National Science Foundation
08/01/2009 – 07/31/2012
Graham, Wendy D
Cohen, Matthew J
Delfino, Joseph J
Martin, Jonathan B
Slatton, Kenneth C
Goals and Objectives
This funding explores the biotic and hydrology controls over riverine elemental cycles, focusing of N (of particular relevance because of high levels of N enrichment in the regional groundwater system) and Ca (relevant because the mechanisms of spring-river channel formation are unknown. In addition to developing detailed elemental budgets for these elements under different hydrologic regimes, we have leveraged this money to examine more closely the link between discharge and water age in an effort to better reconcile the links between discharge concentrations of key contaminants and the reported extremely long lags (ca. 30 years) between recharge in the springshed and discharge at the spring vent. This work is in collaboration with Florida International University.
Title: Characterization of groundwater and surface water mixing in a semi-confined karst aquifer using time lapse electrical resistivity tomography. Water Resources Research, DOI: 10.1002/2013WR013991, 2014.
Authors: Meyerhoff, S, R. Maxwell, A. Revil, J. Martin, M. Karaoulis, and W. Graham
Title: A particle-tracking scheme for simulating pathlines in coupled surface-subsurface flows, Advances in Water Resources, Volume 52, Pages 7–18, 2013.
Authors: de Rooij, R., Graham, W., Maxwell, R.M.
Title: A Scalable Approach to Fusing Spatio-Temporal Data to Estimate Streamflow via a Bayesian Network, IEEE Transactions on Geoscience and Remote Sensing, Vol PP, Issue 99, doi:10.1109/TGRS.2010.2049115, 2010.
Authors: Nagarajan K., C. Krekeler, K. C. Slatton, and W. D. Graham
Title: Effects of Antecedent Hydrogeologic Conditions on Flood Magnitude and Recharge to the Floridan Aquifer in North-Central Florida, 2012.
Authors: Ball, C. and J.B. Martin
Title: From rainfall to spring discharge: Coupling conduit flow, subsurface matrix flow and surface flow in karst systems with a discrete-continuum model, Advances in Water Resources,Volume 61, Pages 29-41, 2013.
Authors: de Rooij, R., P. Perrochet, and W. Graham
Title: Influence of diel biogeochemical cycles on carbonate equilibrium in a karst river. Chemical Geology, 2011.
Authors: De Montety, V., J.B. Martin, M.J. Cohen, M.J. Kurz and C.R. Foster
Title: Insights on geologic and vegetative controls over hydrologic behavior of a large complex basin – Global Sensitivity Analysis of an integrated parallel hydrologic model, 2014.
Authors: Srivastava, V., W. Graham, R. Munoz-Carpena, and R. Maxwell
Title: Time variant cross-correlation to assess residence time of water, implication for hydraulics of a sink/rise karst system, Water Resources Research, 2011.
Authors: Bailly-Comte, V., et al.
Title: Visualization of conduit-matrix conductivity differences in a karst aquifer using time-lapse electrical resistivity, GEOPHYSICAL RESEARCH LETTERS, VOL. 39, L24401, doi:10.1029/2012GL053933, 2012
Authors: Meyerhoff, Steven B., Marios Karaoulis, Florian Fiebig, Reed M. Maxwell, Andre Revil, Jonathan B. Martin, and Wendy D. Graham