Theewaterskloof dam level filled to capacity as water overflows at spillway

theewaterskloof dam level capacity reservoir spillway dam wall hydro sluice architecture western cape floods cascade villiersdorp earth fill dam water supply water scarcity western cape floods flooding flooding control water level cascading overflow channel controlled release earthfill infrastructure sonderend river manmade dam waterbody static no people cape town water supply south africa drought resistance concrete fresh overflow energy engineering flow construction outdoor barrier resource drain rushing consumption structure downstream