• Denver
  • ngapa  county (in tibetan )

Denver (/ˈdɛnvər/) is a consolidated city and county, the capital, and most populous city of the U.S. state of Colorado. Its population was 715,522 at the 2020 census, a 19.22% increase since 2010. It is the 19th-most populous city in the United States and the fifth most populous state capital. It is the principal city of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the first city of the Front Range Urban Corridor.

Denver is located in the Western United States, in the South Platte River Valley on the western edge of the High Plains just east of the Front Range of the Rocky Mountains. Its downtown district is immediately east of the confluence of Cherry Creek and the South Platte River, approximately 12 miles (19 kilometres) east of the foothills of the Rocky Mountains. It is named after James W. Denver, a governor of the Kansas Territory. It is nicknamed the Mile High City because its official elevation is exactly one mile (5280 feet or 1609.344 meters) above sea level.[a] The 105th meridian west of Greenwich, the longitudinal reference for the Mountain Time Zone, passes directly through Denver Union Station.

Denver is ranked as a Beta world city by the Globalization and World Cities Research Network. The 10-county Denver-Aurora-Lakewood, CO Metropolitan Statistical Area had a population of 2,963,821 at the 2020 United States census, making it the 19th most populous U.S. metropolitan statistical area. The 12-county Denver-Aurora, CO Combined Statistical Area had a population of 3,623,560 at the 2020 United States census, making it the 17th most populous U.S. primary statistical area. Denver is the most populous city of the 18-county Front Range Urban Corridor, an oblong urban region stretching across two states with a population of 5,055,344 at the 2020 United States Census. Its metropolitan area is the most populous metropolitan area within a 560-mile (900 km) radius and the second most populous city in the Mountain West after Phoenix, Arizona. In 2016, it was named the best place to live in the United States by U.S. News & World Report.

Aba County is located on the southeast edge of the Qinghai-Tibet Plateau, at the confluence of Sichuan, Gansu and Qinghai provinces, bordering Ruoergai County, Hongyuan County, Malkang County, Rangtang County and Maqu County of Gansu Province, Jiuzhi County of Qinghai Province, and Banma County. It is an important transportation hub from the mainland to the northwest, an important trade center and material distribution center, and a county dominated by animal husbandry with both agriculture, animal husbandry and forestry. it is a typical old, small, border, poor and sick area. The topography of the county is complex, the terrain gradually inclines from northwest to southeast, the county seat is 3290 meters above sea level, the highest elevation is 5154 meters above sea level, and the lowest elevation is 2936 meters above sea level. The runoff belongs to the Yangtze River and Yellow River systems, belongs to the semi-humid monsoon climate in the cold temperate zone of the plateau, and there is no obvious difference between the four seasons, the temperature difference between day and night is large, the frost-free period is short, the solar radiation is strong, and the average annual temperature is 4 ℃. Aba County in 1951
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