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what is the relationsihp of the gila river and the salt river - Google Search The Salt River passes through Tempe and Phoenix before the confluence with the Gila River. The Salt River is the largest tributary of the Gila River, with the two rivers combining southwest of Phoenix, Arizona. Near Phoenix, the Gila River flows from the southeast; and the Salt River flows from the east near the border of Scottsdale and Tempe, Arizona. While the Gila River flows westward across southern Arizona, the Salt River flows westward from the White Mountains in Arizona, providing a significant volume of water that feeds the Gila River. The Salt River is the more dominant river upstream in Tempe and east Phoenix before the confluence.  Successful searching here with a variety of sources, including Britannica, Wikipedia,  and Audobon Southwest.

why is it colder in Flagstaff than Phoenix - Google Search Flagstaff is colder than Phoenix primarily because of elevation. Flagstaff's elevation is about 7,000 feet Phoenix's elevation is about 1,000 feet. Colder air settles in Flagstaff, bringing lower temperatures, more snow, and distinct seasons. Phoenix is located in a desert valley. Air is less dense at higher elevations, cools down more efficiently, especially at night, creating a significant temperature difference.