Infiltration trenches: Gallery

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  Trench laid in advance of the surrounding catchment being finished. This system would benefit from some geotextile on the surface to prevent sediment from accumulating before the asphalt is laid.

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  Good use of geotextile, being limited to preventing fines from entering the trench from above.

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  View of infiltration trench in U.S. Photo credit: Moreau1

The land draining to a single reference point (usually a structural BMP); similar to a subwatershed, but on a smaller scale.

Filter fabric that is installed to separate dissimilar soils and provide runoff filtration and contaminant removal benefits while maintaining a suitable rate of flow; may be used to prevent fine-textured soil from entering a coarse granular bed, or to prevent coarse granular from being compressed into underlying finer-textured soils.

Soil, sand and minerals washed from land into water, usually after rain. They pile up in reservoirs, rivers and harbors, destroying fish-nesting areas and holes of water animals and cloud the water so that needed sunlight might not reach aquatic plans. Careless farming, mining and building activities will expose sediment materials, allowing them to be washed off the land after rainfalls.

A mixture of mineral aggregates bound with bituminous materials, used in the construction and maintenance of paved surfaces.

Soil particles with a diameter less than 0.050 mm.