In the Dujiangyan Scenic Area, cross the bridge on the west side of the Dui Park and cross the Neijiang River to the right is Feisha Temple. This is also one of the three major water conservancy projects in Dujiangyan. Looking east at Feisha Temple, the opposite bank of the Neijiang River is Baopingkou and Lidui. Feisha Temple is also known as "flood discharge road" and "water reduction river". This slightly tilted dike is repaired on the side of the off-duile and at the end of the King Kong dike, and a 200-meter-wide mouth is opened from south to north according to a certain height (the river bed to the river surface 2.15 meters high), which has remarkable functions of flood discharge, sand discharge and water adjustment. As one of the three major pieces of Dujiangyan, the ancient temporary project was made of bamboo cages and pebbles, and even now it has been converted to a once-for-all concrete casting form, its appearance still looks very ordinary. In fact, this flying sand squall is very powerful, can be said to ensure that the Chengdu Plain is not flooded the key. When the water volume of the inner river is small, it stops water into the inner river irrigation area; when the water volume of the inner river exceeds the upper limit of the flow rate of the bottle, the excess water will overflow from the flying sand squall and discharge to the outer river; In the event of extraordinary floods, it will also break the embankment by itself, so that a large number of rivers will return to the current of the Lijiang River. The Lijiang River has sped from the mountains, carrying a large amount of sand and stones. If they are allowed to go down the inner river, they will silt the bottle mouth and irrigation area. Because the location design is very clever, the sand has a strong sand discharge ability, can enter the Neijiang sand and then exclude, so called the sand.
More
In the Dujiangyan Scenic Area, cross the bridge on the west side of the Dui Park and cross the Neijiang River to the right is Feisha Temple. This is also one of the three major water conservancy projects in Dujiangyan. Looking east at Feisha Temple, the opposite bank of the Neijiang River is Baopingkou and Lidui. Feisha Temple is also known as "flood discharge road" and "water reduction river". This slightly tilted dike is repaired on the side of the off-duile and at the end of the King Kong dike, and a 200-meter-wide mouth is opened from south to north according to a certain height (the river bed to the river surface 2.15 meters high), which has remarkable functions of flood discharge, sand discharge and water adjustment. As one of the three major pieces of Dujiangyan, the ancient temporary project was made of bamboo cages and pebbles, and even now it has been converted to a once-for-all concrete casting form, its appearance still looks very ordinary. In fact, this flying sand squall is very powerful, can be said to ensure that the Chengdu Plain is not flooded the key. When the water volume of the inner river is small, it stops water into the inner river irrigation area; when the water volume of the inner river exceeds the upper limit of the flow rate of the bottle, the excess water will overflow from the flying sand squall and discharge to the outer river; In the event of extraordinary floods, it will also break the embankment by itself, so that a large number of rivers will return to the current of the Lijiang River. The Lijiang River has sped from the mountains, carrying a large amount of sand and stones. If they are allowed to go down the inner river, they will silt the bottle mouth and irrigation area. Because the location design is very clever, the sand has a strong sand discharge ability, can enter the Neijiang sand and then exclude, so called the sand.
Before 2000, it was a bit level to be able to divert sand with the principle of physics! It is indeed a genius, it is worthy of being the talent that the Qin King fancy, admires, and does have a level.
Flying sand is located in the lateral overflow at the end of the fish mouth water dike, anciently called "waiting the Lang", because of the good sand discharge effect. Flying sand is used to discharge the flood discharge of the Neijiang dike, which ensures the need for water in Chengdu Plain and can discharge most of the sand and stone entering the Neijiang River.
飞沙堰是都江堰三大水利工程之一,它的作用是排泄功能,岷江水到离堆后形成旋涡,将水底的泥沙卷起回流,从飞沙堰随水漂出进入外江。这就可以使进入内江的泥沙及过量的水及时排出,以保证内江灌区及成都市区的安全,保证宝瓶口不管岷江来水有多大都只进固定的流量,都江堰有2278年的历史,你看,我们的古人多么的智慧!伟大的都江堰,伟大的李冰父子!
飞沙堰是都江堰水利工程的三大组成部分之一,飞沙堰巧妙的利用了水流的离心作用,使堤堰拥有了自行清理泥沙的能力,在众多水利工程中显得独特而神奇。当内江流量超过每秒1000立方米时,飞沙堰分流比超过40%以上,分沙比可达75%左右。洪水越大,飞沙堰的分流比越高,排沙效果越显著。经飞沙堰排沙后,进入宝瓶口的推移质仅占岷江总量的8%左右。也就是说,飞沙堰能处理河水中百分之九十左右的泥沙,古人的智慧实在是太令人惊叹了!