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Symbol Package
A diagram illustrates the flow capacity for the Mississippi River in thousands of cubic feet per second, based on the 1956 project design flood. The Ohio river is the 200,000 square-mile eastern drainage of the Mississippi River watershed. Diagram from
Flow Capacity for the Mississippi River
Illustration of a pumping station for sewage
Water: sewage pumping station
Stormwater ditch full during heavy rains.
Stormwater ditch
Cows grazing along a stormwater ditch during heavy rains.
Stormwater ditch with cows
Stormwater trash in parking lot, in Maryland.
Stormwater trash in parking lot
Mining activities with drainage
Mine drainage
The pipes seen in this photo are called tiling. They help transfer excess water from the fields to the creek. Many areas of Old Woman Creek in the headwaters portion are very shallow streams surrounded by farm fields. This small creek area has a buffer around it and then is surrounded by fields. Ohio.
Tiling in Old Woman Creek
The pipes seen in this photo are called tiling. They help transfer excess water from the fields to the creek. Many areas of Old Woman Creek in the headwaters portion are very shallow streams surrounded by farm fields. This small creek area has a buffer around it and then is surrounded by fields. Ohio.
Tiling in Old Woman Creek
The pipes seen in this photo are called tiling. They help drain excess water from farm fields to the creek. Ohio.
Tiling in Old Woman Creek
Conceptual diagram illustrating current and historical hydrological conditions of the zones in Florida Bay.
Florida Bay hydrological conditions
Conceptual diagram illustrating the historical (left) and current (right) freshwater flows in the south Florida watershed.
South Florida historical vs. current flow regime
Alkaline chemicals are added to mitigate acid mine tailings. When water is added to the alkaline chemicals, the exothermic (heat releasing) reaction burned through the cubitainer.
Exothermic reaction
This doser times the mechanical addition of alkaline chemicals to acidic mine tailings to mitigate the acidity.
The Doser
Acidic mine tailings are being mitigated by the addition of alkaline chemicals (white), entering the stream below the wooden structure.
Acid mine tailing mitigation
Acidic mine tailings upwell here from an underground source and flow downstream overland
Acid mine tailings headwaters
Acidic mine tailings flow downstream.
Acidic mine tailings in stream
Illustration of mosquito ditches
Civil Engineering: mosquito ditches
Illustration of corrugated culvert pipe
Corrugated culvert pipe
Illustration of culvert
Culvert
Solar-powered drainage structure station, used to monitor nutrients flowing into drainage stations from surrounding fields.
Controlled drainage structure station
Drainage ditch in a agricultural field near Ruthsburg, Maryland. Ditch is being monitored by a team of scientists to see the amount of nutrients that comes off the fields.
Drainage ditch
Drainage ditch and control structure. The drainage control structure allows scientists to control the amount of drainage that goes into the ditch from the field.
Drainage ditch and control structure
Mosquito ditches and marshes on the inland side of Assateague Island, bordering Sinepuxent Bay.
Ditches in Assateague Island
Illustration of watershed management
Watershed management
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