Physics – Geophysics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30f..47c&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 6, pp. 47-1, CiteID 1314, DOI 10.1029/2002GL016808
Physics
Geophysics
1
Hydrology: Groundwater Hydrology, Hydrology: Runoff And Streamflow, Hydrology: Floods, Mathematical Geophysics: Modeling
Scientific paper
We show how diffusive fluxes based on Darcy's law define groundwater hydrographs following sharp perturbations on the hydraulic head. The derived normalized hydrograph is based on a single fitting parameter, the time constant ``b'', and has great semblance to observed discharge hydrographs for many karst springs and small rivers following rainfall events. Observed time constants increase with basin area but at a given site decrease as peak flows increase. The predicted interval between a pulse in head and the resultant peak flow is equal to 2b/3. Longer delays are observed between actual rainfall events and peak flows because the head perturbation must postdate the rainfall.
Criss Robert E.
Winston W. E.
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