2009年,京杭大运河正式登上了方寸之地,使人们第一次对它有了一个总体的了解。大运河是世界上开凿最早、最长的人工河,起自浙江杭州,终于北京,全程穿越浙、苏、鲁、冀、津、京四省二市,沟通了钱塘、长、淮、黄、海五大水系,全长达1794公里(图1)。 In 2009, the Beijing-Hangzhou Grand Canal officially boarded the square, making it the first time that people had a general understanding of it. The Grand Canal is the earliest and longest man-made river in the world. Starting from Hangzhou in Zhejiang Province and finally in Beijing, the Grand Canal crosses the two cities of Zhejiang, Jiangsu, Shandong, Hebei, Tianjin and Beijing to communicate with Qiantang, Long, Huai, Huang, Sea five major water systems, a total of 1794 km (Figure 1).