Abstract

Digital flood-inundation maps for a 16.5-mile reach of the Suncook River in Epsom, Pembroke, Allenstown, and Chichester, N.H., from the confluence with the Merrimack River to U.S. Geological Survey (USGS) Suncook River streamgage 01089500 at Depot Road in North Chichester, N.H., were created by the USGS in cooperation with the New Hampshire Department of Safety, Division of Homeland Security and Emergency Management. The inundation maps presented in this report depict estimates of the areal extent and depth of flooding corresponding to selected water levels (stages) at the USGS streamgage at Suncook River at North Chichester, N.H. (station 01089500). The current conditions at the USGS streamgage may be obtained on the Internet (http://waterdata.usgs.gov/nh/nwis/uv/?site_no=01089500&PARAmeter_cd=00065,00060). The National Weather Service forecasts flood hydrographs at many places that are often collocated with USGS streamgages. Forecasted peak-stage information is available on the Internet at the National Weather Service (NWS) Advanced Hydrologic Prediction Service (AHPS) flood-warning system site (http://water.weather.gov/ahps/) and may be used in conjunction with the maps developed in this study to show predicted areas of flood inundation.

These maps along with real-time stream stage data from the USGS Suncook River streamgage (station 01089500) and forecasted stream stage from the NWS will provide emergency management personnel and residents with information that is critical for flood-response activities, such as evacuations, road closures, disaster declarations, and post-flood recovery. The maps, along with current stream-stage data from the USGS Suncook River streamgage and forecasted stream-stage data from the NWS, can be accessed at the USGS Flood Inundation Mapping Science Web site http://water.usgs.gov/osw/flood_inundation/.

 

Flood-inundation maps of the Suncook River in Chichester, Epsom, Pembroke, and Allenstown, New Hampshire at Suncook River at North Chichester, New Hampshire (Station 01089500)
Stream stage	Northern region map	Southern region map
7 feet	Map sheet 1 PDF (25.3 MB)	Map sheet 2 PDF (25.2 MB)
9 feet	Map sheet 3 PDF (25.2 MB)	Map sheet 4 PDF (25.1 MB)
11 feet	Map sheet 5 PDF (25 MB)	Map sheet 6 PDF (25 MB)
12 feet	Map sheet 7 PDF (24.9 MB)	Map sheet 8 PDF (25 MB)
13 feet	Map sheet 9 PDF (25 MB)	Map sheet 10 PDF (24.9 MB)
14 feet	Map sheet 11 PDF (24.8 MB)	Map sheet 12 PDF (24.9 MB)
15 feet	Map sheet 13 PDF (24.7 MB)	Map sheet 14 PDF (24.8 MB)
16 feet	Map sheet 15 PDF (24.7 MB)	Map sheet 16 PDF (24.8 MB)
17 feet	Map sheet 17 PDF (24.6 MB)	Map sheet 18 PDF (24.7 MB)
18 feet	Map sheet 19 PDF (24.5 MB)	Map sheet 20 PDF (24.7 MB)

Revised February 29, 2012

First posted February 17, 2012