"Dampen" is the right word for it. Later this month, officials plan to release water from the Colorado River into the river's delta. It will be the first time in decades that people have released water into the delta for environmental reasons instead of, say, because a reservoir was too full, Nature News reports. Normally, the delta is mostly dry. Since the 1930s, successive dam projects have held back the river, so that folks in the U.S. and Mexico can use Colorado water for drinking, farming, and everything else.