Link back to NH/Vt home page  
New Hampshire-Vermont Water Science Center

Map showing stream gages in New Hampshire coded by recurrence intervals in April 2007 flooding

Recurrence intervals (or return intervals) are used by hydrologists to describe the magnitude and frequency of floods and represent the average interval of time over which floods of similar magnitudes are expected to occur. In the map below, hovering over any colored triangle reveals discharge (in cubic feet per second) at that gage during the flooding and the gage's station name, location, and number. All are operated by the USGS and linked to the real-time data collected continuously.

Map of USGS Stream-gaging stations; Colored triangles show gages on flooded rivers in April 2007 and are linked to real-time data

 

back arrow Return to Archived News Page

 

2,770 CFS on Apr 17 -- Smith R., Bristol, NH, Station 01078000 3,550 CFS on Apr 17 -- Winnipesaukee R., Tilton, NH, Station 01081000 6,910 CFS on Apr 17 -- Warner R., Davisville, NH, Station 01086000 3,730 CFS on Apr 17 -- Soucook River, at Pembroke Road, near Concord, NH, Station 01089100 6,500 CFS on Apr 17 -- Cocheco River near Rochester, NH, Station 01072800 1,300 CFS on Apr 17, Oyster R., Durham, NH, Station 01073000 8,450 CFS on Apr 18 -- Lamprey R., Newmarket, NH, Station 01073500 2,840 CFS on Apr 17 -- Exeter R., Brentwood, NH, Station 01073587 12,900 CFS on Apr 17 -- Contoocook R., Henniker, NH, Station 01085000 11,500 CFS on Apr 16 -- Piscataquog R., Goffstown, NH, Station 01091500 59,700 CFS on Apr 17 -- Merrimack R., Manchester, NH, Station 01092000 10,600 CFS on Apr 17 -- Souhegan R., Merrimack, NH, Station 01094000 1,900 CFS on Apr 16 -- Beaver Brk., North Pelham, NH, Station 010965852 1,120 CFS on Apr 18 -- Spicket R., near Methuen, MA, Station 01100561 418 CFS -- Spicket River, N. Salem, NH, Station 01100505 17,300 CFS on Apr 17 -- Merrimack R., Franklin Jnct, NH, Station 01081500 1,030 CFS on Apr 16 -- Winnicut R. at Greenland, nr Portsmouth, NH, Station 01073785 6,400 CFS on Apr 17 -- Isinglass R., near Dover NH, Station 01072870 4,150 CFS on Apr 16 -- Contoocook R. at Peterborough, NH, Station 01082000