Joe the area Ranger in the Brecon Beacons contacted Paul and my self today. He has a bit of a problem, which is quite a big land slide in the southern Beacons in Nant Ddu to be specific. The issue at this site is that Nant Ddu feeds water which will become drinking water for Cardiff via a lot of Dwr Cymru infrastructure and they would prefer the water not to be red and full of sediment. We are looking to suggest a more natural approach for stabilsiation (less infrastructure and machines in this area) But this got me thinking. If like they say we have drier summers and wetter winters then our landscapes will change. The slopes of our valleys are the angle they are because they have sort of equalised to the type of rainfall pattern we have. Heavier and more concentrated rain and then change will come. Land slides are a natural feature of our landscapes but will the frequency increase? (one winter does not a re-modeled landscape make!) Will our famous V shapes valleys change in nature to adapt to the changing climate and its changing rainfall pattern? answers on a post card please!
Yes grazing patterns, vegetation cover, mineral pans, drainage and so on have an impact in accelerating the flow of water. But weeks and weeks of heavy rain also has an impact? Makes you think if all that bracken in the image were covered with trees how would the soil have tolerated the rain better?