| Estimators of low streamflow statistics are often required for water quality and quantity management. This study examines baseflow correlation, an information transfer technique, as a method for estimating low streamflow statistics at ungauged sites. Baseflow correlation estimates streamflow statistics at the ungauged site by correlating streamflow discharges during baseflow conditions with those at a gauged site. A jackknife simulation is performed in each of the 18 USGS water resource regions located within the continental United States. Potential gauged sites are selected using a variety of classification systems. The results of this study indicate that baseflow correlation performs best in the northeastern and northwestern United States, when the ungauged site baseflow segment is comprised of nearly independent days, and potential gauged sites are located within 100 km. A comparison of baseflow correlation with regional regression shows that baseflow correlation is the preferred method for estimating low flows in humid regions. |
