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Stormwater Open Watercourses(OWC):rivers identification information.The status of the official Open Watercourse layer is representative of natural and built river systems, which integrates surface stormwater runoff into underground urban drainage reticulation, from upstream mountain intakes to coastal outfalls. Rain-water is routed along natural flow paths, via environmental wetland eco-systems and artificial storm detention/retention depressions, through existing streams and tributaries of the bulk open natural and built-infrastructure river systems. The Open Watercourses are intercepted by Inlet-Outlet infrastructure, which deposits stormwater urban runoff into underground stormwater drainage reticulation networks, then converges with the road drainage runoff taken into catchpits from road surface channels into the underground reticulation, by means of the above open/closed systems, towards coastal outfalls.(OWC: spatial vector / non-spatial (attribute or tabular) / spatial extents)Open Watercourse river reaches are comprised of feature types such as Natural Rivers, Streams, Channels, Canals, Overland Flow Paths/Gap Connectors and Stream Extensions.The spatial coverage of Open Watercourses of the greater Cape Town Drainage Catchment area includes all rivers within the catchments, which drain into but also extend outside the Cape Town metro area. |