Stormwater, also written storm water, is water that originates from precipitation (storm), including heavy rain and meltwater from hail and snow. Stormwater can soak into the soil (infiltrate) and become groundwater, be stored on depressed land surface in ponds and puddles, evaporate back into the atmosphere, or contribute to surface runoff. Most runoff is conveyed directly as surface water to nearby streams, rivers or other large water bodies without treatment.
The Anacostia River is a river in the Mid Atlantic region of the United States. It flows from Prince George's County in Maryland into Washington, D.C., where it joins with the Washington Channel and ultimately empties into the Potomac River at Buzzard Point. It is about 8.7 miles (14.0 km) long. The name "Anacostia" derives from the area's early history as Nacotchtank, a settlement of Necostan or Anacostan Native Americans on the banks of the Anacostia River.
Rock Creek is a tributary of the Potomac River, in the United States, that empties into the Atlantic Ocean via the Chesapeake Bay. The 32.6-mile (52.5 km) creek drains about 76.5 square miles (198 km2). Its final quarter-mile is affected by tides.
The Monocacy River is a free-flowing left tributary to the Potomac River, which empties into the Atlantic Ocean via the Chesapeake Bay. The river is 58.5 miles (94.1 km) long, with a drainage area of about 970 square miles (2,500 km2). It is the largest Maryland tributary to the Potomac.
Rain gardens, also called bioretention facilities, are one of a variety of practices designed to increase rain runoff reabsorption by the soil. They can also be used to treat polluted stormwater runoff. Rain gardens are designed landscape sites that reduce the flow rate, total quantity, and pollutant load of runoff from impervious urban areas like roofs, driveways, walkways, parking lots, and compacted lawn areas. Rain gardens rely on plants and natural or engineered soil medium to retain stormwater and increase the lag time of infiltration, while remediating and filtering pollutants carried by urban runoff. Rain gardens provide a method to reuse and optimize any rain that falls, reducing or avoiding the need for additional irrigation. A benefit of planting rain gardens is the consequential decrease in ambient air and water temperature, a mitigation that is especially effective in urban areas containing an abundance of impervious surfaces that absorb heat in a phenomenon known as the heat-island effect.
Cabin John Creek is a tributary stream of the Potomac River in Montgomery County, Maryland. The watershed covers an area of 26 square miles (67 km2). The headwaters of the creek originate in the city of Rockville, and the creek flows southward for 10.9 miles (17.5 km) to the Potomac River.
Johnson Creek is a 25-mile (40 km) tributary of the Willamette River in the Portland metropolitan area of the U.S. state of Oregon. Part of the drainage basin of the Columbia River, its catchment consists of 54 square miles (140 km2) of mostly urban land occupied by about 180,000 people as of 2012. Passing through the cities of Gresham, Portland, and Milwaukie, the creek flows generally west from the foothills of the Cascade Range through sediments deposited by glacial floods on a substrate of basalt. Though polluted, it is free-flowing along its main stem and provides habitat for salmon and other migrating fish.
Watts Branch is a tributary stream of the Potomac River in Montgomery County, Maryland.
Urban runoff is surface runoff of rainwater, landscape irrigation, and car washing created by urbanization. Impervious surfaces are constructed during land development. During rain, storms, and other precipitation events, these surfaces, along with rooftops, carry polluted stormwater to storm drains, instead of allowing the water to percolate through soil. This causes lowering of the water table and flooding since the amount of water that remains on the surface is greater. Most municipal storm sewer systems discharge untreated stormwater to streams, rivers, and bays. This excess water can also make its way into people's properties through basement backups and seepage through building wall and floors.
Little Seneca Creek is an 14.0-mile-long (22.5 km) stream in Montgomery County, Maryland, roughly 18 miles (29 km) northwest of Washington, D.C.
Pope Branch is a tributary stream of the Anacostia River in Washington, DC, United States. The headwaters of the stream originate near Fort Davis Drive, and the branch flows roughly northwest for about 1 mile (1.6 km) to the Anacostia, which drains to the Potomac River and the Chesapeake Bay. The watershed area of Pope Branch is about 0.4 square miles (1.0 km2).
Los Angeles County Flood Control District v. Natural Resources Defense Council, Inc., 568 U.S. 78 (2013), is a United States Supreme Court case in which the Natural Resources Defense Council and Santa Monica Baykeeper challenged the Los Angeles County Flood Control District (District) for violating the terms of its National Pollutant Discharge Elimination System (NPDES) permit as shown in water quality measurements from monitoring stations within the Los Angeles and San Gabriel Rivers. The Supreme Court, by a unanimous 9-0 vote, reversed and remanded the Ninth Circuit's ruling on the grounds that the flow of water from an improved portion of a navigable waterway into an unimproved portion of the same waterway does not qualify as a "discharge of a pollutant" under the Clean Water Act.
