On groundwater fluctuations, evapotranspiration, and understory removal in riparian corridors

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dc.contributor.author Martinet, Maceo en_US
dc.contributor.author Vironi, Enrique en_US
dc.contributor.author Cleverly, James en_US
dc.contributor.author Thibault, James en_US
dc.contributor.author Schuetz, Jennifer en_US
dc.contributor.author Dahm, Clifford en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:48:21Z
dc.date.available 2010-05-28T09:48:21Z
dc.date.issued 2009 en_US
dc.identifier 2008008752 en_US
dc.identifier.citation Martinet Maceo et al. 2009, 'On groundwater fluctuations, evapotranspiration, and understory removal in riparian corridors', American Geophysical Union, vol. 45, no. 5, pp. 1-19. en_US
dc.identifier.issn 0043-1397 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/9240
dc.description.abstract This study utilizes 7 years of continuously monitored groundwater-level data from four sites along the Rio Grande riparian corridor in central New Mexico to calculate evapotranspiration from groundwater and assess impacts of understory vegetation removal during a restoration project. Diurnal groundwater fluctuation measurements were used to compare the well-known White method for estimating evapotranspiration from groundwater (ETg) to colocated measurements of total riparian evapotranspiration (ET) measured using the eddy covariance method. On average, the two methods were linearly correlated and had similar variability, but groundwater hydrograph estimates of ETg tended to be larger than tower ET estimates. Average ETg estimates for two wells at one site ranged from 91.45% to 164.77% of measured tower ET estimates, but were also shown to range from 57.35% to 254.34% at another site. Comparisons between the methods improved with deeper water tables, reduced groundwater and river connectivity, and where soil profiles were dominated by coarse-sized particles. Using a range of texture-based estimates of specific yield (Sy) with water table position improves the field application of the White method. River-induced fluctuations in groundwater increased the variability of ETg measurements. Removal of understory vegetation at one site resulted in a small but significant reduction in diel groundwater fluctuation amplitude of 19?21%. Caution is required when understory vegetation removal is used as a means to decrease overall riparian ET. Diel groundwater fluctuation amplitudes can be useful in gauging the hydrological effects of vegetation removal. Riparian groundwater hydrographs are critical to investigating the hydrologic connectivity between river and shallow groundwater, the temporal patterns of vegetative consumption, and monitoring changes to the vegetation community. en_US
dc.language en_US
dc.publisher American Geophysical Union en_US
dc.title On groundwater fluctuations, evapotranspiration, and understory removal in riparian corridors en_US
dc.parent Water resources research en_US
dc.journal.volume 45 en_US
dc.publocation United States en_US
dc.identifier.startpage 1 en_US
dc.identifier.endpage 19 en_US
dc.cauo.name SCI.Plant Functional Biology & Climate Change en_US
dc.conference Verified OK en_US
dc.for 090700 en_US
dc.personcode 0000054074 en_US
dc.personcode 0000054075 en_US
dc.personcode 108525 en_US
dc.personcode 0000054064 en_US
dc.personcode 0000054076 en_US
dc.personcode 0000054063 en_US
dc.percentage 100 en_US
dc.classification.name Environmental Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords en_US
dc.staffid en_US


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