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snippet:
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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. |
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summary:
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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. |
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accessInformation:
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(OWC: spatial data representation / data quality / distribution information) GIS capture of Cape Town River centerlines within CMA Drainage Catchment were undertaken over a series of projects as follows: Project Phase1: Initial capture of Rivers (and Water Bodies) GIS Layer Name: Rivers99arcs and Water bodies Rivers99poly Description: River centre lines and waterbody polygons Source Data: une 1998, 1: 10 000 aerial photography with accuracy of 1: 1000 scale Consultant: CCT GIS IS Department Date: Jun 1999 – Jun 2000 Project Phase2-A: Cape Metropolitan Area (CMA) Primary Catchment Boundary Delineation. GIS Layer Name: cma_delstr Description: Indication of surface water drainage patterns for the CMA to assist heads-up digitizing of drainage channels Source Data: 25m DTM Consultant: Earthdata International PTY.Ltd. Date: Feb.2000 Project Phases: Series of individual projects followed per river catchment area “xx” GIS Layer Names: i.e. (xx_rivcl_w84) Description: River centre lines Source Data: 1998 aerial photography Consultant: Various Date: Aug 2001 Project (Current): CSRM Geodatabase GIS Layer Name: Open Watercourses Description: Collation of latest available source data from all previous projects. Source Data: Integrated Urban Drainage(2003); cmarivs1_w84(2004); CMD_RIVcl_Update_07 (primary data sources) Consultant: SRK Consulting/GISCOE in Joint Venture. Date: Aug 2012 (Note: SRK Consulting Engs.&GISCOE appointed consultants, recommended metadata be placed at date of completion of CSRM Geodatabase project on 14Aug.2012 due to sketchy metadata source data origins) |
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description:
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(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. |
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licenseInfo:
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(OWC: data quality / distribution information)DISCLAIMER: Council does not accept responsibility for any errors or omissions in the data and will not be liable for any claims whatsoever, whether for damages or otherwise, which may arise as a result of inaccuracies in the information supplied. All engineering infrastructure locations are an indication of approximate spatial alignment and needs to be verified and confirmed in the field prior to any planning or construction, and also to immediately bring any discrepancies/anomalies to the attention of the Water and Sanitation department’s Catchment & Stormwater Management branch. The onus is on the developer/consultant, in conjunction with the relevant services department, to check the reliability of existing infrastructure and to obtain approval for any development planning from the Area Engineer.(Public, CCT Users, GIS Users, WEB Services, Intranet Users. It is incumbent upon users to check regularly whether the data has been updated. Please report back errors in the data) |
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title:
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rgdb.LDR.SL_STW_OWC |
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culture:
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en-ZA |
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