Michael J Langland

• Changes in bottom-surface elevations in three reservoirs on the lower Susquehanna River, Pennsylvania and Maryland, following the January 1996 flood
• Nutrient and triazine-herbicide concentrations in streams of the Chickies Creek Basin, south-central Pennsylvania, during low-flow conditions
• Yields and trends of nutrients and total suspended solids in nontidal areas of the Chesapeake Bay basin, 1985-96