Dujiangyan [1] is located on the Minjiang River in the west of Chengdu Plain, west of Dujiangyan City, Sichuan Province [2]. Dujiangyan is not only a world-famous ancient water conservancy project in China, but also a famous scenic spot. Dujiangyan has beautiful scenery and numerous cultural relics, including Fulongguan, Erwang Temple, Anlan Suoqiao, Yuleiguan, Lidui Park, Yulei Mountain Park, Yunv Mountain, Lingyan Temple, Zhao Pu Temple, Cuiyuehu Lake and Dujiangyan Water Conservancy Project.
1982, Dujiangyan, as an important part of Qingchengshan-Dujiangyan scenic spot in Sichuan, was approved by the State Council to be included in the first batch of national scenic spots. At the 24th session of the United Nations World Heritage Committee in 2000, according to the definition of cultural heritage in Article 2 of the United Nations Convention for the Protection of World Cultural and Natural Heritage, Dujiangyan Water Conservancy Project was identified as a world cultural heritage because of its long history, large scale, reasonable layout, scientific operation, harmonious combination with the environment and outstanding universal value in history and science. On May 8, 2007, Chengdu Qingchengshan-Dujiangyan Scenic Spot was officially approved by the National Tourism Administration as a national 5A-level scenic spot.
Dujiangyan City belongs to the humid climate zone in the middle subtropical zone, with an annual average temperature of 15.2℃, an annual average precipitation of nearly 1200mm and an annual average frost-free period of 280 days. There are four distinct seasons here, and there is no heat in summer. In the hottest July and August, the average temperature is around 24℃, and the average maximum temperature is only 28℃. There is no cold in winter. The average temperature in the coldest month of 65438+ 10 is 4.6℃, and the average minimum temperature is about 2℃.
Li Bing, the prefect of Qin and Shu counties, built weirs in the early days. The name of Dujiangyan is "Kuigui", which is because of the Leiyushan, Qin and Han Dynasties next to Dujiangyan.
It used to be called "Lushan Mountain", but at that time, the main ethnic groups around Dujiangyan lived in the Shu-Han period, when the frontier strongmen were in the Three Kingdoms period. Du 'an County is located in Dujiangyan, which is called "Du 'an Weir" because of its name. At the same time, it is also called "golden dike", which highlights the water diversion function of fish mouth and uses dike instead of weir as its name. They call this weir "Gui", so Dujiangyan is called "Gui".
In the Tang Dynasty, Dujiangyan was renamed "Jueweiyan". Because the materials and methods of embankment construction at that time were mainly "broken bamboo as a cage, with a diameter of three feet, filled with solid stone, which was called" tail ". It was not until the Song Dynasty that Dujiangyan was mentioned for the first time in the history of the Song Dynasty: "Yongkang army ruled Dujiangyan at the age of 20, and the cage stone snake broke the river and stopped water to irrigate several counties." Regarding the origin of the name Du Jiang, Shu Shui Kao said: "Fu River, a Chengdu River, has two sources, namely Lijiang River and Liujiang River." Liu Jiang is another name for Jian Jiang. On the Chengdu Plain, the Fuhe River is Yongjiang River and the Nanhe River is Jianjiang River. Their upper reaches are Baitiao River and Zouma River, which are divided into Dujiangyan and Neijiang. "National Records" said: "Du Jiang is the river of Chengdu". Since the Song Dynasty, the whole Dujiangyan water conservancy project has been generally called Dujiangyan, which accurately represents the whole water conservancy project system and has been used ever since. Jinsha