Fluvial Audits of Welsh River Systems
Geomorphological assessments that utilised historical information, contemporary field survey and scientific literature resources, have been undertaken for various Welsh river systems of high conservation importance including the Usk, Wye, Dee and Tywi. The purpose of these fluvial audits it to record the morphological features and to identify, and understand the geomorphological processes that influence and control the channel activity, and the morphological quality of the river systems. Specific aims of each project include (but are not limited to): - Developing an understanding of the dynamic geomorphology of the key Welsh river systems. - Examining changes to the channel planform over time using historical maps and aerial photographs. - Investigating channel and catchment changes using historical records and consultation with Environment Agency (EA) staff, and to develop a time chart which identifies Potentially Destabilising Phenomena (PDP's). - Identifying the major geomorphological features and processes occurring by undertaking a field survey of present erosion, deposition, bank protection, flow types and sediment sources. - Identifying the key areas of channel instability (geomorphological activity) and determine the possible factors affecting this instability, in particular those contributing to any severe bank erosion evident. - Determining the presence and absence of geomorphological features associated with the SAC species habitats.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS101833
- Teitl Amgen
-
- Archwiliadau afonol o systemau afonydd Cymru
- Laith Metadata
- English
- Datganiad
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A standard field methodology was used for the, fluvial audit, which consists of: i) a desk study to collate historical data sources which record changes in the catchment, both natural and anthropogenic, which may have disturbed the fluvial system (discharge or sediment supply), and had direct implications on the channel morphology (change in channel planform, long profile and cross sectional geometry) ii) a contemporary field survey which integrated the key components of both a Detailed Catchment Baseline Survey (DCBS) and Fluvial Audit (FA), and emphasised assessment of the controls and extent of erosion and deposition along the channel. The surveys have investigated the channel morphology, in particular the presence of bank erosion on a reach-by-reach basis and artificial influences on the channel. This, together with historic analysis enables an assessment of the stability or dynamics of the river system over time and whether it is adjusted to the prevailing flow processes and sediment dynamics, or unstable and actively adjusting (eroding). The surveys have also related the presence or absence of morphological features to the condition parameters that are identified as habitat preferences for the Special Areas of Conservation species.
- Gwybodaeth ychwanegol
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See the separate metadata entries Fluvial Audit of the Upper Usk Tributaries, River Dee, Afon Tywi, and the River Wye and tributaries listed below in the Contains Field.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2007-07-31
Ystod amser
- Dyddiad cychwyn
- 1953-12-31
- Dyddiad gorffen
- 2007-07-31
- Categori pwnc
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- Inland waters
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Documents
Documents
()
- Math
-
Fluvial Audit of the Upper Usk Tributaries (110182) [A] Report in PDF (some sections of report available in Word). [B] JPEG field photos and MapInfo.TAB detailing position and bearing of photo points. [C] GIS products e.g. bank status, bar area tree cover etc- MapInfo.Tab [D] Field survey data- MS Access Fluvial Audit of the River Dee (110183) [A] Dee timechart and Final report ( Microsoft Word) [B] Final report (PDF and Microsoft Word) [C] DeeData Access Database [D] Field Data in Map Info Format [E] Access Data in Map Info Format [F] Field Photographs JPEG [G] Geological Data in Map Info Format [H] Historical information in Map Info Format [I] River, Canal and Reservoir locations in Map Info Format [J] Location of Files .csv format [K] Hotlinked Photographs in Map Info Format Fluvial Audit of the Afon Tywi (111562) [A] Report: Adobe Portable Document Format versions of Volume 1 and 3 of project report. Paper copy of all volumes- Volume 1: Technical Report; Volume 2: Maps Report; Volume 3: Short report for use by river managers. [B] GIS Data: MapInfo tables- Species data, Bank protection, Gravel extraction, Channel line Fluvial audit of the River Wye and tributaries (111860) [A] Report: Microsoft Word and Adobe Portable Document Format versions of project report, GIS Metadata Report and PDF of sheet used during the fieldwork to assess sediment clast sizes and vegetation cover. [B] GIS Data: Bank Protection, Coarse Woody Debris, Embankments, Erosion, Geomorphological Reaches, Historical Changes, Habitat Sustainability Analysis (HAS), Photos, Sediment Sources (linear feature), Sediment Sources (point feature), Sediment Storage (Area), Structures and Terraces. [C] Photos: Field photos (JPEG format) taken on site and a spreadsheet (River_Wye_Photos_with_XY.xls) summarising the geographic location (easting and northing) for each image. Images are hyperlinked in relevant GIS layer. [D] Habitat Suitability Analysis spreadsheets: HAS.XLS
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Documents
Documents
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
A standard field methodology was used for the, fluvial audit, which consists of: i) a desk study to collate historical data sources which record changes in the catchment, both natural and anthropogenic, which may have disturbed the fluvial system (discharge or sediment supply), and had direct implications on the channel morphology (change in channel planform, long profile and cross sectional geometry) ii) a contemporary field survey which integrated the key components of both a Detailed Catchment Baseline Survey (DCBS) and Fluvial Audit (FA), and emphasised assessment of the controls and extent of erosion and deposition along the channel. The surveys have investigated the channel morphology, in particular the presence of bank erosion on a reach-by-reach basis and artificial influences on the channel. This, together with historic analysis enables an assessment of the stability or dynamics of the river system over time and whether it is adjusted to the prevailing flow processes and sediment dynamics, or unstable and actively adjusting (eroding). The surveys have also related the presence or absence of morphological features to the condition parameters that are identified as habitat preferences for the Special Areas of Conservation species.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
-
- fluvial geomorphology
- fluvial processes
- rivers (see also specific river names)
- river Dee (afon Dyfrdwy)
- river Tywi (afon Tywi)
- River Usk
- River Wye (Afon Gwy)
- marine and freshwater inventory
- fluvial
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
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A fluvial audit of the Afon Tywi : Volume 1 : technical report
- Teitlau cysylltiedig CNC
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A fluvial audit of the Afon Tywi : Volume 2 : map volume
- Teitlau cysylltiedig CNC
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A fluvial audit of the Afon Tywi : Volume 2 : map volume (addendum revised figure 16d)
- Teitlau cysylltiedig CNC
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A fluvial audit of the Afon Tywi : Volume 3 : summary report
- Teitlau cysylltiedig CNC
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Fluvial audit of the River Dee
- Teitlau cysylltiedig CNC
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Fluvial audit of the upper Usk tributaries
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
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There are partial access restrictions to this data. Please refer to individual metadata entries in the 'contains' field for specific restrictions. Fluvial Audit of the Upper Usk Tributaries (URI: 110182) Fluvial Audit of the River Dee (110183) Fluvial Audit of the Afon Tywi (URI: 111562) Fluvial audit of the River Wye and tributaries (URI: 111860)
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
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There are use restrictions on this data. Please refer to individual metadata entries in the 'contains' field for specific restrictions. Fluvial Audit of the Upper Usk Tributaries (URI: 110182) Fluvial Audit of the River Dee (110183) Fluvial Audit of the Afon Tywi (URI: 111562) Fluvial audit of the River Wye and tributaries (URI: 111860)
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313031383333 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-30T15:37:55.826Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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1.0