Joseph W. Troester

• Geochemical properties and saline-water intrusion in the Valle de Yabucoa alluvial aquifer, southeastern Puerto Rico
• Geochemistry and hydrogeologic framework of the saline-freshwater interface and the calculation of net recharge in the Dorado area, north-central Puerto Rico
• U.S. Geological Survey ground-water studies in Puerto Rico
• U.S. Geological Survey ground-water studies in the U.S. Virgin Islands