Development of Streamflow Record Extension Equations in New Hampshire Completed
Currently, there are 16 designated rivers in New Hampshire in need of daily mean streamflow estimates for managing instream flows. Many of New Hampshire’s Designated Rivers have current and/or historical streamflow data that may be used to extend an existing streamgages streamflow record in time through record extension techniques. Evaluating the feasibility of record extension techniques to provide the streamflow data necessary to manage New Hampshire’s designated rivers would provide valuable insight for optimizing the development of a cost-effective streamgaging network.
This investigation will evaluate record extension techniques at six previously gaged locations on designated rivers by relating previously published field measurements of discharge at discontinued stations to daily discharges at some nearby active streamgage.
Objectives:
- Record extension techniques equations for estimates of daily mean streamflow for six discontinued streamgages. This would include upper and lower confidence intervals for daily mean streamflow.
- Assessment of error in the extended streamflow record developed for the six previously gaged locations on designated rivers.
Development and evaluation of a record extension technique for estimating discharge at selected stream sites in New Hampshire
Estimation of Flood Discharges at Selected Recurrence Intervals for Streams in New Hampshire
- Overview
Currently, there are 16 designated rivers in New Hampshire in need of daily mean streamflow estimates for managing instream flows. Many of New Hampshire’s Designated Rivers have current and/or historical streamflow data that may be used to extend an existing streamgages streamflow record in time through record extension techniques. Evaluating the feasibility of record extension techniques to provide the streamflow data necessary to manage New Hampshire’s designated rivers would provide valuable insight for optimizing the development of a cost-effective streamgaging network.
This investigation will evaluate record extension techniques at six previously gaged locations on designated rivers by relating previously published field measurements of discharge at discontinued stations to daily discharges at some nearby active streamgage.
Objectives:
- Record extension techniques equations for estimates of daily mean streamflow for six discontinued streamgages. This would include upper and lower confidence intervals for daily mean streamflow.
- Assessment of error in the extended streamflow record developed for the six previously gaged locations on designated rivers.
- Publications
Development and evaluation of a record extension technique for estimating discharge at selected stream sites in New Hampshire
Daily mean discharges are needed for rivers in New Hampshire for the management of instream flows. It is impractical, however, to continuously gage all streams in New Hampshire, and at many sites where information is needed, the discharge data required do not exist. For such sites, techniques for estimating discharge are available. The U.S. Geological Survey, in cooperation with the New HampshireAuthorsScott A. Olson, Abraham J. MeyerhoferEstimation of Flood Discharges at Selected Recurrence Intervals for Streams in New Hampshire
This report provides estimates of flood discharges at selected recurrence intervals for streamgages in and adjacent to New Hampshire and equations for estimating flood discharges at recurrence intervals of 2-, 5-, 10-, 25-, 50-, 100-, and 500-years for ungaged, unregulated, rural streams in New Hampshire. The equations were developed using generalized least-squares regression. Flood-frequency andAuthorsScott A. Olson