Figure 2 - uploaded by Tristan Hatton-Ellis
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Proposed surface water catchment for Pant-y-Llyn (after LRG, 1998). OS base maps reproduced with permission of HMSO. Crown copyright reserved. CCW licence No. 100018813
Source publication
Pant-y Llyn is Wales’ and Britain’s only recorded Turlough. It is a key feature of Cernydd
Carmel SSSI and SAC and a groundwater dependent terrestrial ecosystem (GWDTE) that has
been identified as being at risk of significant damage from enriched groundwater input.
This investigation is a collaborative project between hydrogeologists from Environme...
Contexts in source publication
Context 1
... 1 Geological cross section showing relationship of Pant-y-Llyn to the adjacent Glangwenlais quarry and also generalised hydrogeological conditions Figure 2 Proposed surface water catchment for Pant-y-Llyn (after LRG, 1998 (adapted from Naughton et. al., 2012 No. 100018813 ................. ...
Context 2
... surface catchment of Pant-y-Llyn is likely to be principally influenced by the steep sided topography within the immediate area. LRG (1998) proposed a surface water catchment ( Figure 2), with which we are in agreement. Recharge falling in this area will reach Pant-y-Llyn rapidly. ...
Context 3
... The major ions for groundwater and Pant-y-Llyn have been plotted on a Piper diagram ( Figure 21). Only data from 2010 and 2011 was plotted as previous datasets did not include a full set of major ions. ...
Context 4
... photographs were available from 20-22/7/2000, 5/4/2006, and 11/9/2009. The extent of the turlough in 2009 (Figure 22) was digitized and compared with the other two years. ...
Context 5
... seasonal differences between the images has also affected interpretation, because the trees were leafless in April 2006 but not in 2000 and 2009. In spite of these differences, it was possible to compare the aerial images ( Figure 23, Figure 24). This showed that the turlough was significantly affected by scrub encroachment in 2000, but was open in 2006 and 2009. ...
Context 6
... is only one private sewage treatment system near Pant-y-Llyn and this is outside the surface catchment. The mains sewers do serve all of the small villages to the north and south of Pant-y-Llyn, including Carmel, Pentre Glanwenlais, and Pant-y-Llyn (Figure 25). ...
Context 7
... tracer tests show the main discharge point is the spring that feeds the Nant Gwenlais brook. We have produced a 3D 'catchment visualisation diagram' (a large scale conceptual model ) ( Figure 26) to help visualise the spatial distribution of the catchment, and the positions of monitoring boreholes and tracer tests within it. ...
