Hydrogeology of Clay Till in a Prairie Region of Canada
Hydrogeology of Clay Till in a Prairie Region of Canada
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DOI：
10.1111/j.1745-6584.1988.tb00794.x
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发表时间：
1988-09
期刊：
影响因子：
--
通讯作者：
M. Hendry
中科院分区：
文献类型：
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作者：
M. Hendry
对加拿大阿尔伯塔南部内陆平原地区的三个研究区的粘土质冰碛物厚剖面进行了水文地质和同位素调查。冰碛物由上部风化带（9至18米厚）和下部非风化带（10至30米厚）组成。在风化带地下水位以下5米深处存在氚化地下水，表明风化带上部水文地质活跃。水头和水力传导率数据的解释表明，在非风化冰碛区的垂直渗透速度范围为2至6米每1000年。计算的横向地下水速度在冰碛区只有约9米每1000年，它的结论是，大部分的地下水补给风化冰碛区返回到大气中的蒸散。风化冰碛带地下水样品的氧-18和氘分析支持这一结论。
Hydrogeologic and isotopic investigations were conducted on thick profiles of clayey glacial till at three study areas in the Interior Plains Region of southern Alberta, Canada. The till consists of an upper weathered zone (9 to 18 m thick) and a lower nonweathered zone (10 to 30 m thick). The presence of tritiated ground water at depths of up to 5 m below the water table in the weathered zones shows that the upper part of the weathered zone is hydrogeologically active. Interpretation of hydraulic head and hydraulic conductivity data, indicates that vertical seepage velocities in the nonweathered till zones range from 2 to 6 m per 1000 years. Calculated lateral ground-water velocities in the till zones are only about 9 m per 1000 years, and it is concluded that most of the ground water recharging the weathered till zone is returned to the atmosphere by evapotranspiration. Oxygen-18 and deuterium analyses of ground-water samples for the weathered till zones support this conclusion.