Baseline survey for the Afon Teifi restoration project

The Afon Teifi is the longest river to have its course entirely within Wales. Its conservation value is high, the entire river having Special Area of Conservation (SAC) status. Not far below its source in Teifi Pools, the river traverses the Cors Caron National Nature Reserve, meandering its way between the raised bogs for which the reserve is renowned. Parts of this sinuous course were canalized about a century ago, creating sections of unusually straight and deep channel between steep clay banks. It is proposed to restore these reaches of the river to their original course, turning the canalized sections into new lentic water bodies. This dataset includes the results of a baseline survey conducted in 2006-2007 which focussed on sediments, invertebrates and fish. Sediment sampling was conducted to determine the extent of metal contamination of the material that would be excavated in the course of the restoration. The purpose of this data capture is to contribute to the evidence base that would be essential to completing a fully documented restoration project. Sediment sampling was conducted to determine the extent of metal contamination of the material that would be excavated in the course of the restoration. The risk of metal contamination exists due to historic mining in the upper part of the catchment. Invertebrate sampling aimed to establish the potential for improvement of the river's conservation value by comparing the invertebrate assemblages of the uncanalized reaches with the canalized sections. It also aimed to establish the conservation value of the existing pond in the original channel, providing both a measure of the potential loss and a benchmark for the development of the replacement ponds in the canalized sections post-restoration. Survey of fish in an upstream uncanalized reach and in two canalized sections aimed to provide a baseline for the assessment of the effect of restoration on the suitability of the river for fish.

Identification

Identifier
NRW_DS110179
Alternative Title
  • Arolwg sylfaenol ar gyfer prosiect adfer afon Teifi
Metadata Language
English
Lineage

Sediment samples: taken in Jan '06 as intact cores on transects at 14 points along the former river course. Samples were bulked for analysis of each transect with individual samples retained for further analysis if appropriate. Samples also taken from the existing riverbed at two points above and below where realignment is proposed; sediment recently deposited on river banks (various locations) was also collected. Pond invertebrates: one sample collected on 11/07/06 from each of three sites on the pond by methods recommended in the National Pond Survey Protocol. River invertebrates: Samples collected from 9 sites on the Teifi on 11-12/04/06 and 18/10/06. The midstream samples consisted of four 30-second kick samples which together included as many varieties of sediment type as were represented at the site. The east and west bank samples collected from the face of the bank by kicking in deeper water or by net sweeping nearer the water surface. Two 15 second samples were collected from each bank at each site. River fish: All the samples collected on 17/07/06. Fish were collected using hand seining and hand netting. Fish sampled were passed to an assistant located on the bank for identification, photographing, and standard length measuring. All fish were returned to the river.
Dataset Reference Date (Publication)
2008-03-31
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  University of Wales, Aberystwyth
Old College, King Street, Aberystwyth, Ceredigion, SY23 2AX, Wales
http://www.aber.ac.uk/en
 

Extent

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
 
 

Distribution

Format Type and Description
  • Documents ()

    Specification

    [A] Report: word and pdf format [B] Data: Excel spreadsheets

 

Quality

Data quality

Quality Scope
Dataset
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation
Degree
false
Lineage

Sediment samples: taken in Jan '06 as intact cores on transects at 14 points along the former river course. Samples were bulked for analysis of each transect with individual samples retained for further analysis if appropriate. Samples also taken from the existing riverbed at two points above and below where realignment is proposed; sediment recently deposited on river banks (various locations) was also collected. Pond invertebrates: one sample collected on 11/07/06 from each of three sites on the pond by methods recommended in the National Pond Survey Protocol. River invertebrates: Samples collected from 9 sites on the Teifi on 11-12/04/06 and 18/10/06. The midstream samples consisted of four 30-second kick samples which together included as many varieties of sediment type as were represented at the site. The east and west bank samples collected from the face of the bank by kicking in deeper water or by net sweeping nearer the water surface. Two 15 second samples were collected from each bank at each site. River fish: All the samples collected on 17/07/06. Fish were collected using hand seining and hand netting. Fish sampled were passed to an assistant located on the bank for identification, photographing, and standard length measuring. All fish were returned to the river.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • river Teifi (Afon Teifi)
  • Cors Caron NNR
  • baseline survey
  • river restoration
  • marine and freshwater inventory
  • environmental restoration
  • Cors Caron
Type
Theme

Citation

Date (Publication)
2024-04-09
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

NRW Related Title

Baseline report for the Afon Teifi restoration project
NRW Related Title

A monitoring strategy for the Afon Teifi restoration project
 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW 2008 There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313130313739 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2024-05-31T10:57:21.201Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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