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Piedmont region drinking wells exceed North Carolina's hexavalent chromium standards（图）
Piedmont region drinking wells North Carolina hexavalent chromium standards
2019/12/2
A new study that combines measurements from some 1,400 drinking water wells across North Carolina estimates that more than half the wells in the state's central region contain levels of cancer-causing...
Measurement of the Hydraulic Conductivity of Gravels Using a Laboratory Permeameter and Silty Sands Using Field Testing with Observation Wells
observation wells permeameter tortuosity
2014/10/31
A new laboratory permeameter was developed for measuring the hydraulic conductivity of gravels ranging from 0.1 to 2 m/s. The release of pneumatic pressure applied to the test specimen induces an unde...