Canal sediment and peat chemistry at Crymlyn Bog National Nature Reserve (NNR) (2005)
Gwaddodion camlesi a chyfansoddiad cemegol mawn yn GNG Cors Crymlyn (2005)

  • English
  • wel
  • All

An investigation found that Crymlyn Brook was a major threat to the integrity of the Special Area of Conservation (SAC) qualifying habitats at Crymlyn Bog as it was a source of nitrogen and phosphorous flowing directly in to the area of low-nutrient status transition mire and quaking bog habitats. It was suggested that the course of the brook should be altered to what it was prior to changes and siltation during the latter half of the twentieth century. This would result in it avoiding the sensitive habitats, instead connecting to Glan-y-Wern canal the main route by which water leaves the mire. This dataset contains the results of a survey of the possible route for the reinstatement of the Crymlyn Brook relating to the extant vegetation along the route and the degree and depth to which the substratum is contaminated with mineral oil. Also examined were the depth of the Glan-y-Wern canal and the degree to which the sediments in the canal are contaminated with heavy metals and mineral oil. The purpose of this data capture was to provide information on the depth of standing water in the canal, the chemistry of it's sediments, and various aspects relating to the extent of hydrocarbon pollution within peat lying along the course of a proposed drainage feature.

Identification

Dynodydd
Identifier
NRW_DS108672
Teitl Amgen
Alternative Title
Laith Metadata
Metadata Language
English
Lineage

Sediments were collected and water depth measured at ten sample sites along the Glan-y-Wern canal. A Russian chambered corer was found to be most successful at sampling the bottom sediments, depth of water was measured using a 2.4m, 20mm diameter wooden dowel with graduations and a white wooden circular disk attached to its end. Estimates of the depth of unconsolidated sediment were made at sites accessible by boat. The route of the proposed ditch was surveyed at 21 sample locations at approximately 50m intervals. At each location the grid reference to the nearest metre was taken with a GPS and a simple description of the vegetation was noted (listing dominant species and probable community types). The gross stratigraphy of the peat was described in the field after samples were extracted using a Russian corer down to a depth of 1.5m. The degree of oil contamination was estimated using a six-point scale. Analytical methods were used to measure total nitrogen, phosphorous, sulphur, arsenic, diesel range hydrocarbon etc and the solubility of heavy metals was investigated. Survey initiated in response to a 2004 study which proposed the creation of a link between the functional distal portion of Crymlyn Brook and the Glan Y Wern Canal.
Additional Information

Associated Report Title: Headley, AD. (2005) Investigations of canal sediment and peat chemistry at Crymlyn Bog NNR, South Wales Report No. 721
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2005-05-31

Temporal Extent

Begin date
2005-01-12
End date
2005-01-16
 
Categori pwnc
Topic category
  • Environment
    Environment
  • Biota
    Biota
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Wells -
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Cychwynnwr
Originator
  Headley -
Not Provided
Not Provided
Cychwynnwr
Originator
  Countryside Council for Wales (CCW) -
Not Provided
Not Provided
 

Extent

Extent

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


 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ( )

    Specification

    [A] Hardcopy of report

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Sediments were collected and water depth measured at ten sample sites along the Glan-y-Wern canal. A Russian chambered corer was found to be most successful at sampling the bottom sediments, depth of water was measured using a 2.4m, 20mm diameter wooden dowel with graduations and a white wooden circular disk attached to its end. Estimates of the depth of unconsolidated sediment were made at sites accessible by boat. The route of the proposed ditch was surveyed at 21 sample locations at approximately 50m intervals. At each location the grid reference to the nearest metre was taken with a GPS and a simple description of the vegetation was noted (listing dominant species and probable community types). The gross stratigraphy of the peat was described in the field after samples were extracted using a Russian corer down to a depth of 1.5m. The degree of oil contamination was estimated using a six-point scale. Analytical methods were used to measure total nitrogen, phosphorous, sulphur, arsenic, diesel range hydrocarbon etc and the solubility of heavy metals was investigated. Survey initiated in response to a 2004 study which proposed the creation of a link between the functional distal portion of Crymlyn Brook and the Glan Y Wern Canal.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Allweddair
Keywords

NRW Thesaurus
  • sediments
  • peatland ecology
  • peatlands
  • Crymlyn Bog NNR
  • NNR (National Nature Reserves)
  • bogs
  • bog management
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

IPSV Subjects List
  • Canals
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2020-11-18
Code
geonetwork.thesaurus.external.theme.subjects
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Investigations of canal sediment and peat chemistry at Crymlyn Bog NNR, South Wales
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

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

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313038363732 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-09-28T10:54:49.617Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
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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