and Protection of Water Resources
Georgia Pacific Corporation
Developed three dimensional saltwater intrusion model extending
through nine geologic units for determining the cause of unusual T-shaped
chloride plume in Brunswick, Georgia. Study similar in scope to ongoing
seven year multimillion dollar modeling effort by the USGS to understand
the mechanism of saltwater intrusion in the area. Study identified vertical
intrusion of relict seawater through a complex network of faults and solution
cavities (extending 3,000 feet below ground) as the cause of contamination.
Model utilized to develop various remedial strategies including installation
of guardian wells, injection wells, and pressure relief wells to mitigate
contamination in the area.
Harrison County Water District No. 12
Constructed groundwater model of the drift-filled pre-glacial valley
underlying the service area of Harrison County Public Water Supply District
No. 2 in northwest Missouri. Model utilized to determine the extent and
lithologic framework of the relatively narrow buried glacial channel.
Conducted 20-year time horizon simulations to determine the aquifer safe
yield and to identify optimal locations of the proposed wellfield.
St Johns River Water Management District
Developed a regional multi-aquifer groundwater model spanning 19 counties
in northeast Florida and southeast Georgia. The model simulates complex
subsurface hydrodynamics in the aquifers, which extend to depths in excess
of 2,500 feet and containing groundwater of variable quality ranging from
fresh to relict-seawater. The model is to be used as the primary technical
tool by the District for Water Supply Needs and Sources Assessment mandated
by the Florida legislature for managing water resources over a 25-year
Ballard & Associates
Groundwater modeling and wellfield design project for City of
Alexandria, LA to meet future water demand. City is considering competing
alternatives ranging from development of $36 million wellfield to construction
of $60 million surface water facility. Model developed to evaluate long-term
groundwater potential and to design optimal wellfield-distribution system
and operating sequence in order to minimize construction and operating
costs over a thirty-year life cycle.
Jonesboro City Water & Light
Developed multilayer aquifer model to evaluate safe yield of the deep
Wilcox aquifer in northeast Arkansas. A sixty day pump test was conducted
and water levels monitored in an extensive observation network for identification
and calibration of aquifer parameters critical for inducing recharge to
the deep aquifer. Model results revealed interesting characteristic of
deep aquifers, which are expected to experience water level declines for several decades
prior to stabilizing on account of induced recharge.
Pinellas County Water Systems
Developed a safe yield density-dependent flow and solute transport model
to assist in formulating environmentally sound and quantitatively efficient
water management policies under conditions of encroaching seawater.
St. Johns River Water Management District
Coordinated team effort to construct a regional-scale density-dependent
flow and solute transport model for groundwater resource evaluation and
saltwater intrusion analysis in Seminole County, Florida. Model provided
technical basis for optimal allocation of groundwater resources from present
and proposed municipal wellfields.