Arnold, C.L. and Gibbons, C.J. 1996. Impervious surface coverage: the emergence of a key environmental indicator. J Am Planning Assoc 62: 243–258.
Ator, S.W. and Ferrari, M.J. 1997. Nitrate and selected pesticides in ground water of the Mid-Atlantic Region. US Geol. Surv.Water-Resources Invest. Report 97-4139, Baltimore, Maryland, USA.
Behrendt, H., Ley, M., Korol, R., Stronska-Kedzia, M. and Pagenkopf, W. 1999. Point and diffuse nutrient emissions and transports in the Odra Basin and its main tributaries. Acta Hydrobiol Hydrochim 27: 274–281.
Burns, J.W. 1972. Some effects of logging and associated road construction on Northern Californian streams. Trans Am Fish Soc 101: 1–17.
Charbonneau, R and Kondolf, G.M. 1993. Land use change in California, USA: nonpoint source water quality impacts. Environ Man 17: 453–460.
Clarke, S.E., White, D. and Schaedel, A.L. 1991. Oregon, USA, ecological regions and subregions for water quality management. Environ Man 15: 847–856.
Cooper, J.R., Gilliam, J.W., Daniels, R.D. and Robarge, W.P. 1987. Riparian areas as filters for agricultural sediment. Soil Sci Soc Am J 51: 416–420.
de Whit, M. and Behrendt, H. 1999. Nitrogen and phosphorus loss from soil to surface water in the Rhine and Elbe Basin. Wat Sci Tech 39: 109–116.
EPA. 1988. Future risk: research strategies for the 1990's. EPA Science Advisory Board, Washington, D.C., USA.
EPA. 1998. Office of Research and Development: Ecological research strategy. EPA/600/R-98/086, Washington, D.C., USA.
ESRI. 1996. Introduction to ArcView GIS. Environmental Systems Research Institute, Redlands, California, USA.
Franklin, J.F. 1992. Scientific basis for new perspectives in forests and streams. pp. 2572. In Watershed Management. Edited by Naiman, R.J. Springer-Verlag, New York, NY, USA.
Harden, C.P. 1992. Incorporating roads and footpaths in watershedscale hydrologic and soil erosion models. Phys Geogr 13: 368–385.
Hem, J.D. 1985. Study and interpretation of the chemical characteristics of natural water. US Geological Survey Water-Supply Paper 2254, Washington, DC, USA. 264 pp.
Herlihy, A.T., Stoddard, J.L. and Johnson, C.B. 1998. The relationship between stream chemistry and watershed land cover data in the Mid-Atlantic Region of the U.S.Water, Air, Soil Pollut. 105: 377–386.
Hunsaker, C.T. and Levine, D.A. 1995. Hierarchical approaches to the study of water quality in rivers. BioScience 45: 193–203.
Hunsaker, C.T., Levine, D.A., Timmins, S.P., Jackson, B.L. and O'Neill, R.V. 1992. Landscape characterization for assessing regional water quality. pp. 997–1006. In Ecological Indicators Edited by McKenzie, D.H., Hyatt, D.E. and McDonald, V.J. Elsevier Appl. Sci., New York, NY, USA.
Jones, K.B., Riitters, K.H., Wickham, J.D., Tankersley, R.D., O'Neill, R.V., Chaloud, D.J, Smith, E.R. and Neale, A.C. 1997. An ecological assessment of the United States mid-Atlantic Region: a landscape atlas EPA/600/R-97/130, Washington, D.C., USA.
Karr, J.R. and Schlosser, I.J. 1978. Water resources and the landwater interface. Science 201: 229–233.
Langland, M.J., Edwards, R.E. and Darrell, L.C., 1998. Status yields and trends of nutrient and sediment data and methods of analysis for the nontidal data-collection programs, Chesapeake Bay drainage basin: 1985-96. U.S. Geological Survey/OFR 98-17, Baltimore, Maryland, USA.
Likens, G.E., Bormann, F.H., Pierce, R.S., Eaton, J.S. and Johnson, N.M. 1977. Biogeochemistry of a Forested Ecosystem. Springer-Verlag, New York, NY, USA.
