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dc.contributor.authorHoylman, Zachary H.
dc.contributor.authorJencso, Kelsey G.
dc.contributor.authorHu, Jia
dc.contributor.authorHolden, Zachary A.
dc.contributor.authorMartin, Justin T.
dc.contributor.authorGardner, W. Payton
dc.date.accessioned2019-08-13T22:50:13Z
dc.date.available2019-08-13T22:50:13Z
dc.date.issued2019-03-25
dc.identifier.citationHoylman, Z. H., Jencso, K. G., Hu, J., Holden, Z. A., Martin, J. T., & Gardner, W. P. ( 2019). The climatic water balance and topography control spatial patterns of atmospheric demand, soil moisture, and shallow subsurface flow. Water Resources Research, 55, 2370– 2389. https://doi.org/10.1029/2018WR023302en_US
dc.identifier.issn0043-1397
dc.identifier.doi10.1029/2018wr023302
dc.identifier.urihttp://hdl.handle.net/10150/633823
dc.description.abstractCatchment hydrometeorology and the organization of shallow subsurface flow are key drivers of active contributing areas and streamflow generation. However, understanding how the climatic water balance and complex topography contribute to these processes from hillslope to catchment scales remains difficult. We compared time series of vapor pressure deficits and soil moisture to the climatic water balance and topographic variables across six zero-order catchments in the Lubrecht Experimental Forest (Montana, USA). We then evaluated how local hydrometeorology (volumetric water content and atmospheric vapor pressure deficit) affected the spatial occurrence of shallow subsurface flow. Generalized linear mixed model analysis revealed significant, temporally stable (monthly and seasonal average) patterns of hydrometeorology that can be predicted by the topographic wetness index and the dynamic climatic water deficit (CWD = potential evapotranspiration - actual evapotranspiration). Intracatchment patterns were significantly correlated to the topographic wetness index, while intercatchment patterns were correlated to spatiotemporal variance in the CWD during each time period. Spatial patterns of shallow subsurface flow were related to the hydrometeorological conditions of the site. We observed persistent shallow subsurface flow in convergent hillslope positions, except when a catchment was positioned in locations with high CWDs (low elevations and southerly aspects). Alternatively, we observed persistent subsurface flow across all hillslope positions (even 70-m upslope from the hollow) when catchments were positioned in locations with especially low CWDs (northerly aspects and high elevations). These results highlight the importance of considering the superposition of the catchment-scale climatic water balance and hillslope-scale topography when characterizing hydrometeorology and shallow subsurface flow dynamics.en_US
dc.description.sponsorshipUSDA NIFA McIntire Stennis award [233327]; NSF grants [DEB-1457749, DEB-1457720]; NASA applied science program Wildland Fire award [NNH11ZDA001N-FIRES]; NSF EPSCoR through the Montana Institute on Ecosystemsen_US
dc.language.isoenen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.rights©2019. American Geophysical Union. All Rights Reserved.en_US
dc.subjecttopographyen_US
dc.subjecthydrometeorologyen_US
dc.subjectclimatic water balanceen_US
dc.subjectsoil moistureen_US
dc.subjecthydrologic connectivityen_US
dc.subjectshallow subsurface flowen_US
dc.titleThe Climatic Water Balance and Topography Control Spatial Patterns of Atmospheric Demand, Soil Moisture, and Shallow Subsurface Flowen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Sch Nat Resources & Environmen_US
dc.identifier.journalWATER RESOURCES RESEARCHen_US
dc.description.note6 month embargo; published online: 19 February 2019en_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 published versionen_US
dc.source.volume55
dc.source.issue3
dc.source.beginpage2370-2389


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