Case study:Nant Barrog - Revision history

Alexrrc at 12:44, 8 November 2018

2018-11-08T12:44:52Z

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Alexrrc at 12:44, 8 November 2018

2018-11-08T12:44:40Z

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	\|Specific mitigation=Flood risk management,		\|Specific mitigation=Flood risk management,
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			\|Other technical measure=Runoff pathway management,
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Alexrrc at 12:44, 8 November 2018

2018-11-08T12:44:22Z

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	\|Funding sources=Rural Development Plan Sustainable Management Scheme		\|Funding sources=Rural Development Plan Sustainable Management Scheme
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			\|Specific mitigation=Flood risk management,
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	{{Measures}}		{{Measures}}
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Alexrrc at 12:43, 8 November 2018

2018-11-08T12:43:59Z

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	\|Invasive species present=No		\|Invasive species present=No
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	{{Project background}}		{{Project background
			\|Project started=2017
			\|Funding sources=Rural Development Plan Sustainable Management Scheme
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Alexrrc at 12:41, 8 November 2018

2018-11-08T12:41:03Z

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	{{Case study subcatchment}}		{{Case study subcatchment}}
	{{Site}}		{{Site
			\|Name=Nant Barrog
			\|Heavily modified water body=No
			\|Protected species present=No
			\|Invasive species present=No
			}}
	{{Project background}}		{{Project background}}
	{{Motivations}}		{{Motivations}}

Alexrrc at 12:38, 8 November 2018

2018-11-08T12:38:14Z

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	{{Project overview		{{Project overview
	~~\|Project title=Nant Barrog~~
	\|Status=In progress		\|Status=In progress
			\|Project web site url=www.therrc.co.uk/sites/default/files/projects/41_nantbarrog.pdf
	\|Themes=Flood risk management, Habitat and biodiversity, Land use management - agriculture, Land use management - forestry, Water quality		\|Themes=Flood risk management, Habitat and biodiversity, Land use management - agriculture, Land use management - forestry, Water quality
	\|Country=Wales		\|Country=Wales
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	\|Contact organisation=Natural Resources Wales		\|Contact organisation=Natural Resources Wales
	\|Contact organisation url=naturalresources.wales/?lang=en		\|Contact organisation url=naturalresources.wales/?lang=en
			\|Partner organisations=Coed Cymru, Bangor University, Woodland Trust,
	\|Multi-site=No		\|Multi-site=No
			\|Project picture=41 Nant Barrog.png
			\|Project summary=In 2012, the city of St Asaph – located on a downstream reach of the Afon Elwy (Map 1) – suffered severe flooding which resulted in a fatality. Natural Resources Wales began an investigation into how traditional hard engineered approaches, such as those proposed for the St Asaph flood alleviation scheme, could be supported by Working with Natural Processes (WWNP) measures. The investigation also looked at how these measures could have multiple ecosystem benefits.
			Llanfair Talhaiarn is a small village in the Elwy catchment, located at the confluence of Nant Barrog with the main river Elwy. The Nant Barrog is conveyed beneath the main street to the Elwy through the Water Street culvert. In periods of high rainfall the culvert is overwhelmed, resulting in flooding of properties in the village. Natural Resources Wales is reviewing the refurbishment of the culvert.
			WWNP measures recommended for the Barrog in the Elwy Natural Flood Risk Management and Ecosystem Services Study (2015) were further reviewed at the subcatchment scale. WWNP measures for the Nant Barrog catchment were recommended in the Llanfair Talhaiarn Natural Flood Management Study (2015). A revision of the shortlisted options was further reviewed as part of the Llanfair Talhaiarn project appraisal report (2016) and the cost benefits of the different options were considered. The resulting recommended WWNP measures are listed in Table 1..
			Coed Cymru, in partnership with Natural Resources Wales, the Woodland Trust and other organisations, will submit a bid in 2017 to the Welsh Government Rural Development Plan Sustainable Management Scheme for funding to implement the measures recommended in the Llanfair Talhaiarn report.
			The Water Street culvert has an inlet capacity of 4.2m3s-1. Flooding will occur at a return period of a 1 in 50 year event with a peak flow of 4.8m3s-1. Modelling of 4 WWNP packages showed that, when considered separately, sufficient reductions would occur during the 1 in 50 year event for flow to remain within the channel at the culvert.
			\|Project title=Nant Barrog
	}}		}}
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Alexrrc: Created page with "{{Case study status |Approval status=Draft }} {{Location |Location=53.19949270000001, -3.616148399999929 }} {{Project overview |Project title=Nant Barrog |Status=In progress |..."

2018-11-08T12:32:14Z

Created page with "{{Case study status |Approval status=Draft }} {{Location |Location=53.19949270000001, -3.616148399999929 }} {{Project overview |Project title=Nant Barrog |Status=In progress |..."

New page

{{Case study status
|Approval status=Draft
}}
{{Location
|Location=53.19949270000001, -3.616148399999929
}}
{{Project overview
|Project title=Nant Barrog
|Status=In progress
|Themes=Flood risk management, Habitat and biodiversity, Land use management - agriculture, Land use management - forestry, Water quality
|Country=Wales
|Main contact forename=Jacques
|Main contact surname=Sisson
|Contact organisation=Natural Resources Wales
|Contact organisation url=naturalresources.wales/?lang=en
|Multi-site=No
}}
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{{Case study subcatchment}}
{{Site}}
{{Project background}}
{{Motivations}}
{{Measures}}
{{Hydromorphological quality elements header}}
{{End table}}
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{{Monitoring documents}}
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{{Additional Documents}}
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{{Supplementary Information}}
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