Aquatic Sciences Meeting, Albuquerque 2001

SS31 Integrated Approaches to Drainage Basin Nutrient Inputs and Inland/Coastal Eutrophication (Science and Society Connections)

Date: Thursday, February 15, 2001, Time: 11:45:00 AM

Location: Cimarron

Vallino, J, J, Marine Biological Laboratory, Woods Hole, USA, jvallino@mbl.edu

Hopkinson, C, S, Marine Biological Laboratory, Woods Hole, USA, chopkins@mbl.edu

Rastetter, E, , Marine Biological Laboratory, Woods Hole, USA, erastett@mbl.edu

Williams, M, , Marine Biological Laboratory, Woods Hole, USA, mikewilliams@mbl.edu

Claessens, L, , Marine Biological Laboratory, Woods Hole, USA,

Pontius, R, G, Clark University , Worcester , USA, rpontius@clarku.edu

MODEL EVALUATION OF LAND-USE TRANSFORMATIONS ON NUTRIENT DYNAMICS IN THE IPSWICH RIVER, MA

As part of the EPA/NSF Water and Watersheds Program, we are examining the effects of land-use change on nutrient chemistry in the Ipswich River Watershed, MA. We have combined observations of stream nutrient chemistry at both the basin and small catchment scales with a basin scale watershed model (USGS Hydrologic Simulation Package Fortran: HSPF) to examine the effects of land use change on inorganic nitrogen transport to the coastal zone. Nutrient chemistry of streams draining small catchments of varying land use were used to calibrate upland components of HSPF, while stream transects along the main stem of the Ipswich River allowed calibration of in-stream processes. The calibrated HSPF model has been combined with a GIS-based model that predicts likely future land-use changes based on social-economic trends. The combination of these models allows us to examine possible changes in river chemistry that may result from future land-use changes in the Ipswich watershed.

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Aquatic Sciences Meeting, Albuquerque 2001

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