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From Glen Canyon Dam AMP
File:San juan river entrenched meanders.jpg
The San Juan River near Mexican Hat, Utah
File:Mineral-Bottom.jpg
The Green River at Mineral Bottom, just north of Canyonlands National Park
Template:Main The Colorado is joined by over 25 significant tributaries, of which the Green River is the largest by both length and discharge. The Green takes drainage from the Wind River Range of west-central Wyoming, from Utah's Uinta Mountains, and from the Rockies of northwestern Colorado.<ref>Template:Cite web</ref> The Gila River is the second longest and drains a greater area than the Green,<ref name="USGSbasins"/> but has a significantly lower flow because of a more arid climate and larger diversions for irrigation and cities.Template:Sfn Both the Gunnison and San Juan rivers, which derive most of their water from Rocky Mountains snowmelt, contribute more water than the Gila did naturally.Template:Sfn
| Statistics of the Colorado's longest tributaries | ||||||||
|---|---|---|---|---|---|---|---|---|
| Name | State | Length | Watershed | Discharge | References | |||
| mi | km | mi2 | km2 | cfs | m3/s | |||
| Green River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSbasins"/><ref>Template:Cite web</ref><ref name="Greendischarge">Template:Cite web</ref><ref group="n">Discharge data is for Green River, Utah, Template:Convert upstream from the mouth. The stream gauge here measures flow from an area of Template:Convert, representing about 93.2 percent of the basin.<ref name="Greendischarge"/></ref> | |||
| Gila River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSrivers"/><ref name="USGSbasins"/><ref name="Giladischarge">Template:Cite web</ref><ref group="n">Before large irrigation and municipal diversions, the Gila River discharged about Template:Convert per year,Template:Sfn equating a flow of nearly Template:Convert.</ref> | |||
| San Juan River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSbasins"/><ref name="NHD">The National Map. U.S. Geological Survey. Accessed February 25, 2012</ref><ref name="SJdischarge">Template:Cite web</ref><ref group="n">Discharge data is for Bluff, Utah, located about Template:Convert above the confluence with the Colorado. The gauge measures flow from an area of Template:Convert, about 93.5 percent of the basin.<ref name="SJdischarge"/></ref> | |||
| Little Colorado River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSbasins"/><ref>Template:Cite web</ref><ref name="LCdischarge">Template:Cite web</ref> | |||
| Dolores River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSbasins"/>Template:Sfn<ref>Template:Cite web</ref> | |||
| Gunnison River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSbasins"/><ref name="NHD"/><ref>Template:Cite web</ref> | |||
| Virgin River | Template:Flag | Template:Convert | Template:Convert | Template:Convert | <ref name="USGSbasins"/>Template:Sfn<ref name="Virgindischarge">Template:Cite web</ref><ref group="n">Discharge data is for Littlefield, Arizona, about Template:Convert from the confluence with the Colorado, and also upstream of the confluence with its major tributary, the Muddy River. The gauge measures flow from an area of Template:Convert, about 39.1 percent of the total basin.<ref name="Virgindischarge"/></ref> | |||
