A large percentage of the catchment s surface inlet pits have been modified to trap odours, sediment and litter. The main landuse is business, including representation by sectors including retail, finance, tourism, and entertainment. Residential landuse is located mainly in the western part of the catchment, and includes Pyrmont, The Rocks, Ultimo and Miller s Point. Some of the oldest residential development within Sydney is located within this catchment at Millers Point. The main areas of open space are located to the east of the catchment and these include Hyde Park, The Domain and Royal Botanic Gardens.
Observatory Park is located within The Rocks.
Industrial landuses can be found adjacent to Johnstons Bay, and special landuses around Darling Harbour and sections of Pyrmont. Stormwater run-off from the Blackwattle Bay Catchment is conveyed by the major drains along Wattle Street, Mountain St, Bay St and Wentworth Park Rd before discharging into Blackwattle Bay near the Fish Markets. Map - Click here to view an aerial photo of the city marked with catchment boundaries, City of Sydney boundaries, stormwater drainage and major stormwater drainage discharge points. For more specific catchment information, refer to the Port Jackson South Catchment Stormwater Management Plan.