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Towards the representation of groundwater in the Joint UK Land Environment Simulator by Batelis, StamatisâChristos; Rahman, Mostaquimur; Kollet, Stefan; Woods, Ross; Rosolem, Rafael is a Environmental Science article available to read on EtoBox.

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## Abstract Groundwater is an important component of the hydrological cycle with significant interactions with soil hydrological processes. Recent studies have demonstrated that incorporating groundwater hydrology in land surface models (LSMs) considerably improves the prediction of the partitioning of water components (e.g., runoff and evapotranspiration) at the land surface. However, the Joint UK Land Environment Simulator (JULES), an LSM developed in the United Kingdom, does not yet have an explicit representation of groundwater. We propose an implementation of a simplified groundwater flow boundary parameterization (JULES‐GFB), which replaces the original free drainage assumption in the default model (JULES‐FD). We tested the two approaches under a controlled environment for various soil types using two synthetic experiments: (1) single‐column and (2) tilted‐V catchment, using a three‐dimensional (3‐D) hydrological model (ParFlow) as a benchmark for JULES’ performance. In addition, we applied our new JULES‐GFB model to a regional domain in the UK, where groundwater is the key element for runoff generation. In the single‐column infiltration experiment, JULES‐GFB showed improved

Who reads Towards the representation of groundwater in the Joint UK Land Environment Simulator?

Author

Batelis, StamatisâChristos; Rahman, Mostaquimur; Kollet, Stefan; Woods, Ross; Rosolem, Rafael

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0885-6087)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)