H43B-1492
COMPARING EVENT-BASED STORAGE ACROSS TROPICAL LAND-COVER GRADIENTS IN THE PANAMA CANAL WATERSHED

Thursday, 17 December 2015
Poster Hall (Moscone South)
Guy Litt, University of Wyoming, Laramie, WY, United States, Chris Gardner, Ohio State University, Columbus, OH, United States, Fred L Ogden, Univ. of Wyoming - Dept 3295, Laramie, WY, United States and William B Lyons, Ohio State University Main Campus, Columbus, OH, United States
Abstract:
Quantifying watershed storage is a difficult undertaking, yet serves as a critical state variable for understanding catchment runoff processes and modeling applications. Hydrograph recession rates have traditionally been used to characterize relative watershed storage characteristics, but may neglect the different flowpaths taken during recession periods. Separating event-based hydrograph recession into 'old' and 'new' water can help distinguish between different catchment storages (Stewart, 2015). By coupling geochemical tracer-based hydrograph separation with post-storm recession rates in humid tropical catchments (<185 ha), we test the hypothesis that both 'old' and 'new' water stores are greater in forested areas relative to disturbed land covers.

Stewart, M. K. (2015), Promising new baseflow separation and recession analysis methods applied to streamflow at Glendhu Catchment, New Zealand. Hydrol. Earth Syst. Sci., 19(6), 2587-2603.

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