کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4743963 1641835 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Barrier effect of underground structures on aquifers
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Barrier effect of underground structures on aquifers
چکیده انگلیسی

Impervious structures below the water table modify the natural groundwater flow in aquifers. They act as barriers, causing heads to rise upgradient and to fall downgradient. We define the barrier effect as the increase in head loss across the barrier with respect to the natural conditions prior to construction. We distinguish between regional (the minimum head loss observed at long distances) and local (the maximum head loss observed close to the structure) barrier effects. We use numerical and analytical methods to derive semi-empirical equations to quantify the two barrier effects for semi-permeable, partially penetrating (or fully penetrating but finite in length), and barriers with a by-pass in confined aquifers. The resulting equations depend on the barrier geometry and on the natural head gradient in the aquifer and they are easy to apply. We test their validity at two construction sites, obtaining excellent agreement between the computed and observed barrier effects.


► Underground structures that intersect aquifers modify the groundwater flow pattern.
► The barrier effect can have negative consequences.
► We propose analytical equations to calculate the barrier effect.
► The analytical equations are suitable for different types of barrier.
► We test the validity of the analytical equations at two construction sites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Geology - Volumes 145–146, 7 September 2012, Pages 41–49
نویسندگان
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