The Colorado river still has water after it leaves the desert southwest region and enters the gulf of California because the river started elsewhere than in the desert, which is typically the only way streams leaving the desert have water.
From its source in Colorado and Wyoming to where it trickles toward the Gulf of California, the Colorado River and its tributaries pass through seven states in the United States as well as Mexico. However, there were negative effects; over several decades, river flows decreased. As Lake Powell grew behind Glen Canyon Dam between 1960 and 1980, the Colorado River eventually ceased to flow consistently toward the sea.
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