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

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dc.contributor.author Martinet, MC
dc.contributor.author Vivoni, ER
dc.contributor.author Cleverly, JR
dc.contributor.author Thibault, JR
dc.contributor.author Schuetz, JF
dc.contributor.author Dahm, CN
dc.date.accessioned 2010-05-28T09:48:21Z
dc.date.issued 2009-05
dc.identifier.citation Water Resources Research, 2009, 45 (5)
dc.identifier.issn 0043-1397
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 Río 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 ET g 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. Copyright 2009 by the American Geophysical Union.
dc.language eng
dc.relation.isbasedon 10.1029/2008WR007152
dc.title On groundwater fluctuations, evapotranspiration, and understory removal in riparian corridors
dc.type Journal Article
dc.parent Water Resources Research
dc.journal.volume 5
dc.journal.volume 45
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 0907 Environmental Engineering
dc.personcode 108525
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
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Open Access
utslib.copyright.date 2015-04-15 12:23:47.074767+10
pubs.consider-herdc false
utslib.collection.history General (ID: 2)
utslib.collection.history School of the Environment (ID: 344)

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