A field investigation of phreatophyte-induced fluctuations in the water table
Article first published online: 7 FEB 2007
Copyright 2007 by the American Geophysical Union.
Water Resources Research
Volume 43, Issue 2, February 2007
How to Cite
2007), A field investigation of phreatophyte-induced fluctuations in the water table, Water Resour. Res., 43, W02404, doi:10.1029/2005WR004627., , , , , , and (
- Issue published online: 7 FEB 2007
- Article first published online: 7 FEB 2007
- Manuscript Accepted: 12 SEP 2006
- Manuscript Revised: 25 MAY 2006
- Manuscript Received: 30 SEP 2005
- water table fluctuations
 Hydrographs from shallow wells in vegetated riparian zones frequently display a distinctive pattern of diurnal water table fluctuations produced by variations in plant water use. A multisite investigation assessed the major controls on these fluctuations and the ecohydrologic insights that can be gleaned from them. Spatial and temporal variations in the amplitude of the fluctuations are primarily a function of variations in (1) the meteorological drivers of plant water use, (2) vegetation density, type, and vitality, and (3) the specific yield of sediments in the vicinity of the water table. Past hydrologic conditions experienced by the riparian zone vegetation, either in previous years or earlier within the same growing season, are also an important control. Diurnal water table fluctuations can be considered a diagnostic indicator of groundwater consumption by phreatophytes at most sites, so the information embedded within these fluctuations should be more widely exploited in ecohydrologic studies.