نتایج جستجو برای: groundwater vulnerability

تعداد نتایج: 69923  

Journal: :Environmental science & technology 2011
Ratan K Dhar Yan Zheng Chad W Saltikov Kathleen A Radloff Brian J Mailloux Kazi M Ahmed Alexander van Geen

Dissimilatory metal-reducing bacteria can mobilize As, but few studies have studied such processes in deeper orange-colored Pleistocene sands containing 1-2 mg kg(-1) As that are associated with low-As groundwater in Bangladesh. To address this gap, anaerobic incubations were conducted in replicate over 90 days using natural orange sands initially containing 0.14 mg kg(-1) of 1 M phosphate-extr...

2004
Randall J. Hunt Tyler B. Coplen Nathaniel L. Haas David A. Saad Mark A. Borchardt

Because surface water can be a source of undesirable water quality in a drinking water well, an understanding of the amount of surface water and its travel time to the well is needed to assess a well’s vulnerability. Stable isotope ratios of oxygen in river water at the City of La Crosse, Wisconsin, show peak-to-peak seasonal variation greater than 4‰ in 2001 and 2002. This seasonal signal was ...

2013
Tahoora Sheikhy Narany Mohammad Firuz Ramli Ahmad Zaharin Aris Wan Nor Azmin Sulaiman Kazem Fakharian

The main aim of monitoring wells is to assess the conditions of groundwater quality in the aquifer system. An inappropriate distribution of sampling wells could produce insufficient or redundant data concerning groundwater quality. An optimal selection of representative monitoring well locations can be obtained by considering the natural and anthropogenic potential of pollution sources; the hyd...

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