SFGTV2 January 5, 2013
In order for water to get to ocean much faster. Narrator cities throughout Southern California converted natural rivers to these concrete channels, part of their storm drain systems. This allowed expanding Development Without the need for large flood plains. Kharaghani the Los Angeles River is approximately 51 miles. Concrete reduces the size of the river that you need to carry the water because it speeds up the flow of water. If youd like to remove all the concrete and to have natural system to...
Source: archive.org