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| Titel |
Investigating the potential to reduce flood risk through catchment-based land management techniques and interventions in the River Roe catchment, Cumbria,UK |
| VerfasserIn |
Callum Pearson, Sim Reaney, Louise Bracken, Lucy Butler |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250101771
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| Publikation (Nr.) |
 EGU/EGU2015-1001.pdf |
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| Zusammenfassung |
| Throughout the United Kingdom flood risk is a growing problem and a significant
proportion of the population are at risk from flooding throughout the country. Across
England and Wales over 5 million people are believed to be at risk from fluvial,
pluvial or coastal flooding (DEFRA, 2013). Increasingly communities that have not
dealt with flooding before have recently experienced significant flood events. The
communities of Stockdalewath and Highbridge in the Roe catchment, a tributary of the
River Eden in Cumbria, UK, are an excellent example. The River Roe has a normal
flow of less than 5m3 sec-1 occurring 97 percent of the time however there have
been two flash floods of 98.8m3 sec-1 in January 2005 and 86.9m3 sec-1 in May
2013.
These two flash flood events resulted in the inundation of numerous properties within
the catchment with the 2013 event prompting the creation of the Roe Catchment
Community Water Management Group which aims are to deliver a sustainable
approach to managing the flood risk. Due to the distributed rural population the
community fails the cost-benefit analysis for a centrally funded flood risk mitigation
scheme. Therefore the at-risk community within the Roe catchment have to look
for cost-effective, sustainable techniques and interventions to reduce the potential
negative impacts of future events; this has resulted in a focus on natural flood risk
management.
This research investigates the potential to reduce flood risk through natural
catchment-based land management techniques and interventions within the Roe catchment;
providing a scientific base from with further action can be enacted. These interventions
include changes to land management and land use, such as soil aeration and targeted
afforestation, the creation of runoff attenuation features and the construction of in
channel features, such as debris dams. Natural flood management (NFM) application
has been proven to be effective when reducing flood risk in smaller catchments
and the potential to transfer these benefits to the Roe catchment (~69km2) have
been assessed. Furthermore these flood mitigation features have the potential to
deliver wider environmental improvements throughout the catchment and hence
the potential for multiple benefits such as diffuse pollution reduction and habitat
creation are considered. The research explores the impact of NFM techniques, flood
storage areas or afforestation for example, with a view to enhancing local scale
habitats.
The research combines innovative catchment modelling techniques, both risk-based
approaches (SCIMAP Flood) and spatially distributed hydrological simulation modelling
(CRUM3), with in-field monitoring and observation of flow pathways and tributary response
to rainfall using time-lapse cameras. Additional work with the local community and
stakeholders will identify the range and location of potential catchment-based land
management techniques and interventions being assessed; natural flood management
implementation requires the participation and cooperation of landowners and local
community to be successful (Howgate and Kenyon, 2009). |
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