Where does the Rio Grande get its water?

Although snowmelt from the San Juan Mountains of Colorado (Fig. 7) is a major source of water for the Rio Grande, runoff from northern Mexico also contributes to its flow. As in all arid to semiarid regions, the waters of the Rio Grande River are highly sought after and overallocated.



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Key Facts & Information
  • The Rio Grande is the fifth longest river in North America (1,900 miles).
  • It forms a border between Texas and Mexico.
  • The Rio Grande begins in the Rocky Mountains and flows into the Gulf of Mexico in the south.
  • The watershed of the Rio Grande is approximately 335,000 square miles.


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Today, the 20th-longest river in the world is also one of the ten most endangered. The Rio Grande is still vital to its communities and visitors: agriculture, mining, and recreation are the three top industries along this river and form the base of our local economy. It's our responsibility to keep it thriving!

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Mexican fishermen captured a 7.5-foot crocodile in the Rio Grande, the river that divides part of Mexico and the United States, authorities reported on Sunday. Mexican fishermen captured a 7.5-foot crocodile in the Rio Grande, the river that divides part of Mexico and the United States, authorities reported on Sunday.

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Here are the five most polluted rivers in the world.
  • Ganges River, India: The Ganges River is a highly revered waterbody among Hindus. ...
  • Citarum River, Indonesia: The Citarum River in Indonesia is the second most polluted river in the world. ...
  • The Buriganga River. ...
  • Yellow River, China: ...
  • Mississippi River, United States:


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