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What is a Watershed


A watershed is an area of land where all of the water that drains on the land or below the land empties to a particular body of water. They can be large or small. The Great Lakes Watershed, also called the Great Lakes Basin, drains water from eight states and one Canadian province.

Tonawanda Creek watershed

An example of a smaller watershed, sometimes called a sub-watershed, is the Tonawanda Creek watershed. The Tonawanda Creek Watershed Committee  is a group of concerned citizens and stakeholders working together to protect the area of land that drains to Tonawanda Creek. This watershed, shown in green in the photo above, has many of the same issues and features as a watershed that is larger in size. For instance. did you know that:

  • The invasive species, hydrilla has been found in Tonawanda Creek and can be transported to other waterways by watercraft or waterfowl;
  • Erosion of stream banks has caused roads and homes to slide into the creek;
  • Log jams and debris build-up sometimes cause flooding, especially in the flat areas;
  • There are many fishing opportunities in the streams that flow in the watershed;
  • Several beautiful waterfalls exist as an example of the geology of the region;
  • The Creek is a source of drinking water for Batavia;
  • There are both agricultural/rural areas as well as suburban/urban areas in the watershed, and;
  • Swamps in the area offer excellent wildlife viewing.

Join us for the Tonawanda Creek Watershed Bus Tour on August 23, 2014!

Tonawanda Creek is one of the largest watershed areas in Western New York, comprised of 405,606 acres or 648 square miles, and is approximately 101 miles long. The drainage basin of Tonawanda Creek includes portions of Wyoming, Genesee, Niagara and Erie Counties, and the Tonawanda Seneca Nation.

Its headwaters start in the Town of Wethersfield, Wyoming County where the elevation is more than 1,800 feet. The Creek flows northward from Wyoming County to Batavia where it turns west and continues its flow along the boundary of Erie and Niagara Counties until it reaches the Niagara River in the cities of Tonawanda and North Tonawanda. The Barge Canal is also a part of Tonawanda Creek from approximately Hopkins Road in Amherst to the Niagara River.  Cultivated land represents 45% of the land use in the watershed while, forests comprise 27% and wetlands 11%.