New Hampshire
StreamStats for New Hampshire can be used to estimate the long-term flood discharges at recurrence intervals of 2-, 5-, 10-, 25-, 50-, 100-, and 500-years for ungaged, unregulated, rural streams. The report below presents the equations used to estimate the flow statistics, describes the errors associated with the estimates, and describes the methods used to develop the equations and to measure the basin characteristics used in the equations. Users should familiarize themselves with the report before using StreamStats to obtain estimates of streamflow statistics for ungaged sites.
The above report describes a technique for estimating flood discharges at selected recurrence intervals for an ungaged site upstream or downstream from a streamgage using a drainage-area adjustment that is not implemented in StreamStats. Interested users should refer to the report for information on use of the method. StreamStats includes a different method for making such adjustments.
StreamStats reports the uncertainty of the estimates for ungaged basins with drainage areas between 0.70 and 1,290 mi2; mean April precipitation between 2.79 and 6.23 inches, percentages of wetlands between zero and 21.8, and main channel slopes between 5.43 and 543 feet per mile. Errors for basins with basin characteristics that are beyond these bounds are unknown.
Interactive Map
StreamStats for New Hampshire was developed in cooperation with the New Hampshire Department of Transportation.
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