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Scientific Investigations Map 3196

Prepared in cooperation with the New Hampshire Department of Safety, Division of Homeland Security and Emergency Management

Flood-Inundation Maps for the Suncook River in Epsom, Pembroke, Allenstown, and Chichester, New Hampshire

By Robert H. Flynn, Craig M. Johnston, and Laura Hayes

Thumbnail of and link to report PDF (3.1 MB)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/.

 

Map of Suncook River study area
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

For best performance, right-click and save map sheets to your computer and open with appropriate software.

For additional information contact:
Director, New Hampshire-Vermont Water Science Center
U.S. Geological Survey
331 Commerce Way
Pembroke, NH 03275
(603) 226-7800

http://nh.water.usgs.gov/

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.


Suggested citation:

Flynn, R.H., Johnston, C.M. and Hayes, Laura, 2012, Flood-inundation maps for the Suncook River in Epsom, Pembroke, Allenstown, and Chichester, New Hampshire: U.S. Geological Survey Scientific Investigations Map 3196, 10 p. pamphlet, 20 sheets, scale 1:24,000.



Contents (Pamphlet)

Acknowledgments

Abstract

Introduction

Purpose and Scope

Study Area Description

Previous Studies

Constructing Water-Surface Profiles

Hydrologic and Steady-Flow Data

Topographic/Bathymetric Data

Energy Loss Factors

Model Calibration and Performance

Development of Water-Surface Profiles

Inundation Mapping

Availability of Suncook River, New Hampshire, Flood-Inundation Maps

Disclaimer for Flood-Inundation Maps

Uncertainty Associated with Inundation Maps

Summary

References Cited

Accessibility FOIA Privacy Policies and Notices

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