The impact of upland land management on flooding: results from an improved pasture hillslope

Marshall, Miles R., Francis, Oliver J., Frogbrook, Zoe L., Jackson, Bethanna M., McIntyre, Neil, Reynolds, Brian, Solloway, Imogen, Wheater, Howard S. and Chell, Joanne (2009) The impact of upland land management on flooding: results from an improved pasture hillslope. Hydrological Processes, 23 3: 464-475. doi:10.1002/hyp.7157

Author Marshall, Miles R.
Francis, Oliver J.
Frogbrook, Zoe L.
Jackson, Bethanna M.
McIntyre, Neil
Reynolds, Brian
Solloway, Imogen
Wheater, Howard S.
Chell, Joanne
Title The impact of upland land management on flooding: results from an improved pasture hillslope
Journal name Hydrological Processes   Check publisher's open access policy
ISSN 0885-6087
Publication date 2009-01-01
Year available 2009
Sub-type Article (original research)
DOI 10.1002/hyp.7157
Open Access Status Not yet assessed
Volume 23
Issue 3
Start page 464
End page 475
Total pages 12
Place of publication West Sussex, United Kingdom
Publisher John Wiley and Sons Ltd.
Language eng
Formatted abstract
In response to growing concern about impacts of upland agricultural land management on flood risk, an intensely instrumented experimental catchment has been established at Pontbren, a sheep-farmed headwater catchment of the River Severn, UK. Primary aims are to develop understanding of the processes governing flood generation and the associated impacts of land management practices, and to bridge the gap between process understanding and ability to predict effects on downstream flooding. To achieve this, the experiment is designed to operate at plot (∼100 m2), hillslope (∼0·1 km2) and small catchment scale (∼10 km2). Hillslope-scale data, from an under-drained, agriculturally ‘improved’ pasture, show that drain flow is a dominant runoff process. However, depending on antecedent moisture conditions, overland flow may exceed drain flow rates and can be an important contributor to peak flow runoff at the hillslope-scale. Flow, soil tension data and tracer tests confirm the importance of macropores and presence of perched water tables under ‘normal’ wet conditions. Comparisons of pasture runoff with that from within a 10 year-old tree shelterbelt show significantly reduced overland flow due to the presence of trees and/or absence of sheep. Comparisons of soil hydraulic properties show significant increases in hydraulic conductivity and saturated moisture content of soil under trees compared to adjacent improved pasture.
Keyword Flood risk
Land management
Land use
Agricultural Land
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID GR/S76304/01
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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