Coastal Redwoods only exist along a narrow 500 mile
coastal strip in northern California and southern Oregon. In 1905, William and
Elizabeth Kent purchased a land full of coastal redlands to preserve its beauty
and quiet wilderness and named it after John Muir. In 1908, the Muir Woods
National Monument was donated to the government to help prevent its
destruction. The Muire Woods National Monument stands at a 295 acre land north
of San Francisco, one mile west to the City of Mill Valley.
Many of the world’s largest urban areas are supplied with water from rivers that are blocked via dams. San Francisco, California for example, gets the majority of its water supply from the Hetch Hetchy Reservoir via the Hetch Hetchy Aqueduct running from Yosemite to the San Francisco Bay Area.San Francisco’s Eight Watersheds: What is a Watershed?
A watershed is defined as the area of land that drains the water in or on it by gravity to the same receiving water body such as a river, lake or ocean. San Francisco has eight distinct watersheds – three on the west side and five on the bay side. In an urban watershed, rain runs off hardscapes (streets, rooftops, sidewalks, parking areas) flowing through catch basins, sewers, and treatment plants before being discharged to the bay or ocean.
One of the challenges in our city is that the majority of the watersheds are paved and the rain has no place to go other than the city’s combined sewer system.
The watershed-based planning approach provides an opportunity to include a mix of “grey” and “green” project solutions. The "green" above ground projects (like rain gardens and permeable pavement) can help manage and treat stormwater and provide additional social and environmental benefits to the surrounding community. The “grey” below ground projects (such as larger piper or pump stations) can improve the sewer system by providing additional capacity to store and convey stormwater.
Resources:
http://www.nps.gov/muwo/index.htm
http://sfwater.org/index.aspx?page=531
The watershed-based planning approach provides an opportunity to include a mix of “grey” and “green” project solutions. The "green" above ground projects (like rain gardens and permeable pavement) can help manage and treat stormwater and provide additional social and environmental benefits to the surrounding community. The “grey” below ground projects (such as larger piper or pump stations) can improve the sewer system by providing additional capacity to store and convey stormwater.
Resources:
http://www.nps.gov/muwo/index.htm
http://sfwater.org/index.aspx?page=531
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