Canal sediment and peat chemistry at Crymlyn Bog National Nature Reserve (NNR) (2005)
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
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS108672
- Alternative Title
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- Gwaddodion camlesi a chyfansoddiad cemegol mawn yn GNG Cors Crymlyn (2005)
- Metadata Language
- English
- Lineage
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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
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Associated Report Title: Headley, AD. (2005) Investigations of canal sediment and peat chemistry at Crymlyn Bog NNR, South Wales Report No. 721
- Dataset Reference Date (Publication)
- 2005-05-31
Temporal Extent
- Begin date
- 2005-01-12
- End date
- 2005-01-16
- Topic category
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- Environment
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
-
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Documents
()
- Specification
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[A] Hardcopy of report
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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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
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- peatland ecology
- peatlands
- bog management
- bogs
- Crymlyn Bog NNR
- sediments
- NNR (National Nature Reserves)
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- Type
- Theme
Citation
- Date (Revision)
- 2013-04-03
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Investigations of canal sediment and peat chemistry at Crymlyn Bog NNR, South Wales
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© 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
- File Identifier
- 4f4c4942-4343-5764-6473-313038363732 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:16:05.894Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0