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Diagnosing hydrological limitations of a land surface model: application of JULES to a deep-groundwater chalk basin

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Title: Diagnosing hydrological limitations of a land surface model: application of JULES to a deep-groundwater chalk basin
Authors: Le Vine, N
Butler, A
McIntyre, N
Jackson, C
Item Type: Journal Article
Abstract: Land surface models (LSMs) are prospective starting points to develop a global hyper-resolution model of the terrestrial water, energy, and biogeochemical cycles. However, there are some fundamental limitations of LSMs related to how meaningfully hydrological fluxes and stores are represented. A diagnostic approach to model evaluation and improvement is taken here that exploits hydrological expert knowledge to detect LSM inadequacies through consideration of the major behavioural functions of a hydrological system: overall water balance, vertical water redistribution in the unsaturated zone, temporal water redistribution, and spatial water redistribution over the catchment's groundwater and surface-water systems. Three types of information are utilized to improve the model's hydrology: (a) observations, (b) information about expected response from regionalized data, and (c) information from an independent physics-based model. The study considers the JULES (Joint UK Land Environmental Simulator) LSM applied to a deep-groundwater chalk catchment in the UK. The diagnosed hydrological limitations and the proposed ways to address them are indicative of the challenges faced while transitioning to a global high resolution model of the water cycle.
Issue Date: 18-Jan-2016
Date of Acceptance: 27-Nov-2015
URI: http://hdl.handle.net/10044/1/46052
DOI: https://dx.doi.org/10.5194/hess-20-143-2016
ISSN: 1027-5606
Publisher: European Geosciences Union (EGU)
Start Page: 143
End Page: 159
Journal / Book Title: Hydrology and Earth System Sciences
Volume: 20
Copyright Statement: © Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/)
Keywords: Science & Technology
Physical Sciences
Geosciences, Multidisciplinary
Water Resources
Geology
ENVIRONMENT SIMULATOR JULES
RAINFALL-RUNOFF MODEL
UNSATURATED ZONE
SOLUTE TRANSPORT
PART 1
WATER
SYSTEM
UK
CLIMATE
RECHARGE
Environmental Engineering
0406 Physical Geography And Environmental Geoscience
0905 Civil Engineering
0907 Environmental Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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