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Chapter 282 Regret

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    ?

    Just when Chu Lihua thought that she had already walked around Dujiangyan, she suddenly came to an open and flat place. It seemed to be a tall sluice in the distance, right?

    Chu Lihua dragged Wang Ting, who was still a little weak-legged, to follow, and only after listening did she realize that this was the gate of the Dujiangyan Water Conservancy Project.

    ——"The general principle of the Dujiangyan Project is simply to "build dams to divert water, build canals to divert water". Divide the Minjiang River into two streams, and one of the streams will be introduced into the Chengdu Plain.  The main project of Dujiangyan includes Yuzui dike, Feishayan spillway and Baopingkou water inlet.

    The first is to build the Baopingkou water diversion project, which divides the water flow of the Minjiang River into two channels, so that the water of the Minjiang River flows to the Chengdu Plain in the east, and at the same time reduces the flow of the river water in the west, so that the river water in the west will no longer flood.  Drought, irrigate the good fields there.

    Although Baopingkou has played the role of diversion and irrigation, due to the high terrain in the east of the river, it is difficult for the river water to flow into Baopingkou.  As a result, the water diversion weir "Yuzui" was built in the Minjiang River, forcing a large amount of river water to flow into Baopingkou.

    Yuzui divides the river into two parts: the west side is called the Outer River, which flows down the Minjiang River; the east side is called the Neijiang River, which flows into Baopingkou.  Because the inner river is narrow and deep, and the outer river is wide and shallow, the water level is low in the dry season, and 60% of the river water flows into the inner river with a low riverbed, which ensures the production and domestic water in the Chengdu Plain; and when the flood comes, because the water level is higher,  As a result, most of the river water is drained from the wider outer river. This design of automatically distributing water from the inner and outer rivers is the so-called "four to six diversions".

    In order to further control the amount of water flowing into Baopingkou, play the role of flood diversion and disaster reduction, and prevent the water volume in the irrigation area from fluctuating from large to small, and cannot be kept stable, Li Bing is at the tail of the Yuzui water diversion embankment, leaning against Baopingkou.  In some places, flat water tanks for flood diversion and "Feishayan" spillway were built to ensure that the inner river was free from disasters. There was a bend in front of the spillway, and the river water formed a circulation.  River, so that the Neijiang and Baopingkou waterways will not be silted up.  "

    Just after the tour guide finished explaining here, Chu Lihua was completely shocked by such great wisdom.

    She directly dragged Wang Ting to the side of the large sluice to watch carefully.

    Chu Lihua really didn't know what language to use to describe that magnificent scene.

    There is really nothing wrong with saying that there is nothing wrong with the book when it is used.  Even if you can use beautiful language to describe all kinds of small hypocrisy and small emotions, in the face of such a magnificent and magnificent scene that has been left over for more than two thousand years.  Historical monuments are still not fully described.

    After the two walked around the tall and magnificent sluice carefully, the tour guide and the group of people you were following before turning back had long since disappeared, but there were still people who walked straight ahead, and the two of them boldly  To keep up, this time is basically a place with a lot of people walking, and it must be a scenic spot.  Otherwise, even if it is lost, most people will lose it together, and it can be found again.

    After not going around much, the two followed people to a place that seemed to be a viewing attic, or what?  Because there is no tour guide, I don't know the name.

    Anyway, after going up layer by layer, standing next to the handrail next to the antique attic fence and looking down and into the distance, you can have a panoramic view of the entire Dujiangyan Water Conservancy Project.

    There was actually a grandfather next to him, and he started to introduce it to the young man next to him——

    "Dujiangyan is a comprehensive water conservancy project for flood control, irrigation and shipping.

    Li Bing used the middle-flow method as a weir to build a ridge with stones in the Minjiang Gorge, which is called Dujiang Yuzui, also known as Fenshui Yuzui.  Yuzui is a water-dividing construction project that divides the Minjiang River into two.  The east side is called Neijiang, which is used for irrigation canals; the west side is called Waijiang, which is the main flow of Minjiang River.

    A Lidu (same pile) was built on the south bank of the Minjiang River near Guanxian City. The Lidu is a pile of stones separated after rock excavation, sandwiched between the Inner and Outer Rivers.  On the east side of Lidu is the mouth of the Neijiang River, called Baopingkou, which has the function of controlling water flow.  In summer, when the Minjiang River rises, the Yuzui of the Dujiang River is submerged, and Lidui becomes the second water diversion point.

    The Neijiang River enters the irrigation system densely distributed on the western Sichuan Plain from below Baopingkou. When it is dry, it diverts water to infiltrate, and when it rains, it fills the water gate ("Huayang Guozhi · Shuzhi"), which ensures the irrigation of about 3 million mu of fertile land and makes the Chengdu Plain  Become a land of abundance in drought and flood.  The planning, design and construction of Dujiangyan are relatively scientific and creative.  The project planning is quite perfect, and the joint use of the water diversion fish mouth and the treasure bottle mouth can distribute the flow of flood and dry water according to the needs of irrigation and flood control.

    In order to control the water flow, theMake a man of three stones at the mouth, stand in three waters, so that the water will not be exhausted, and the water will not be full ("Huayang Guozhi·Shu Zhi").  These stone figures apparently functioned as water gauges, primitive water gauges.  From the determination of the two heights of the stone figure's foot and shoulder, it can be seen that not only was there long-term water level observation at that time, but also the general law of the variation range of the Minjiang River's flood and dry water levels had been grasped.

    By observing the water level of the water inlet of the Neijiang River, the inflow flow can be grasped, and then the water level can be adjusted by the water diversion project at Yuzui and Baopingkou, so that the inflow flow of the channel can be controlled.  This shows that as early as 2300 years ago, the Chinese working people had mastered and utilized the principle of weir flow under a certain water head in the management of irrigation projects.  "

    After coming down from the viewing attic, I don’t know how the two of them got there. Then they came to the place where it is said that water will be released for tourists to simulate the flood discharge scene. Unfortunately, they came too late, and people always release water in the morning.  of.

    ——"Why? We've come here pretty quickly, I think."

    Wang Ting was speechless, but she didn't like it.

    ——"Maybe the door you enter is different. The ones coming in from this side are the ones who first set it up, watch the water release, and then go to the top to see the Erlong Temple, and then go there."

    There are always enthusiastic people next to them to explain their doubts.

    ?  ?  ?

    No way, why are there several doors, if you enter the wrong way, the order of sightseeing is wrong, it will be chaotic.  Will you miss the most worth seeing scenery?

    So why are there tour guides over there?  Didn't the tour guide also lead them there?  Could it be that the tourists gathered there, so they followed the lead and walked there?

    Let's try again tomorrow morning?  Anyway, at this time today, it is estimated that there is no time to go to Mount Qingcheng.  (Remember the site URL: www.hlnovel.com
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