caa a22 4500 445815493 CHVBK 20180317145227.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10040-010-0690-1 doi (NATIONALLICENCE)springer-10.1007/s10040-010-0690-1 Influences of subsurface heterogeneity and vegetation cover on soil moisture, surface temperature and evapotranspiration at hillslope scales [Elektronische Daten] [Adam Atchley, Reed Maxwell] Influence des hétérogénéités de surface et du couvert végétal sur l'humidité du sol, température de surface et évapotranspiration à l'échelle du versant Physical processes are at the root of determining hydrologic response at all scales. Here, the physical mechanisms linking (1) subsurface heterogeneities to soil moisture and (2) resulting land-surface energy feedbacks to the atmosphere, are examined at the hillslope scale using a fully coupled surface-subsurface-land-surface model, ParFlow. A hillslope with a heterogeneous subsurface and uniform topography was modeled numerically using summer atmospheric conditions and a single precipitation event under controlled boundary conditions in order to isolate the contribution of hydraulic conductivity to land-surface hydrological processes and energy interactions. Patterns of subsurface hydraulic conductivity are shown to govern soil-moisture distribution at the hillslope scale following precipitation. This variability in soil moisture is closely linked to the variability in land-surface energy feedbacks. The role that vegetation plays in subsurface soil moisture and land energy communications is also examined. Results show that hillslope soil moisture variation is first established by patterns in vertical hydraulic conductivity, while later on in the dry-down period, vegetation exerts greater control on the land-surface energy fluxes and controls the rate of hillslope dry down. Furthermore, as compared to bare-soil simulations, grass-cover simulations show an increase in near-surface soil moisture despite water up-take along the rooting depth. Springer-Verlag, 2010 Soil moisture modeling nationallicence Hydraulic conductivity nationallicence Heterogeneity nationallicence Land energy flux nationallicence USA nationallicence Atchley Adam Hydrologic Science and Engineering Program, Department of Geology and Geologic Engineering, Colorado School of Mines, 1500 Illinois St, 80401, Golden, CO, USA aut Maxwell Reed Hydrologic Science and Engineering Program, Department of Geology and Geologic Engineering, Colorado School of Mines, 1500 Illinois St, 80401, Golden, CO, USA aut Hydrogeology Journal Springer-Verlag 19/2(2011-03-01), 289-305 1431-2174 19:2<289 2011 19 10040 https://doi.org/10.1007/s10040-010-0690-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-010-0690-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Atchley Adam Hydrologic Science and Engineering Program, Department of Geology and Geologic Engineering, Colorado School of Mines, 1500 Illinois St, 80401, Golden, CO, USA aut NATIONALLICENCE 700 1- Maxwell Reed Hydrologic Science and Engineering Program, Department of Geology and Geologic Engineering, Colorado School of Mines, 1500 Illinois St, 80401, Golden, CO, USA aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/2(2011-03-01), 289-305 1431-2174 19:2<289 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer