Llyn Llagi - United Kingdom

Basic Information
Site Name
Llyn Llagi
Short name
L08
Country
United Kingdom
Web Address
ECN website
Llyn Llagi on UWMN
Llyn Llagi on UK Lakes Portal
Operating Organisation
ENSIS Ltd, Environmental Change Research Centre, University College London
Site Manager
Ewan Shilland
Site Description
UK ECN and UK UWMN site. Llyn Llagi occupies a north-facing corrie in the central area of the Snowdonia region of North Wales. The lake lies at 380 m beneath a steep backwall and comprises a deep, almost circular basin (maximum depth 16.5 m) bordered by an extensive shallow (1 m deep) rim. The lake covers an area of 5.67ha and the primary inflow constitutes the outflow stream from Llyn yr Adar. The lake drains to the north-west to the Nanmor valley. The catchment (157 ha) consists primarily of Ordivician slates and shales of the Glanarfon series. The backwall is composed of a large doleritic intrusion with small intrusions of fine microgranites and volcanic tuff. The catchment soils are mainly stagnopodsols and gleys, interspersed with blanket peats. The vegetation is characterised by Calluna (heather), Molinia (purple moor-grass) and Eriophorum (cotton grass), and the catchment is grazed at a low intensity by sheep. The lake and much of the catchment lie within a designated Site of Special Scientific Interest (SSSI). Llyn Llagi is classified as having high acid deposition.
Last modified
2024-05-08 16:05:47

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General Characteristics and Status
Site Status
Operational
Year Established
1988
Observed properties
Affiliation and Network Specific Information
Affiliation
ILTER✔This site is a verified "ILTER" member.
UK Upland Waters Monitoring Network✖ (UWMN_15)The affiliation of this site with "UK Upland Waters Monitoring Network" is not verified by the network on DEIMS-SDR.
LTER Europe✔This site is a verified "LTER Europe" member.
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.
UK ECN✔ (LTER_EU_UK_008)This site is a verified "UK ECN" member.
Projects
eLTER (H2020)
ICP Waters
Photos
Llyn Llagi, UK UWMN. Photo: Ewan Shilland
Llyn Llagi, UK UWMN. Photo: Ewan Shilland
Llyn Llagi, UK UWMN. Photo: Ewan Shilland
Llyn Llagi, UK UWMN. Photo: Ewan Shilland
Geographic
View in site map
Centroid/Representative Coordinates

Latitude: 53.0143 Longitude: -4.01558

Size
ca. 157.28ha
Elevation (average)
445.00msl
Elevation (min)
445.00msl
Elevation (max)
672.00msl
Related location(s)
Download

Site information [.json]

Centroid/representative coordinates [.shp] [.kml]
Bounding Box [.shp] [.kml]
Boundaries [.shp] [.kml]
GEO-BON Biome
Fresh water lakes
Biome
Fresh Water Lakes
Ecosystem Type
Lakes
Fresh Water Lakes
Small lakes
Biogeographical Region
Atlantic Bio-geographical Region
EUNIS habitat
Inland surface waters (C)
Inland surface waters (C) » Surface standing waters (C1)
Air Temperature: Average Annual
7.84°C
Precipitation Annual
2471.80mm
Geology
The catchment (157 ha) consists primarily of Ordivician slates and shales of the Glanarfon series. The backwall is composed of a large doleritic intrusion with small intrusions of fine microgranites and volcanic tuff.
Vegetation
The vegetation is characterised by Calluna (heather), Molinia (purple moor-grass) and Eriophorum (cotton grass), and the catchment is grazed at a low intensity by sheep.
Soils
The catchment soils are mainly stagnopodsols and gleys, interspersed with blanket peats.
Hydrology
Llyn Llagi occupies a north-facing corrie in the central area of the Snowdonia region of North Wales. The lake lies at 380 m beneath a steep backwall and comprises a deep, almost circular basin (maximum depth 16.5 m) bordered by an extensive shallow (1 m deep) rim. The lake covers an area of 5.67ha and the primary inflow constitutes the outflow stream from Llyn yr Adar. The lake drains to the north-west to the Nanmor valley.
Protection Level (IUCN category)
Category V – Protected Landscape/Seascape/Area
Site Type
Stationary land-based site
Design of Experimentation
no experimentation
Scale of Experimentation
beyond catchment scale
Design of Observation
only observation
Scale of Observation
plot within catchment
Permanent Power Supply
No
Equipment
Data infrastructure » Data services » Data portal
Data infrastructure » Data storage » Structured file
Data infrastructure » Data storage » Spatial data file (GIS)
Data infrastructure » Data storage » Relational database
Equipment notes
This is a remote site and access (by foot only) may be difficult in the winter. Accommodation in nearby villages.
Accessible All Year
Yes
All parts of Site Accessible
Yes
Access Type
footpath/trail
Permanent Operation
No
Operation Notes
UK UWMN freshwater monitoring is carried out at least once every three months
Site Visit Interval
120
Maintenance Interval
120
Data Policy URL
http://data.ecn.ac.uk/datapolicy.asp
LTER Site Classification
Extensive
Related Resources on DEIMS-SDR
1 dataset(s) in total:
Llyn Llagi: UK Environmental Change Network (ECN) water temperature 1998-2011
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.