Research Paper

activity Agrostis tenuis anthropogenic ASKERN basal gully Blaenavon Blaenavon area coal coal-spoil coarse discard Colliery spoil mounds concavity Cwmavon disturbance downslope dumps effect Erosion Grid erosion pins established experiments facing slopes fan-ridge Figure Garn-yr-erw GEDLING geomorphology graphs grid row ground advance ground retreat ground surface gully channel gully control increase interfluve Kay's Slope land reclamation landforms Llanelly Hill loose-tipped lower slopes MacClane Shute main slope maximum slope angle meters Milfraen N. E. million tons mms p. a. morphological morphometric opencast particles Photograph processes Rainfall Intensity retreat recorded rill runoff Schumm sediment shale sheet-flood slope development slope element slope evolution slope foot slope profile slope units soil creep soil crust soil loss soil surface solifluction South Wales spoil banks spoil cones spoil tip Spoil Tip Complex studies surface runoff tend terracettes tion trampling turf unvegetated slopes upper convexity upper slope upslope Vegetal Cover Waun Hoscyn Waunafon