baiyu Mountains. This paper preliminarily discussed the forming conditions of the shallow groundwater,as to provide a basis for animal husbandry’s development and eco-environmental protection in research area.%鄂尔多斯盆地沙漠高原由沙漠、湖盆、洼地组成，区内浅层地下水及其水质对农牧业供水和维持表生生态具有十分重要的作用。以研究区浅层地下水为目的层，通过野外调查、取样、试验分析、编图、总结得出：区内浅层地下水的水化学成分呈明显的分带性，由白于山前向北到湖盆洼地区，地下水化学类型由HCO3-Ca（Ca·Mg）型向Cl·HCO3-Na· Mg型和Cl·SO4-Na型过渡，矿化度、硬度、pH值以及三氮均相应增高。其中在白于山前受地表岩性即黏性土、黄土状土、细沙及中细沙等细颗粒物质的影响，局部呈现矿化度高值区。