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dc.contributor.authorTran, Hoang
dc.contributor.authorZhang, Jun
dc.contributor.authorCohard, Jean-Martial
dc.contributor.authorCondon, Laura E
dc.contributor.authorMaxwell, Reed M
dc.date.accessioned2020-05-05T19:30:45Z
dc.date.available2020-05-05T19:30:45Z
dc.date.issued2020-04-03
dc.identifier.citationTran, H., Zhang, J., Cohard, J.‐M., Condon, L.E. and Maxwell, R.M. (2020), Simulating Groundwater‐Streamflow Connections in the Upper Colorado River Basin. Groundwater, 58: 392-405. doi:10.1111/gwat.13000en_US
dc.identifier.issn0017-467X
dc.identifier.pmid32181894
dc.identifier.doi10.1111/gwat.13000
dc.identifier.urihttp://hdl.handle.net/10150/641169
dc.description.abstractIn mountain, snow driven catchments, snowmelt is supposed to be the primary contribution to river streamflows during spring. In these catchments the contribution of groundwater is not well documented because of the difficulty to monitor groundwater in such complex environment with deep aquifers. In this study we use an integrated hydrologic model to conduct numerical experiments that help quantify the effect of lateral groundwater flow on total annual and peak streamflow in predevelopment conditions. Our simulations focus on the Upper Colorado River Basin (UCRB; 2.8 × 105  km2 ) a well-documented mountain catchment for which both streamflow and water table measurements are available for several important sub-basins. For the simulated water year, our results suggest an increase in peak flow of up to 57% when lateral groundwater flow processes are included-an unexpected result for flood conditions generally assumed independent of groundwater. Additionally, inclusion of lateral groundwater flow moderately improved the model match to observations. The correlation coefficient for mean annual flows improved from 0.84 for the no lateral groundwater flow simulation to 0.98 for the lateral groundwater flow one. Spatially we see more pronounced differences between lateral and no lateral groundwater flow cases in areas of the domain with steeper topography. We also found distinct differences in the magnitude and spatial distribution of streamflow changes with and without lateral groundwater flow between Upper Colorado River Sub-basins. A sensitivity test that scaled hydraulic conductivity over two orders of magnitude was conducted for the lateral groundwater flow simulations. These results show that the impact of lateral groundwater flow is as large or larger than an order of magnitude change in hydraulic conductivity. While our results focus on the UCRB, we feel that these simulations have relevance to other headwaters systems worldwide.en_US
dc.language.isoenen_US
dc.publisherWILEYen_US
dc.rights© 2020, National Ground Water Association.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleSimulating Groundwater-Streamflow Connections in the Upper Colorado River Basinen_US
dc.typeArticleen_US
dc.identifier.eissn1745-6584
dc.contributor.departmentUniv Arizona, Dept Hydrol & Atmospher Scien_US
dc.identifier.journalGROUNDWATERen_US
dc.description.note12 month embargo; published online: 17 March 2020en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.journaltitleGround water
dc.source.volume58
dc.source.issue3
dc.source.beginpage392
dc.source.endpage405
dc.source.countryUnited States


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