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| Glossary » C |
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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 CCapacity building program: A holistic approach to knowledge building and transfer, which fosters skill development, competency, innovation and confidence. It is also a means to facilitate network building, linkages and training for continuous improvement. Catchment: A topographically defined area draining surface water to a single outlet point. Channel: The bed and banks of a stream or constructed drain (ARMCANZ & ANZECC 2000) that carries all flows except floods. Clay (soils): A fine-grained mineral soil consisting of particles less than 0.002 mm in equivalent diameter (Charman & Murphy 1991). Colloids: Fine abiotic and biotic particles of typically 0.1 µm to 1 nm in diameter (ARMCANZ & ANZECC 2000). Compaction: Any process whereby the density of soils is increased. This process results in lower permeability and poorer soil aeration. (Charman & Murphy 1991.) Constructed wetland: A vegetated detention area designed and built to remove contaminants from stormwater runoff, but which can also provide secondary benefits of habitat enhancement/creation and active and passive recreational and educational opportunities. Contaminant: A substance that presents or has the potential to present a risk of harm to human health, the environment or any environmental value (Department of Environment and Conservation 2006). Controlled groundwater level (CGL): The controlled (i.e. modified) groundwater level (measured in metres Australian Height Datum) at which drainage inverts are set. Conveyance systems: A mechanism for transporting stormwater from one point to another, including swales, bioretention systems, living streams, pipes and channels. |
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