Stony Creek is a tributary of Black Creek in Luzerne County, Pennsylvania, in the United States. It is approximately 3.7 miles (6.0 km) long and flows through Hazle Township and West Hazleton. Its named tributaries include Cranberry Creek and Wolffs Run. Stony Creek is considered to be impaired by acid mine drainage and also has measurable concentrations of iron, aluminum, and manganese. The Llwellyn Formation and the Mauch Chunk Formation can be found near the creek. Land uses in its watershed include forested land and barren land. A reservoir has been constructed in the watershed and at least one bridge has been built over the creek. The creek is considered to be a coldwater fishery and a migratory fishery.
Six Springs Creek is a tributary of Rattlesnake Creek in Lackawanna County, Pennsylvania, in the United States. It is approximately 2.1 miles (3.4 km) long and flows through Spring Brook Township. The watershed of the creek has an area of 2.95 square miles (7.6 km2). Wild trout naturally reproduce in the creek and it is considered to be a High-Quality Coldwater Fishery. However, it has been affected by sewage contamination. The surficial geology in the creek's vicinity consists of Wisconsinan Till, bedrock, Wisconsinan Ice-Contact Stratified Drift, and wetlands.
Roaring Brook is a tributary of the Lackawanna River in Lackawanna County, Pennsylvania, in the United States. It is approximately 21 miles (34 km) long and flows through Covington Township, Madison Township, Moscow, Roaring Brook Township, Elmhurst Township, Dunmore, and Scranton. The watershed of the stream has an area of 56.3 square miles (146 km2). Its named tributaries include Little Roaring Brook, Rock Bottom Creek, White Oak Run, Van Brunt Creek, Bear Brook, and East Branch Roaring Brook. It has a high level of water quality for much of its length. However, it is affected by abandoned mining land, stormwater, and other impacts in its lower reaches. Reservoirs in the watershed include the Hollister Reservoir, the Elmhurst Reservoir, and others. The stream also flows through the Nay Aug Gorge and passes over the Nay Aug Falls, which are on the National Register of Geologic Landmarks. It flows through a concrete channel in its lower reaches. The topography of the watershed contains rolling hills in its upper reaches and the mountainous land of the Moosic Mountains in its lower reaches.
Leggetts Creek is a tributary of the Lackawanna River in Lackawanna County, Pennsylvania, in the United States. It is approximately 9.0 miles (14.5 km) long and flows through Scott Township, South Abington Township, and Scranton. The watershed of the creek has an area of 18.5 square miles (48 km2). The creek has three named tributaries: Leach Creek, Clover Hill Creek, and Summit Lake Creek. Leggetts Creek is considered to be impaired due to urban development problems, but is not affected by acid mine drainage. The creek is fairly alkaline and is a perennial stream. Its headwaters are in wetlands outside of the Lackawanna Valley and it flows through a water gap known as Leggetts Gap or The Notch. Major lakes in the watershed include the Griffin Reservoir, Summit Lake, and Maple Lake. The creek is a source of flooding in South Abington Township.
Leach Creek is a tributary of Leggetts Creek in Lackawanna County, Pennsylvania, in the United States. It is approximately 1.9 miles (3.1 km) long and flows through Scranton. The watershed of the creek has an area of 2.55 square miles (6.6 km2). The creek loses substantial amounts of water to underground mine pools. The creek is in the Coal Region and has been channelized and/or culvertized in some reaches. It flows alongside Pennsylvania Route 307 for a substantial part of its length. The creek has a riparian buffer in its upper and middle reaches, but various invasive plants grow along its banks in its lower reaches.
Wildcat Creek is a tributary of the Lackawanna River in Lackawanna County, Pennsylvania, in the United States. It is approximately 3.8 miles (6.1 km) long and flows through Archbald and Blakely. The watershed of the creek has an area of 4.49 square miles (11.6 km2). It has one named tributary, which is known as West Branch Tinklepaugh Creek. The creek may lose flow to coal measures and may receive only intermittent flow even at its source. Only the upper reaches of the creek have a natural channel. It flows through an open box culvert in its lower reaches.
South Branch Tunkhannock Creek is a tributary of Tunkhannock Creek in Lackawanna County and Wyoming County, in Pennsylvania, in the United States. It is approximately 22.5 miles (36.2 km) long and flows through Scott Township, Benton Township, North Abington Township, and La Plume Township in Lackawanna County and Clinton Township, Factoryville, and Tunkhannock Township in Wyoming County. The watershed of the creek has an area of 98.3 square miles (255 km2). The creek's named tributaries include Trout Brook, Ackerly Creek, and Kennedy Creek. South Branch Tunkhannock Creek is not designated as an impaired waterbody and has relatively good water quality.
Turkey Run is a tributary of the West Branch Susquehanna River in Lycoming County, Pennsylvania, in the United States. It is approximately 2.2 miles (3.5 km) long and flows through Clinton Township. The watershed of the stream has an area of 2.18 square miles (5.6 km2). The stream is not designated as an impaired waterbody. It is a relatively small stream and is located near State Correctional Institution – Muncy. The stream's watershed is designated as a Warmwater Fishery and a Migratory Fishery.
