Please introduce Dujiangyan

Dujiangyan is a famous ancient water conservancy project located on the Minjiang River in the west of the Chengdu Plain in Sichuan Province, west of today's Dujiangyan City. It is located where the Minjiang River flows from the mountains into the Chengdu Plain. Before the construction of Dujiangyan, the Minjiang River often flooded and caused disasters. In 256 BC, Li Bing, the governor of Shu County in the State of Qin, and his son learned from the experience of their predecessors in water control and led the local people to build water conservancy projects. After the completion of Dujiangyan, the Chengdu Plain was fertile and wild and became the "Land of Abundance". This project is still playing a role today and is called a "living water conservancy museum".

The Dujiangyan Irrigation Project consists of three main components: Yuzui, Feishayan and Baopingkou. Yuzui is a water diversion dam built in the center of the Minjiang River. It looks like a big fish lying in the river. It divides the Minjiang River into an inner river and an outer river. The inner river is used for irrigation, and the outer river is used for flood drainage. Feishayan is a spillway built in the middle section of the water diversion dam. During floods, it not only discharges floodwater, but also uses the vortex effect of the water flowing over Feishayan into the outer river, effectively reducing the sedimentation of sediment before and after Baopingkou. Baopingkou is the water inlet of Neijiang River and looks like a bottleneck. In addition to water diversion, it also has the function of controlling the incoming water flow.

In addition, there are places of interest such as Erwang Temple, Fulong Temple, and Anlan Cable Bridge in the Dujiangyan area.

The Erwang Temple is located on the hillside on the right bank of the Minjiang River, in front of Dujiangyan. It was originally a temple to commemorate the King of Shu. During the Jianwu period of Qi Dynasty (494-498 AD), it was renamed "Chongde Temple" to commemorate Li Bing and his son. temple". After the Song Dynasty (AD 960-1279), Li Bing and his son were successively named kings by the emperor, so later generations called it the "Two Kings Temple". The main hall of the temple houses statues of Li Bing and his son respectively, as well as collections of famous quotes on water control, poet inscriptions, etc.

Fulong Temple is located in Lidui Park. Legend has it that Li Bing subdued the evil dragon here when he was controlling floods. There are now three levels of the temple. In the center of the front hall is a stone statue of Li Bing carved during the Eastern Han Dynasty (25-220 AD). There are also stone statues of weir workers in the Eastern Han Dynasty and the Flying Dragon Cauldron, a relic of Jinxian and Princess Yuzhen from the Tang Dynasty when they practiced Taoism in Qingcheng Mountain.

Anlan Cable Bridge is also known as "Anlan Bridge" and "Husband and Wife Bridge". It was built before the Song Dynasty. Located above the fish mouth of Dujiangyan, it is known as the "Five Great Bridges in Ancient China" and is the most distinctive landscape of Dujiangyan. The cable bridge is supported by wooden rows of stone piers, and thick bamboo cables are used to hang across the river. Wooden boards are laid on top as the bridge deck, and bamboo ropes are used as railings on both sides. The total length is about 500 meters. It was destroyed by war in the late Ming Dynasty (17th century AD). The current bridge is made of steel cable concrete piles.

Dujiangyan Water Conservancy Project uses unique water conservancy architectural art to create a water conservancy form that exists in harmony with nature. It created the water environment of the Chengdu Plain, thus nurturing fertile soil for the prosperity and development of Shu culture. Dujiangyan is not only the only ancient water conservancy project in the world with a history of more than 2,000 years, but also plays an important role today. At the same time, it is also a precious cultural heritage integrating the essence of politics, religion and architecture.

