The relationship between values of hydraulic conductivity determined from grain-size methods,K gr, and those from pumping-test methods,K pt, have been evaluated statistically using data from recent and older sandy materials. It is shown that both methods generally give the same values only in recent sediments that have not been subjected to significant diagenetic alteration and give variable results in older and diagenetically altered sediments. The ratioK pt/Kgr appears to vary, probably in response to the degree of diagenetic alteration. It is further found that methods incorporating the effects of grain size (d1O or d50) and sorting could give betterK values than those incorporating the effect of grain-size only and, thus, suggest the joint inclusion of both parameters in the grain-size determination of permeability.
Environmental Geology 03/1994; 23(3):171-181. DOI:10.1007/BF00771786