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| Glossary ยป O |
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GlossaryThis glossary is copied from the Stormwater Manual of Western Australia Chapter 11: Further Information. References are available from this chapter. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z OObjectives: Specific statements about what a project intends to achieve. Offline: A management system located adjacent to but off a stream or major flow pathway, such as to treat low flows or the discharge of a major flow system (ARMCANZ & ANZECC 2000). Oil trap/separators: A stilling tank configured to separate lighter oily matter, scums and hydrocarbons from stormwater. Online: A management system located within the original stream or flow pathway/drainage channel to treat event flows (ARMCANZ & ANZECC 2000). On-site and off-site: On-site facilities are located on individual lots to enhance local stormwater retention/detention and interception of contaminants. Off-site facilities are located on stormwater networks to provide area-wide stormwater retention/detention and interception of contaminants. (Adapted from ARMCANZ & ANZECC 2000.) Outcomes: The results of the activities or products of a project (Woodhill & Robins 1998). All the impacts or consequences of the project beyond its outputs (see ’outputs’). Outcomes are often delayed or long term and they may be intended or unanticipated (Bullen undated). Outlet: Point of water discharge from a waterway or stormwater structural control. Outputs: The activities completed or products made during a project (Woodhill & Robins 1998). Outputs are within the direct control of the project. Overland flow: The component of rainfall (excess) that is not removed by infiltration or use and discharges down-gradient as surface flow (ARMCANZ & ANZECC 2000). |
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