Bioswales - USDA

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BioswalesWhat are Bioswales ? Bioswales are storm water runoff conveyance sys-tems that provide an alternative to storm can absorb low flows or carry runoff fromheavy rains to storm sewer inlets or directly to sur-face waters. Bioswales improve water quality byinfiltrating the first flush of storm water runoff andfiltering the large storm flows they majority of annual precipitation comes fromfrequent, small rain events. Much of the value ofbioswales comes from infiltrating and filteringnearly all of this a bioswaleFor best results, enhance and utilize existing natu-ral drainage swales whenever possible.

•Avoid soil compaction during instal-lation. •Swales should be sized to convey at least a 10-year storm (or about 4.3 inches in 24 hours). Bioswales Bioswales A road ditch can serve as a bioswale.The rock trench and wetland vegetation are

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