Dujiangyan Fish-mouth Water-dividing Dike

Watch the water conservancy engineering park during the Warring States period and feel the wisdom and outstanding talents of ancient working people. The scenery is pleasant, the environment is quiet, it is worth seeing, Baopingkou, Yuzukou, Anlanqiao Husband and Wife Bridge, the scenic spot is very large, you can play for two days!

The combination of nature forces and the wisdom of the working people is very spectacular. It is a pity that the photos cannot be taken and it is worth a visit. Unfortunately, we rushed to a rainy day and many places did not go.

The shape is very simple, the design of mathematical physics is in place, before 2000 can have such a creation, really not simple, the ancients are really respectable, have been using 2000 is even more not simple.

In the Dujiangyan Scenic Area, take the battery car to Yuzui. From Feishayu, cross a bridge to the Dujiangyan Yuzui water separation embankment. Under the bridge is a certain height, and the road opened from south to north in Feishayu has a remarkable function of more than 200 meters wide. The battery car walked on the fish mouth water dike for about 5 minutes before coming to the fish mouth. In ancient times, the Lijiang River from the upper reaches of the mountain canyon from the Gonggangling in Songpan County was raging. The flood period was like a dislocated Mustang, and it was a serious flood when it galloped to the lower fan-shaped western Sichuan plain. Li Bing inspected the terrain when building Dujiangyan, and decided to use artificial construction of a water dike in the heart of the river. This dike is like a huge whale lying against the river, the top of the dike is conical like a large fish mouth, so it is called "fish mouth". It is head high in the heart of the Lijiang River, including Baizhangdi, Liao, King Kongdi and other a set of mutual facilities. Its main role is to divide the raging Lijiang River into two rivers inside and outside, the west is called the Waijiang River, commonly known as the "Jinma River", is the Lijiang River, mainly used for flood discharge and sand discharge; The eastern foot of the mountain is called Neijiang, which is an artificial water channel opened along the side of Yulei Mountain, mainly for irrigation. In ancient times, fish mouths were built with bamboo cages and pebbles, like the flying sand fins introduced earlier. It is the use of bamboo rich in western Sichuan into a long bamboo cage horizontal dam, filled with alluvial pebbles by the river, cage after cage, layer after layer, resulting in strong and non-water dikes. Because it is built in the Lijiang River out of the mouth of the mountain to bend circulation of the river, winter and spring river flow is small, water flow through the fish mouth on the curve detour, the mainstream directly into the inner river, the intake of the inner river is about 60%, the water intake of the outer river is about 40%; The water level rises in summer and autumn, and the water potential is no longer restricted by curves. The mainstream is directly flushed to the outer river, and the proportion of the inner and outer rivers is automatically reversed: the water intake of the inner river is about 40%, and the water intake of the outer river is about 60%. Such engineering design cleverly uses the terrain, that is, perfectly solves the needs of farmland water and people's living water during the winter and spring drying period of the Neijiang irrigation area, and solves the flood prevention problem in summer and autumn flood season once and for all. The "fish mouth" of Dujiangyan after the Wenchuan earthquake was damaged like many attractions in Sichuan, and many cracks appeared in the body. Today, the traces of repair on the "fish mouth" are still clearly visible. It is gratifying that this iconic attraction in Dujiangyan has restored its former style and is valuable.

Dujiangyan water division project, because of its shape as a fish mouth, it stands in the heart of the Lijiang River, divided the Lijiang River into two rivers inside and outside. Fish mouth uses terrain and terrain to subtly complete the task of diverting water, and plays the role of automatic adjustment of water volume under different water levels in flood and dry water seasons.

Dujiangyan is almost 2000 years of project, but still in play, fish mouth divided the Lijiang River into the outer river and the inner river, played a huge role in flood diversion and irrigation, which is quite worth seeing.