Simulation of Groundwater Zones of Contribution Wells at Site GM-38, Naval Weapons Industrial Reserve Plant, Bethpage, New York

摘要

A three-dimensional groundwater-flow model is coupled with the particle-tracking program MODPATH to delineate zones of contribution to wells pumping from the Magothy aquifer and supplying water to a chlorinated volatile organic compound removal plant at site GM38, Naval Weapons Industrial Reserve Plant, Bethpage, New York. By use of drillers logs, a transitional probability approach generated three alternative realizations of heterogeneity within the Magothy aquifer to assess uncertainty in model representation. Finer-grained sediments with low hydraulic conductivity were realized as laterally discontinuous, thickening towards the south, and comprising about 17 percent of the total aquifer volume.