赤峰西部沙漠区高铁地下水的形成及其主要特征

赤峰沙漠区是一个农牧业基地,其地下水量较丰富,井涌水量一般100—500t/d。主要受大气降水入渗补给,并以地下潜流形式排入西拉木伦河和达来诺尔。水化学类型复杂,且含铁量普遍超标,一般1-5mg/L,最高达60mg/L。水中铁量与pH 值基本上呈非线性负相关关系,与总硬度、耗氧量、矿化度呈线性相关关系。基岩和第四系中含铁矿物是水中铁的主要来源。

THE MAJOR CHARACTERISTICS AND FORMATION OF THE HIGH FERRIC GROUNDWATER IN THE DESERT AREA OF WEST CHIFENG

The Chifeng desert area is an agricultural and anirmal husbandry base with relatively abundant groundwater re-sources. The pumping discharges are in 100--500t/d. The recharges mainly come from meteoric water infiltration, which dis-charge to the Silumulon River and the Dalizoer Lake in the way of phreatic flow with various hydrochemical types. In general,the iron content is above the standard, from 1 to 5mg/L, up to 60mg/L in maximum. The iron content has approximately non-linear negative correlation with pH value and linear correlation with the total hardness, oxygen consumption and salinity re-spectively. The iron in groundwater mainly comes from ferriferous minerals in the bedrocks and Quarternary sediments.