Controlling Excess Rainwater With Stormwater Bmp
Do you ever wonder where all that water goes when it rains
? When it rains, especially when theres a hurricane, where does all that water go, and how do we get clean water out of it? The answers lie in the water management system.
When rain falls to the ground, it can either be absorbed by the surface or carried along rooftops, roads, parking lots or sidewalks, or evaporated in varying amounts depending on surface conditions. If rain falls on natural ground cover, like soil and earth, most of the water is absorbed by the ground and some of it evaporates. Very little of it turns into run off.
On the other hand, if rain falls on impervious surfaces such as roads or rooftops, only a small amount of water is soaked into the ground. Most of the excess water runs off into the citys water and sewer systems, while some of the water evaporates into the atmosphere. The same is true for other forms of precipitation such as hale or snow melting. This is where BMPs or best management practices play an important role in controlling the quantity and the quality of water that originates from precipitation.
Best management practices not only refer to engineered or structural devices such as filters or retention ponds, but also to operational and procedural practices. The general purpose is to treat polluted water, but is not limited to that. A more targeted form of water control is known as
stormwater BMP.
Stormwater BMP, specifically, is the term that refers to devices to practices that manage the amount and the quality of water that is produced by rain or other forms of precipitation. These structural devices and operational practices are used for a multitude of purposes, such as controlling flooding and soil erosion, construction of stormwater systems that remove contaminants or managing hazardous material in order to prevent environmental pollution.
The Environmental Protection Agency is the branch of the United States government tasked to regulate stormwater, according to the Clean Water Act of 1972. Its the EPAs objective to clean up our waters, and return them to its original life-sustaining condition. That objective is slowly becoming a reality thanks to the implementation of
stormwater BMPs.
by: Chris Cole
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