Field study of hydrogeologic characterization methods in a heterogeneous aquifer.

摘要: Hydraulic conductivity (K) and specific storage (S(s)) are required parameters when designing transient groundwater flow models. The purpose of this study was to evaluate the ability commonly used hydrogeologic characterization approaches accurately delineate distribution hydraulic properties in a highly heterogeneous glaciofluvial deposit. metric compare various prediction drawdown responses from three separate pumping tests. conducted at field site, where 15 m × area instrumented with four 18-m deep Continuous Multichannel Tubing (CMT) wells. Each CMT well contained seven 17 cm 1.9 monitoring ports equally spaced every 2 down each system. An eight 1-m long screens also placed center square pattern. In these boreholes, cores were collected characterized using Unified Soil Classification System, grain size analysis, permeameter To date, 471 K estimates have been obtained through analyses 270 empirical relationships. Geostatistical analysis small-scale data yielded strongly fields three-dimensions. Additional slug tests 28 Several multiscreen wells obtain larger scale both S(s). S(s) then quantitatively evaluated by simulating 3D forward numerical model constructed HydroGeoSphere (Therrien et al. 2005). Results showed that, while predictions generally improved as more complexity introduced into model, make accurate all inconsistent.