Hydrological modelling of drained blanket peatland

Ballard, C. E., McIntyre, N., Wheater, H. S., Holden, J. and Wallage, Z. E. (2011) Hydrological modelling of drained blanket peatland. Journal of Hydrology, 407 1-4: 81-93. doi:10.1016/j.jhydrol.2011.07.005


Author Ballard, C. E.
McIntyre, N.
Wheater, H. S.
Holden, J.
Wallage, Z. E.
Title Hydrological modelling of drained blanket peatland
Journal name Journal of Hydrology   Check publisher's open access policy
ISSN 0022-1694
Publication date 2011-09
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.jhydrol.2011.07.005
Open Access Status
Volume 407
Issue 1-4
Start page 81
End page 93
Total pages 13
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Collection year 2011
Language eng
Formatted abstract
Open ditch drainage is a commonly implemented land management practice in upland blanket peatlands, particularly in the UK, where policy decisions between the 1940s and 1970s led to widespread drainage of the uplands. The change in the hydrological regime associated with the drainage of blanket peat is poorly understood, yet has perceived importance for flooding, low flows and water quality. We propose a new simplified physics-based model that allows the associated hydrological processes and flow responses to be explored. The model couples four one-dimensional models to represent a three-dimensional hillslope, allowing for the exploration of flow and water table response throughout the model domain for a range of drainage configurations and peat properties. The model is tested against a data set collected from Oughtershaw Beck, UK, with results showing good model performance for wet periods although less conformity with borehole observations during rewetting periods. A wider exploration of model behaviour indicates that the model is consistent with the hydrological response reported in the literature for a number of drained blanket peat sites, and therefore has potential to provide guidance to decision makers concerning the effects of management practices. Through a global sensitivity analysis, we conclude that further field investigations to assist in the surface and drain roughness parameterisation would help reduce the uncertainty in the model predictions.
Keyword Peatlands
Runoff
Water table
Ditches
Drainage
Modelling
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Water in the Minerals Industry
 
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