National Geographic : 2000 Oct
A River's Salty End Tapped by human need, the Colorado River meanders through a wide delta in Mexico before it empties into the Gulf of California. Farms and cities upstream in seven U.S. states have claimed most of its water for uses such as irrigation, sanitation, and swim ming pools. At this point, only miles from the gulf, the channel is full of high-tide sea water. What was once a fertile wetland along its banks is now dry and encrusted with salt.