Articles | Volume 20, issue 11
https://doi.org/10.5194/hess-20-4439-2016
https://doi.org/10.5194/hess-20-4439-2016
Research article
 | 
03 Nov 2016
Research article |  | 03 Nov 2016

Solar-forced diurnal regulation of cave drip rates via phreatophyte evapotranspiration

Katie Coleborn, Gabriel C. Rau, Mark O. Cuthbert, Andy Baker, and Owen Navarre

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Cited articles

Acworth, R. I., Rau, G. C., McCallum, A. M., Andersen, M. S., and Cuthbert, M. O.: Understanding connected surface-water/groundwater systems using Fourier analysis of daily and sub-daily head fluctuations, Hydrogeol. J., 23, 143–159, https://doi.org/10.1007/s10040-014-1182-5, 2015.
Adamson, L. and Loudon, A.: Wagga Geological Sheet, 1 : 250 000, SI/55-15, 1st Edn., Geological Survey of New South Wales, Sydney, 1966.
Allocca, V., Manna, F., and De Vita, P.: Estimating annual groundwater recharge coefficient for karst aquifers of the southern Apennines (Italy), Hydrol. Earth Syst. Sci., 18, 803–817, https://doi.org/10.5194/hess-18-803-2014, 2014.
Andreo, B., Vias, J., Duran, J. J., and Jimenez, P.: Methodology for groundwater recharge assessment in carbonate aquifers: application to pilot sites in southern Spain, Hydrogeol. J., 16, 911–925, 2006.
Arbel, Y., Greenbaum, N., Lange, J., and Inbar, M.: Infiltration processes and flow rates in developed karst vadose zone using tracers in cave drips, Earth Surf. Proc. Land., 35, 1682–1693, https://doi.org/10.1002/esp.2010, 2010.
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This is the first observation of tree water use in cave drip water. Our novel time series analysis using the synchrosqueeze transform identified daily and sub-daily oscillations in drip rate. The only hypothesis consistent with hydrologic theory and the data was that the oscillations were caused by solar driven pumping by trees above the cave. We propose a new protocol for inferring karst architecture and our findings support research on the impact trees on speleothem paleoclimate proxies.