| rdfs:comment
| - Stormwater, also called storm water, rainwater, or runoff, is the water from precipitation events that is not intercepted, infiltrated, evaporated, transpired, or otherwise abstracted which is released overland or into another conveyance system. Stormwater management, or SWM, is the application of retention, detention, infiltration or other measures to control the peak flow, runoff volume, or other aspects of stormwater. Typically, SWM is implemented to mitigate the effects of urbanization on a receiving system, by peak flow reduction, volumetric reduction, or quality control.
- Stormwater is a term used to describe water that originates during precipitation events. It may also be used to apply to water that originates with snowmelt or runoff water from overwatering that enters the stormwater system. Stormwater that does not soak into the ground becomes surface runoff, which either flows into surface waterways or is channeled into storm sewers.
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| abstract
| - Stormwater, also called storm water, rainwater, or runoff, is the water from precipitation events that is not intercepted, infiltrated, evaporated, transpired, or otherwise abstracted which is released overland or into another conveyance system. Stormwater management, or SWM, is the application of retention, detention, infiltration or other measures to control the peak flow, runoff volume, or other aspects of stormwater. Typically, SWM is implemented to mitigate the effects of urbanization on a receiving system, by peak flow reduction, volumetric reduction, or quality control.
- Stormwater is a term used to describe water that originates during precipitation events. It may also be used to apply to water that originates with snowmelt or runoff water from overwatering that enters the stormwater system. Stormwater that does not soak into the ground becomes surface runoff, which either flows into surface waterways or is channeled into storm sewers. Stormwater is of concern for two main issues - one related to the volume and timing of runoff water (flood control and water supplies) and the other related to potential contaminants that the water is carrying (water pollution). Because impervious surfaces (parking lots, roads, buildings, compacted soil) do not allow rain to infiltrate into the ground, more runoff is generated than in the undeveloped condition. This additional runoff can erode watercourses (streams and rivers) as well as cause flooding when the stormwater collection system is overwhelmed by the additional flow. Because the water is flushed out of the watershed during the storm event, little infiltrates the soil, replenishes groundwater, or supplies stream baseflow in dry weather. Pollutants entering surface waters during precipitation events is termed polluted runoff, and may also be labeled as nonpoint source pollution. Daily human activities result in deposition of pollutants on roads, lawns, roofs, farm fields, etc. When it rains or there is irrigation, water runs off and ultimately makes its way to a river, lake, or the ocean. While there is some attenuation of these pollutants before entering the receiving waters, the quantity of human activity results in large enough quantities of pollutants to impair these receiving waters.
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![[RDF Data]](/fct/images/sw-rdf-blue.png)