SFGTV2 October 22, 2012
As a result, the city of los angeles, in order to protect future flooding in the city, they decided to take the Los Angeles River and make it a Flood Control channel. They concreted the walls of the river 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 ...
Source: archive.org