Afon Gwy - United Kingdom

Basic Information
Site Name
Afon Gwy
Short name
UWMN_18b
Country
United Kingdom
Web Address
Afon Gwy on UWMN
Site Manager
Don Monteith
Site Description
UK Upland Waters Monitoring Network (UK UWMN) site. The Afon Gwy lies to the east of Plynlimon in central Wales and forms part of the headwater system of the River Wye. The catchment area is 389 ha and rises from 380 m at the sampling station to a maximum altitude of 730 m. Catchment soils are dominated by peats and stagnopodsols. The underlying geology is Lower Palaeozoic mudstones, shales and grits of the Gwestyn and Van formations, overlain in places by locally-derived glacial drift. The catchment consists of moorland grasses, notably Molinia and Nardus, with Eriophorum and the moss Racomitrium on areas of wetter land and Pteridium on the lower slopes. The majority of this grassland supports rough grazing for sheep and in ...
Show more ...
Relationships to other sites
This site belongs to:
Last modified
2023-07-28 11:07:38

CC-BY-NC Logo

General Characteristics and Status
Site Status
Operational
Year Established
1991
Observed properties
ecosystem parameterwater parameterchemical parameterbiological parameterdiversityindexfaunisticdiversityfloristicdiversityinorganicnutrientcontentplantspeciescompositionspeciescompositionspecieslistspeciespresencespeciesrichnesschlorophyllcontentofwaterconductivitystageheightwateraciditywateralkalinitywaterlevelwaterqualitywatertemperaturewatertransparencyammoniumcontentdissolvednutrientdissolvedorganiccarboninwatersuspendedsolidstotalorganiccarbonchangeinpopulationsizeovertimenitrogencontent
Affiliation and Network Specific Information
Affiliation
UK Upland Waters Monitoring Network✖ (UWMN_18)The affiliation of this site with "UK Upland Waters Monitoring Network" is not verified by the network on DEIMS-SDR.
UK Eutrophying and Acidifying atmospheric Pollutants network (UKEAP)✖The affiliation of this site with "UK Eutrophying and Acidifying atmospheric Pollutants network (UKEAP)" is not verified by the network on DEIMS-SDR.
Photos
Gwy flume
Gwy flume
Geographic
1 km
3000 ft
View in site map
Centroid/Representative Coordinates

Latitude: 52.4539 Longitude: -3.73202

Size
ca. 389.00ha
Elevation (average)
555.00msl
Elevation (min)
380.00msl
Elevation (max)
730.00msl
Download

Site information [.json]

Centroid/representative coordinates [.shp] [.kml]
Bounding Box [.shp] [.kml]
Boundaries [.shp] [.kml]
GEO-BON Biome
Fresh water rivers
Biome
Fresh Water Rivers
Ecosystem Type
Rivers
Biogeographical Region
Atlantic Bio-geographical Region
EUNIS habitat
Inland surface waters (C)
Inland surface waters (C) » Surface running waters (C2)
Air Temperature: Average Annual
10.00°C
Precipitation Annual
2600.00mm
Geology
The underlying geology is Lower Palaeozoic mudstones, shales and grits of the Gwestyn and Van formations, overlain in places by locally-derived glacial drift.
Vegetation
The catchment consists of moorland grasses, notably Molinia and Nardus, with Eriophorum and the moss Racomitrium on areas of wetter land and Pteridium on the lower slopes.
Soils
Peats and stagnopodsols
Hydrology
The altitude range is from 440 m to 700 m in the headwaters. The channel section utilised for biological sampling is 3-4 m wide and comprises a series of bedrock ledges, falls and boulder strewn riffles.
Site Type
Stationary land-based site
Design of Experimentation
no experimentation
Scale of Experimentation
not applicable
Design of Observation
only observation
Scale of Observation
plot within catchment
Permanent Power Supply
No
Equipment
Data infrastructure » Data storage » Relational database
Equipment notes
Accommodation in nearby villages
Accessible All Year
Yes
All parts of Site Accessible
No
Permanent Operation
Yes
Operation Notes
Chemistry sampled monthly. Biological measurements made annually
Site Visit Interval
30
General Data Policy
The data provider must be offered co-authorship for publications using this dataset at least within the metadata description
LTER Site Classification
Extensive
There is EURO-CORDEX climate scenario data available for this site:
Projected Near Surface Specific Humidity ChangeRCP26RCP45RCP85
Projected Precipitation ChangeRCP26RCP45RCP85
Projected Sea Level Pressure ChangeRCP26RCP45RCP85
Projected Surface Downwelling Shortwave RadiationRCP26RCP45RCP85
Projected Near-Surface Wind SpeedRCP26RCP45RCP85
Projected Near-Surface Air TemperatureRCP26RCP45RCP85
Projected Daily Maximum Near-Surface Air TemperatureRCP26RCP45RCP85
Projected Daily Minimum Near-Surface Air TemperatureRCP26RCP45RCP85

You can also download the entire climate scenario dataset for this site from the EUDAT B2SHARE data store.