PREP Focus Area
In December 2007, the PREP management committee agreed to expand the PREP’s area of focus to include the entire Great Bay Estuary watershed, which includes 24 percent of the watershed in Maine. PREP now works in 42 communities in New Hampshire and 10 communities in Maine. d
General Maps
New Hampshire's coastal watershed includes 10 sub-watersheds and two major estuarine systems: Great Bay and Hampton-Seabrook Harbor. The following maps illustrate these systems and include major roadways and geographic features to help orient visitors to the Seacoast.
Coastal WatershedCoastal Watershed Towns
Sub-watersheds
Great Bay
Hampton-Seabrook Harbor
Customized maps for each town listed below display 1990, 2000, and 2005 impervious surfaces, conservation lands identified in the Land Conservation Plan for New Hampshire’s Coastal Watersheds and the Land Conservation Plan for Maine’s Piscataqua Region Watersheds, roads, surface waters, and impervious surface summary statistics. UNH Complex Systems Research Center developed impervious surface estimates for communities in the Piscataqua Region watershed (see the 2006 Final Report for the results for NH towns and the 2008 Final Report for the results for Maine towns). The same technology was used to map the impervious surfaces in 1990, 2000, and 2005; therefore these maps show trends in impervious surface over a 15-year time span. The base GIS datalayers are available from NH GRANIT and MEGIS. For more information on the maps contact Phil Trowbridge.
Buffer Characterization Maps
The Complex Systems Research Center (CSRC) at the University of New Hampshire conducted a characterization of the buffers around 2nd order and higher streams within the Piscataqua/Coastal Basin of New Hampshire. GIS and remote sensing data archived in the NH GRANIT database were used to map land use, impervious surface coverage, and transportation infrastructure within standard buffers around each stream segment. These factors were then analyzed to produce a categorical indicator representing the status of each stream. The results are presented on community-based maps displaying stream characterizations and the corresponding acreage tables. In addition, the data have been made available as digital data layers archived in the GRANIT database.
To access digital data layers go to GRANIT. To receive a hard copy of your towns map please contact Dave Kellam.
