2008
SO2128 : Nant y Gadair north slope
taken 16 years ago, 5 km ESE of Pengenffordd, Powys, Wales
Nant y Gadair north slope
The north slope, water shedding to the south, then westward before turning into the Fechan at south, of the Nant y Gadair tributary to the Grwyne Fechan, Black Mountains, 2008, illustrating the nature of rill and gully on the interbedded strata, compare the Graham Horn photograph of the Nant y Gadair valley. Emlyn Evans National Museum of Wales, MD Stagg 1978 Cambria 5.1 and these few photographs and some work derived by John Simpson, Cheltenham GCAD, are the main sources apart from some local photographs and tourist history information as at date. D Jenkins 1967 report of experts on Soils in Wales refers briefly the matter, but neither the Mid Wales soils nor the Forestry Commission Wales and certainly not the Soil Survey have carried out a report to the set standard and Geologic information (BGS) is still sparse. The general geomorphology can be read as to structures and presumed history but the terraces have as far as is known never been bored, Structural Soils worked investigations such as did the Italian drillers on montane slope to great effect, nor the sub terraces and slopes (Edward Watson 1967), clearly difficult terrain, fully analysed. It was hoped Rivers and I.H. could take over the work once established, but this and a general slack in the National Parks of Wales and the Forestry state during the recent political emphases that ran down Institute of Hydrology and Rivers Division works for physical sciences and engineers expert design, resulting in severe flooding problems nation wide (a statutory obligation required of flood control) as in Europe, other continents, and have rather left this sector reliant on local crafts and sheep farming, a tough life for the men and women who work the Black Mountains and keep it in its pristine state and far away from the policy and ideology of ADAS officers of the early 1970s, as foot and mouth testified. Forestry Wales has always been good at the work and some effort has produced a result therein, but there is drainage practice that needs review, this being a subsurface source with flood rains and melt flow addition as yet not researched unlike many Forestry standard procedures, Plynlimon, Scotland, the South West and Northumberland.
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