◎Cultural Heritage

1. Significance:

Dujiangyan is the oldest and only remaining grand water conservancy project in the world characterized by its dam-less water diversion. It is not only a great miracle of China's water conservancy engineering technology, but also a shining pearl of the world's water conservancy projects. It makes full use of the local geographical conditions of high in the northwest and low in the southeast. According to the special terrain, water veins, and water potential at the mouth of the river, it takes advantage of the situation to divert water without dams and implement gravity irrigation to achieve embankment, water diversion, flood discharge, sand discharge, and flow control. They are interdependent and form a system, ensuring that the comprehensive benefits of flood control, irrigation, water transportation and social water use can be fully exerted. The greatest thing about it is that it has endured for more than 2,250 years and is playing an increasingly important role. The establishment of Dujiangyan was based on the premise of not destroying natural resources and making full use of natural resources to serve mankind. It turned harm into benefit and made people, land and water highly synergistic and unified. It is the only great project left in the world so far? "Ecological Engineering". It created a new era in the history of ancient Chinese water conservancy, marked a new stage in the history of Chinese water conservancy, and wrote a glorious chapter in the history of world water conservancy. The Dujiangyan Water Conservancy Project is the crystallization of the wisdom of the ancient Chinese people. It is an epoch-making masterpiece of Chinese culture.

Qingcheng Mountain is located on the south side of the Dujiangyan Canal Head Project. It rises rapidly from the shore. Its main peak is 2,434 meters above sea level. It is a famous historical mountain and a national key scenic spot in China.

At the foot of Shandong lies the Mangcheng ruins of the late Neolithic Age, about 4,500 years ago, which is rare among ancient city sites of the same period in China. The large number of cultural relics unearthed here are of great significance to revealing the ancient Shu civilization. As early as the second century BC, the Qin Dynasty listed Qingcheng Mountain as one of the eighteen mountain and river sacred sites for national sacrifice. Qingcheng Mountain is the birthplace of Taoism in China. The geology and landform of Qingcheng Mountain is characterized by "danyan valleys and red cliffs". It has dense vegetation, suitable climate, lush trees, and interesting ancient sights. Longxi Nature Reserve is located on the north side of the Dujiangyan Canal Head Project, and its terrain gradually rises from 726 meters to 726 meters. The highest peak, Guangguang Mountain, is 4,582 meters above sea level, forming a distinctive plant spectrum. It has rich and unique biodiversity and is one of the important distribution areas of the national treasure giant panda.

2. Comparative analysis of the world's oldest and most famous water conservancy projects. Among the projects, the Nar-Hammurabi Canal built on the Euphrates River by the ancient Babylonian Kingdom and the artificial channels of ancient Rome have long been abandoned. Only Dujiangyan has been unique and has been continuously used and prospered through the ages.

Qingcheng Mountain-Dujiangyan is located on the western edge of the Chengdu Plain in Sichuan. It is the junction of the Sichuan Basin and the Qinghai-Tibet Plateau. It is also the turning point of the two major terrain ladders in western China. It is the intersection area of ??the two major flora. The terrain in the reserve is complex and the climate is complex. It is diverse and provides a good ecological environment for the formation and reproduction of organisms. Qingcheng Mountain is the front mountain belt of the Denglai Mountains and the southwest extension of the Longmen Mountains. The Guangguang Mountain is 4582 meters above sea level, and the Baopingkou of Dujiangyan is 726 meters above sea level. The relative height difference is very different, with great ups and downs. , forming a series of fractured and folded peaks, with various shapes and unpredictable depths. Qingcheng Mountain combines Taoist culture, ancient architectural culture, Qingcheng martial arts, Qingcheng Yixue, and Qingcheng Danfa into one mountain. Qingcheng Mountain is a famous Taoist mountain in China. The birthplace of Taoism, in 143 AD, the founder of Taoism, Zhang Ling, founded the religion in Qingcheng Mountain. The following year, he settled in Tianshi Cave and established 24 jurisdictions (dioceses). After the descendants of Zhang Sheng, the fourth descendant of Zhang Ling, built the Tianshi Mansion in Longhu Mountain, The heavenly masters of all dynasties have come to Qingcheng Mountain to pay homage to their ancestors.