Search results
Results from the WOW.Com Content Network
Impervious surface percentage in various cities. The percentage imperviousness, commonly referred to as PIMP in calculations, is an important factor when considering drainage of water. It is calculated by measuring the percentage of a catchment area which is made up of impervious surfaces such as roads, roofs and other paved surfaces.
The capture ratio is the ratio of the rain garden's area to the impervious area that drains onto it. Rain garden in the Allen Centennial Gardens on the campus of the University of Wisconsin-Madison GreenRoof: Green roofs are another variation of a bio-retention cell that have a soil layer laying atop a special drainage mat material that conveys ...
A stormwater fee is a charge imposed on real estate owners for pollution in stormwater drainage from impervious surface runoff.. This system imposes a tax that is proportional to the total impervious area on a particular property, including concrete or asphalt driveways and roofs, that do not allow rain to infiltrate.
Storm drain grate on a street in Warsaw, Poland Storm drain with its pipe visible beneath it due to construction work. A storm drain, storm sewer (United Kingdom, U.S. and Canada), highway drain, [1] surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand) is infrastructure designed to drain excess rain and ground water from impervious surfaces such as paved ...
A vector channel representation is employed. Parameterization utilizes digital data sets at any resolution, including LIDAR terrain data and other digital maps of impervious area, soils, and land use/cover. Vflo is developed to utilize multi-sensor inputs from radar, satellites, rain gauges, or model forecasts.
Flooded streets in New Orleans Relationship between impervious surfaces and surface runoff Urban runoff is a major cause of urban flooding , the inundation of land or property in a built-up environment caused by rainfall overwhelming the capacity of drainage systems , such as storm sewers . [ 12 ]
HIV deaths continue to fall in 21st century. It took decades to reach current strides in HIV care, largely due to early public health failures. The first U.S. cases of AIDS emerged in 1981, though ...
In the 773-acre (313 ha) creek basin, 71% of the land has an impervious surface (roads and parking lots). [5] The lake is named for settler Clark Merrill Sturtevant, a United States Civil War veteran who homesteaded there in 1872. [3] Tracks for the Northern Pacific Railroad passing near the lake were laid in 1904. [6]