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- McGuire, K.J.; DeWalle, D.R.; Gburek, W.J.
- Journal of hydrology 2002 v.261 no.1/4 pp. 132
- water balance, etc ; groundwater flow; Show all 2 Subject
- ... Seasonal variations of the stable isotope, oxygen-18 (18O), were used to estimate mean residence times (MRTs) of water in two Valley and Ridge Province watersheds in central Pennsylvania. MRT was estimated by applying 18O input precipitation signatures to response function models that describe flow conditions in the subsurface system. Precipitation 18O is usually seasonally periodic; however, duri ...