PUBLICATIONS
Significant Publications and Abstracts of Presentations
2005, Estimation of the water table for the Inland Bays watershed, Delaware Geological Survey Report of Investigations No. 68, 20 p. (with Martin, M.J.)
2005, Water table in the Inland Bays watershed, Delaware : Delaware Geological Survey Special Publication No. 27, 22 x 34" poster (with Martin, M.J.)
2005, Digital water-table data for Sussex County, Delaware: Delaware Geological Survey Digital Product DP05-01, ESRI grid format.
2005, Nanticoke watershed water-quality database: Delaware Geological Survey Digital Product DP05-02, MS Access 2003 Database (with Savidge, K., and Ullman W J.)
2004, The Cat Hill Formation and Bethany Formation of Delaware : Delaware Geological Survey Report of Investigations No. 67, 8 p.
2004, Ground-water recharge mapping in Kent and Sussex counties, Delaware : Delaware Geological Survey Report of Investigations No. 66, 20 p.
2004, Haefner, R. J., and Andres, A. S., Serving ground water data on the Internet: Issues for the future: Groundwater, vol. 42, no. 3 p. 323-324.
2003, Ground-water recharge potential, Kent County, Delaware: Delaware Geological Survey Hydrologic Map No. 11, 1:100,000.
2003, Ground-water recharge potential, Sussex County , Delaware : Delaware Geological Survey Hydrologic Map No. 12, 1:110,000.
2003, Andres, A. S., Duffy, C. A., and Costas, E. M., Wellhead protection area delineations for the Lewes - Rehoboth Beach area, Delaware : Delaware Geological Survey Report of Investigations No. 65, 23 p.
2003, Digital ground-water recharge potential map data for Kent and Sussex counties, Delaware: Delaware Geological Survey Digital Product 02-01, ESRI E00 format. (with Howard, C. S., Keyser, T. A., and Wang, L. T.)
2002, Delaware Inland Bays tributary total maximum daily load water-quality database: Delaware Geological Survey Digital Product 02-02, MS Access 2000 database. (with Savidge, K., Scudlark, J. R., and Ullman W J.)
2002, Results of hydrogeologic studies of the Cypress Swamp Formation, Delaware: Delaware Geological Survey Report of Investigations No. 64, 18 p. (with Howard, C. S.)
2002, Ullman, W. J., Andres, A. S., Scudlark, J. R., and Savidge, K., Storm-water and base-flow sampling and analysis in the Delaware Inland Bays: preliminary report of findings 1998-2000: Delaware Geological Survey Open-File Report No. 44, 41 p.
2001, Geohydrolgy of the Smyrna-Clayton Area, Delaware: Delaware Geological Survey Hydrogeologic Map Series No. 10, 1:24,000, 2 sheets.
2001, Karr, J. D., Showers, W. J., Gilliam, J. W., and Andres, A. S., Tracing nitrate transport and environmental impact from intensive swine farming using delta-N-15: Journal of Environmental Quality, p. 1163-1175.
2000, The Cypress Swamp Formation, Delaware: Delaware Geological Survey Report of Investigations No. 62, 13 p. (with Howard, C.S.).
1999, Analysis of deformation features at the Pollack farm site: Delaware Geological Survey Special Publication No. 20 (with Howard, C. S.).
1998, Geochemical Heterogeneities Due to Artificial Drainage and Geologic Controls: Implications for Fate and Transport of Nitrogen and Phosphorus: Proceedings of the 1998 Association of Ground Water Scientists and Engineers Annual Meeting.
1996, Geology of the Seaford area, Delaware: Delaware Geological Survey Report of Investigations No. 53, 23 p. (with Ramsey, K. W.).
1995, Geology of the Seaford area, Delaware: Delaware Geological Survey Geologic Map No. 9,1:24,000 (with Ramsey, K. W.).
1995, Nitrate Loss Via Ground Water Flow, Coastal Sussex County, Delaware, in K. Steele, ed., Animal Waste and the Land-Water Interface: Boca Raton, FL, CRC Press, Inc., p. 69-75.
1994, Geohydrology of the Seaford area, Delaware: Delaware Geological Survey Hydrologic Map No. 9, 1:24,000.
1993, Nitrate contamination of ground and surface waters, coastal Sussex County, Delaware: Hydrological Science and Technology, (Additional Proceedings for the 1993 Joint USA/CIS Conference on Environmental Hydrology and Hydrogeology), vol. 9, no. 3.
1991, Results of the coastal Sussex County, Delaware, ground-water quality survey: Delaware Geological Survey Report of Investigations No. 49, 28 p.