How Los Angeles is Restoring its Ancient River System into an Urban Green Oasis

Los Angeles is the largest city in the state of California with a population of 3.8 million. The climate is classified as a Mediterranean, with hot dry summers and mild winters. Most rain occurs during the winter and early to mid spring.
However, since the 2000s, the people in Los Angeles have been affected by ever increasing droughts. The longest recorded drought in California lasted 6 years between December 2011 and ending March 2017. As the demand for water increases and as droughts continue, California's water supply has been dropping to historically low levels. California's interconnected water system serves over 30 million people and irrigates over 2,300,000 of farmland. Through a complicated web of dams, aqueducts, and pipelines which moves the water across the state, drawing from 157 million acres of land spanning across eight states. It is said to be the world's largest and most productive water system, making California’s watersheds one of the most altered on earth, which in turn has had a detrimental effect on the natural environment.
In the city of Los Angeles, groundwater represents close to one-tenth of the water supply and the majority of the city's water supply once flowed through the Los Angeles aqueduct. Now, over 50% flows through the Colorado river aqueduct, which can deliver 1 billion gallons of water per day to Southern California.
80% of the rainwater that Los Angeles receives runs out to the sea, mainly due to the impermeable surfaces of the cityscape, such as paved sidewalks and tarmac roads that allow water to rapidly drain into the flood control system, and eventually flows out into the ocean. Its estimated that around 25-30 billion gallons of stormwater from the Los Angeles river watershed is drained into the ocean each year.
Los Angeles is geographically situated in a flood plain where the Los Angeles rivers flows and before the opening of the Los Angeles aqueduct, the river was the primary source of fresh water for the city. Due to rapid industrialization in the last century the Los Angeles river became heavily polluted from agricultural and urban runoff, which has had a negative impact on the health of the residents and the environment.
However the city of Los Angeles have been turning this around in this video, we will show you how the local residents of LA city have been transforming the Los Angeles river, using natural based solutions to restore the watershed, improving the lives of hundred of thousands of people by increasing biodiversity and improving water security.
Find out more through: Friends of the LA River
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