nerc.ac.uk

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

Le Vine, N.; Butler, A.; McIntyre, N.; Jackson, C.. 2016 Diagnosing hydrological limitations of a land surface model: application of JULES to a deep-groundwater chalk basin. Hydrology and Earth System Sciences, 20 (1). 143-159. 10.5194/hess-20-143-2016

Before downloading, please read NORA policies.
[img]
Preview
Text (Open Access Paper)
hess-20-143-2016.pdf - Published Version
Available under License Creative Commons Attribution.

Download (8MB) | Preview

Abstract/Summary

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.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.5194/hess-20-143-2016
ISSN: 1607-7938
Additional Keywords: GroundwaterBGS, Groundwater, Groundwater modelling, Surface water interaction
Date made live: 08 Jun 2016 09:10 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/513770

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...