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| Geography of Taipei | |
|---|---|
| Name | Taipei |
| Native name | 臺北市 |
| Country | Republic of China (Taiwan) |
| Region | Northern Taiwan |
| Coordinates | 25°02′N 121°38′E |
| Area km2 | 271.8 |
| Population | 2.6 million |
Geography of Taipei
Taipei is the capital city of the Republic of China (Taiwan), situated in northern Taiwan (island) where the Tamsui River drainage meets the Taiwan Strait. The municipality lies at the northern end of the Taiwan Basin, bordered by the Yangmingshan National Park volcanic range and adjacent to New Taipei City and Keelung. Taipei functions as a regional hub connecting the Port of Keelung, Taiwan High Speed Rail, and the Taipei Metro network.
Taipei occupies the northern portion of the Taiwan Basin at approximately 25°N, 121°E, and covers the districts clustered in the Taipei Basin including Datong District, Zhongshan District, Zhongzheng District, Songshan District, and Da’an District. The municipality is surrounded by the mountainous districts of Shilin District and Beitou District at the fringe of Yangmingshan National Park and shares borders with New Taipei City municipalities such as Banqiao District and Xindian District. Taipei’s position at the confluence of the Keelung River and Xindian River defines its extent toward the Tamsui River estuary and the approaches to the Taiwan Strait shipping lanes.
Taipei sits primarily within the low-lying Taipei Basin, an alluvial plain formed by the Keelung River, Tonghui River, and Tamsui River systems. Rolling hills of the Yangmingshan volcanic complex rise to the north and northeast, featuring peaks such as Qixing Mountain, while the Guanyinshan massif marks the basin’s northwest margin. The basin floor hosts terraces, floodplains, and reclaimed wetlands near the Tamsui River estuary adjacent to Bali District and Tamsui District. Urban landforms include river terraces altered by infrastructure such as the MacArthur 1st Bridge and the Dazhi Bridge crossings.
Taipei has a humid subtropical climate classified under the Köppen climate classification as Cfa, with hot, wet summers influenced by the East Asian monsoon and typhoons from the Western Pacific basin, and mild winters moderated by the Kuroshio Current. Seasonal weather patterns include plum-rain from the Baiu front and heavy summer precipitation associated with approach of Typhoon Soudelor-type systems. Local climate modulation arises from orographic effects of Yangmingshan National Park and urban heat island impacts observed in central districts like Xinyi District and Zhongzheng District.
Taipei’s fluvial network centers on the Tamsui River and principal tributaries: the Keelung River and the Xindian River (also called the Sindian River), with smaller streams like the Dahan Creek and the Beishi River influencing watershed dynamics. Flood control infrastructure includes levees, retention basins, and the Feitsui Reservoir upstream in New Taipei City supplying water to the metropolitan area alongside the Zhoumiao Pumping Station and the Beitou Hot Spring thermal groundwater zones. Historic flood events tied to typhoons prompted engineering works such as the Tamsui River Flood Diversion Project and river channelization carried out by the Water Resources Agency (Taiwan).
Taipei rests on Quaternary alluvium overlying uplifted sedimentary and volcanic rocks related to the Philippine Sea Plate–Eurasian Plate convergence that shapes the Taiwan orogeny. Bedrock exposures in Yangmingshan show andesites and fumarolic alteration linked to the Tatun Volcano Group and geothermal fields including Beitou Hot Spring. Seismicity from the 2016 Taiwan earthquakes and historic events such as the 1999 Jiji earthquake highlight earthquake risk; liquefaction vulnerability affects low-lying districts near former wetlands. Typhoon-induced flooding, slope failures on hillsides near Shilin District, and coastal erosion along the Taiwan Strait are recurrent hazards managed by the Central Weather Administration and municipal agencies.
Vegetation zones transition from urban parks and street trees—species introduced and preserved in green spaces like Daan Forest Park and Taipei Botanical Garden—to native subtropical montane flora in Yangmingshan National Park with rhododendrons, Taiwanese red cypress relatives, and bamboo groves. Faunal assemblages include passerine birds observed at Guandu Nature Park and migratory waterfowl on the Tamsui River estuary, mammals such as Formosan macaque populations in higher elevations, and endemic amphibians recorded in montane streams. Conservation efforts involve the Taipei Zoo ex-situ programs and protected areas governed by the Taiwan Forestry Bureau.
Taipei’s urban fabric integrates high-density districts with mixed commercial cores such as Xinyi District—home to Taipei 101—alongside administrative centers in Zhongzheng District housing institutions like the Presidential Office Building and cultural sites including the National Palace Museum and Chiang Kai-shek Memorial Hall. Land use patterns reflect transit-oriented development around Taipei Main Station and Songshan Airport, along corridors served by the Taipei Metro and arterial roads like Civic Boulevard. Peripheral districts include industrial parks in Neihu District and emerging technology clusters near Nangang Software Park, while brownfield redevelopment and river revitalization projects such as the Riverside Park System aim to reconnect the city to riparian landscapes.