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2007 Ground Water Summit |
Wednesday, May 2, 2007 : 3:00 p.m.
Assessing Changes in Riverbank Filtration System Yield Over Time
As riverbank filtration systems are used yields can decline over time. Reduction in flow capacity can be not only a result of clogging of the intake structures (wells and galleries), but also a function of clogging of the riverbed whereby the leakance of the riverbed deteriorates. Careful hydraulic analysis can be applied to assess the causes of such reductions in pumping system capacity. This information is vital in guiding rehabilitation activities and decisions on future pumping system expansion.
David C. Schafer, David Schafer & Associates David Schafer is an independent groundwater consultant with 35 years of experience in the groundwater industry. He serves as a national groundwater expert in the areas of well design, well construction, well development, groundwater hydraulics and groundwater modeling. During his career, Mr. Schafer has written numerous technical articles, lectured to universities, professional organizations and government agencies, and written ASTM standards on pumping test analysis.