Lowrance, R.R., Leonard, R. and Sheridan, J. 1984. Managing riparian ecosystems to control nonpoint pollution. J Soil Water Cons 40: 87–91.
Neter, J., Kutner, M.H., Nachtsheim, C.J. and Wasserman, W. 1996. Applied Linear Regression Models. Fourth Edition, McGraw-Hill, Boston, Massachusetts, USA.
Omernik, J.M. 1987. Ecoregions of the United States: Map at a scale of 1:7,500,000,000. Suppl Annals Am Assoc Geogr 77: 118–125.
Omernik, J.M., Abernathy, A.R. and Male, L.M. 1981. Stream nutrient levels and proximity of agricultural and forest land to streams: some relationships. J Soil Water Cons 36: 227–231.
O'Neill, R.V., Hunsaker, C.T., Jones, K.B., Riitters, K.H., Wickham, J.D., Schwarz, P., Goodman, I.A., Jackson, B. and Baillargeon, W.S. 1997. Monitoring environmental quality at the landscape scale. BioScience 47: 513–520.
Peterjohn, W.T. and Correl, D.L 1984. Nutrient dynamics in an agricultural watershed: observations on the role of a riparian forest. Ecology 65: 1466–1475.
Rapport, D.J., Caudet, C., Karr, J.R., Baron, J.S., Bohlen, C., Jackson, W., Jones, B., Naiman, R.J., Norton, B. and Pollock, M.M. 1998. Evaluating landscape health: integrating societal goals and biophysical process. J Environ Manag 53: 1–15.
Roth, N.E., Allan, J.D. and Erickson, D.L. 1996. Landscape influences on stream biotic integrity assessed at multiple scales. Land Ecol 11: 141–156.
SAS. 1990. SAS/SAT User´s Guide, Version 6, Fourth Edition, Vol. 2, SAS Institute Inc., Cary, North Carolina, USA.
Smith, R.A., Schwarz, G.E. and Alexander, R.B. 1997. Regional interpretation of water-quality monitoring data. Water Res Res 33: 2781–2798.
Stensland, G.L., Whelpdale, D.M. and Ochlert, G. 1986. Precipitation chemistry. pp. 128–199. In Acid Deposition: Long-Term Trends. Natl. Res. Counc., Natl. Acad. Press, Washington, D.C., USA.
Vogelmann, J.E., Sohl, T., Campbell, P.V. and Shaw, D.M. 1998. Regional land cover characterization using Landsat Thematic Mapper data and ancillary sources. Environ Mon Assess 51: 415–428.
Walker, J., Bullen, F. and Williams, B.G. 1993. Ecohydrological changes in the Murray—Darling Basin. I. The number of trees cleared over two centuries. J Appl Ecol 30: 265–273.
Weller, M.C., Watzin, M.C. and Wang, D. 1996. Role of wetlands in reducing phosphorus loading to surface water in eight watersheds in the Lake Champlain Basin. Environ Manag 20: 731–739.
Wickham, J.D., Jones, K.B., Riitters, K.H., O'Neill, R.V., Tankersley, R.D., Smith, E.R., Neale, A.C. and Chaloud, D.J. 1999. An integrated environmental assessment of the US Mid-Atlantic Region. Environ Manag 24: 553–560.
Wischmeier, W.H. and Smith, D.D. 1978. Predicting rainfall erosion loss: A guide to conservation planning. Agricultural handbook 537. U.S. Department of Agriculture, Washington, D.C., USA.
Yates, P. and Sheridan, J.M. 1983. Estimating the effectiveness of vegetated floodplains/wetlands as nitrate-nitrite and orthophosphorus filters. Agric Ecosys Environ 9: 303–314.
Zhu, Z., Yang, L., Stehman, S. and Czaplewski, R. 2000. Accuracy assessment of U.S. Geological Survey regional land cover mapping program: New York and New Jersey. Photo Eng Rem Sens, 66: 1425–1435.