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| Hauptseite > Publikationsdatenbank > Towards a computationally efficient free-surface groundwater flow boundary condition for large-scale hydrological modelling > print |
| Hauptseite > Publikationsdatenbank > Towards a computationally efficient free-surface groundwater flow boundary condition for large-scale hydrological modelling > print |
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| 100 | 1 | _ | |a Rahman, M. |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Towards a computationally efficient free-surface groundwater flow boundary condition for large-scale hydrological modelling |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2019 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Shallow groundwater is a critical component of the terrestrial water cycle. It sustains baseflow in rivers, supplies root zones with soil moisture during dry periods, and directly influences the land-atmosphere exchange processes. Nonetheless, the integration of groundwater into large-scale hydrological models remains challenging. The most detailed way of representing groundwater dynamics is to incorporate three-dimensional, variably saturated flow processes in the subsurface representation of hydrological models. However, such detailed modelling is still a challenge for global hydrological applications, mainly due to its high computational demand. In this study, a free-surface boundary condition called the Groundwater Flow Boundary (GFB) is developed to represent groundwater dynamics in a more computationally-efficient manner than the full three-dimensional models do. We evaluate GFB using two synthetic test cases, namely an infiltration experiment and a tilted-v catchment, which focus on groundwater recharge and discharge processes, respectively. The simulation results from GFB are compared with a three-dimensional groundwater flow model and with an over-simplified approach using a free-drainage lower boundary condition to assess the impact of our assumptions on model results. We demonstrate that GFB is computationally more efficient compared to the three-dimensional model with limited loss in model performance when simulating infiltration and runoff dynamics. |
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| 700 | 1 | _ | |a Wagener, T. |0 0000-0003-3881-5849 |b 3 |
| 773 | _ | _ | |a 10.1016/j.advwatres.2018.11.015 |g Vol. 123, p. 225 - 233 |0 PERI:(DE-600)2023320-6 |p 225 - 233 |t Advances in water resources |v 123 |y 2019 |x 0309-1708 |
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| 856 | 4 | _ | |y Published on 2018-12-04. Available in OpenAccess from 2020-12-04. |u https://juser.fz-juelich.de/record/859504/files/rahman_etal_2018_update.pdf |
| 856 | 4 | _ | |y Published on 2018-12-04. Available in OpenAccess from 2020-12-04. |x pdfa |u https://juser.fz-juelich.de/record/859504/files/rahman_etal_2018_update.pdf?subformat=pdfa |
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