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嘉陵江(包括渠江和涪江),是长江的主要支流之一。主流发源于陕西凤县东北秦岭山中,西南流,与源自甘肃天水县的西汉水会合后,入四川境.更南流,又接纳很多支流,最后至合川,两个最大支流——左为渠江,右为涪江——在此先后汇入主流,流域面积于是骤增一倍,然后继续南流,于重庆注入长江。嘉陵江主流和它的几条大支流渠江涪江等的上游,都是暴雨中心,古有“巴山夜雨涨秋池”之詠,足见这里的降雨是有名的。加之山区地势陡峻,迳流集中得快,因此山洪暴发成灾,史册累有
Jialing River (including Drainage River and Fujiang River) is one of the major tributaries of the Yangtze River. The mainstream originated in Qinling Mountains in northeastern Shaanxi Fengxian mountains, southwest flow, and the West Han River from Tianshui County, Gansu Province after the merger, into the Sichuan territory. More south, but also admits many tributaries, and finally to Hechuan, the two largest tributaries - the left is Qujiang River, to the right of Fujiang River - in this have been merged into the mainstream, the basin area then doubled, and then continue south, infusing the Yangtze River in Chongqing. The mainstream of the Jialing River and its several major tributaries of the upper reaches of the river, such as the Fujiang River, are all heavy rain centers, and the ancient “Wing of the Pool at Night Falls in the Autumn Pool” shows that the rainfall here is famous. Coupled with the steep terrain in the mountainous areas, Yan stream concentrated quickly, so the flash flood disaster, the history of accumulation