What feeds the Rio Grande?

Several major drainages feed into the Rio Grande. Predominant surface water features that feed into the Rio Grande above the Otowi gage, in the Upper Rio Grande are the Red River, Rio Hondo, Pueblo de Taos, Santa Barbara, Embudo Creek, and the Rio Chama.



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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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Who owns the Rio Grande in Texas? The United States and Mexico share the waters of the Rio Grande. The U.S.-Mexico border lies in the middle of the river from El Paso and Ju?rez to its delta at the Gulf of Mexico east of Brownsville and Matamoros in South Texas. In Mexico, the federal government owns the river water.

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1830s: The river becomes the center of the border dispute between South Texas and Mexico. It then transforms into a common escape route for Texan slaves after Mexico abolished slavery in 1828. 1884: The Rio Grande officially becomes the border between Mexico and the US.

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At the river's headwaters, the water is “pristine,” Ganjegunte said. By the time the river reaches El Paso, the salinity of the water is above 1,000 parts per million. Water above 1,000 parts per million is no longer considered freshwater and, while still safe to drink, is above secondary drinking water standards.

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The Rio Grande aquifer system is the principal aquifer in a 70,000-square-mile area of southern Colorado, central New Mexico, and western Texas (fig. 52).

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In south-central Colorado, the Rio Grande, its tributaries and the water flowing underground supports communities across the San Luis Valley, an 8,000 square-mile high elevation desert that sees less than seven inches of precipitation per year.

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The name Río Grande means great river in Spanish. The source of the Río Grande is in the San Juan Mountains in Colorado. It flows through the U.S. states of Colorado and New Mexico, and Texas, and forms the border between Texas and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas.

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