Lowe, W. University of Delaware,
THE EFFECTS OF STRONG EL NINOS AND LA NINAS ON RIVERFLOW IN THE DELAWARE RIVER BASIN
The association between strong El Nino/La Nina events and stream flow in the Delaware River Basin is investigated as an indicator of the effects of these events on precipitation in the Basin. Flow for the Schuylkill and Delaware Rivers was averaged on a monthly basis and examined during the six strongest El Ninos and six strongest La Ninas on record as indicated by NOAA's Multivariate ENSO Index. Dry conditions in both rivers during El Ninos and La Ninas seem to indicate less precipitation in the Basin during major ENSO events. Significantly-skewed distributions show that August,
September, and October are associated with low flow during strong El Ninos in the Delaware River and that September and October show similar relationships in the Schuylkill River. La Nina is associated with lower
than average streamflow conditions lasting throughout the event but lacks consistent monthly patterns; at least 70% of the months considered for each station during La Nina were in the drier one-third of the distribution. It is possible that future work may lead to results which are of possible value as predictors of La Nina and its effect; these data would be useful to regional water-use managers.
Day: Wednesday, Feb. 3
Location: Sweeney Center