关键词: 城市规划;防洪减灾;防洪策略;长江上游;重庆市;

Abstract: Chongqing City is a typical mountainous riparian city in the upper reaches of Yangtze River.In recent years, due to the urban expansion along the river squeezing the flood discharge space, weak flood control engineering system, water blocking by river structures and other reasons, huge flood losses have caused widespread concerns in society.Through hydrological analysis and calculation, we clarified the flood composition and characteristics, put forward a three-step flood control strategy of building control reservoir, resettlement and river regulation and embankment construction.We calculated the effect of different regulation measures through mathematical model, and innovatively purposed the flood control idea of "expansion-retreat-retaining-storage-management" in the main urban area of Qijiang District.The results show that the purposed flood control idea can make the Qijiang District meeting the governance needs of 50-year flood control standard.The research results can provides reference for the flood control planning of upstream cities.

Key words: urban planning; flood control and disaster mitigation; flood control strategy; upper reaches of Yangtze River; Chongqing City;