For this case study we have selected the central area of Taipei, comprising an area of 120km2 with 1.7 million inhabitants. 

The Tropic of Cancer runs straight through the middle of Taiwan bringing with it tropical and subtropical weather. Taiwan experiences weather similar to Yunnan, Guangxi and Guangdong provinces. It typically presents an average temperature of 22℃ (71.6℉) all year round. There is no severe cold in winter and no brutal summer heat. The average annual rainfall is measured at 2950mm.

Taiwan is a humid region. The northern part, middle mountain area and western plain are abundant with rainfalls in different periods. June to October is the typhoon season in Taiwan.

Typhoons normally occur 3 to 4 times per year, delivering approximately 100mm rainfall per hour. The last extreme typhoon occurred in 2001 with total rainfall of 1000mm and intensity of 100 mm/h.  Total economic losses in that 2001 storm were estimated at 1 billion Euros.

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