David J Holtschlag

• A generalized estimate of ground-water-recharge rates in the Lower Peninsula of Michigan
• A two-dimensional hydrodynamic model of the St. Clair-Detroit River Waterway in the Great Lakes Basin
• Assessment of ground-water vulnerability to atrazine leaching in Kent County, Michigan
• Changes in water quality of Michigan streams near urban areas, 1973-84
• Cost effectiveness of stream-gaging program in Michigan
• Flow model of Saginaw River near Saginaw, Michigan
• Hydrodynamic simulation and particle-tracking techniques for identification of source areas to public-water intakes on the St. Clair-Detroit River Waterway in the Great Lakes basin
• Statistical models for estimating daily streamflow in Michigan
• Statistical models for estimating flow characteristics of Michigan streams
• Steady-state flow distribution and monthly flow duration in selected branches of St. Clair and Detroit Rivers within the Great Lakes Waterway
• Stream discharge in Michigan
• Vulnerability of ground water to atrazine leaching in Kent County, Michigan