The ECN Data Centre

Site Information: Nant Teyrn

Sponsoring organisation(s)

Cyfoeth Naturiol Cymru - Natural Resources Wales & Llywodraeth Cymru - Welsh Government

Network(s) this site belongs to
UK Environmental Change Network

Site characteristics

Altitude m

The catchment area is indicated with a black line.
Click map to enlarge.

Mean annual pH* 5.3
Mean annual discharge* 0.02 cumecs
Mean annual water temperature*
* calculated from the ECN Data Centre database
Information held about this site
View a list of datasets collected at this site
View a list of publications about this site


Nant Teyrn is a small upland stream on Yr Wyddfa/Snowdon NNR. This ECN freshwater site is co-located with the Yr Wyddfa/Snowdon terrestrial site which has been in existence since 1997. The site is on the out flow from Llyn Teyrn. The geology of the catchment is nearly all highly acidic rhyolite and dolerite with a small amount of bedded pyroclastics. Although this is a new site some of the water chemistry data is available since 1997 with discharge data collected from the weir since 2000.

Cyfoeth Naturiol Cymru - Natural Resources Wales


Related links

  • Photographic Archive of Snowdon: Each week a digital photo of Yr Wfddfa/Snowdon is taken and kept in an archive as a record of conditions at the site.



Mike Camplin

Cyfoeth Naturiol Cymru - Natural Resources Wales
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

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