Mingjiang River in China
Mingjiang River- Long ago, this river would cause flooding that would destroy people's homes
Fish Levee: This point was created to split the river water into two paths or channels.
<div>Outer River: This path or channel is wide, but shallow. It carries a lot of water only when snow melting increases the amount of water in the river.</div>
Inner River: This path or channel carries water all year long, to allow boats to travel up-river. In drier months, it carries almost all the water of the main river.
<div>Anlan or Couple's Bridge is a bridge for people (pedestrians) that crosses both the Inner and Outer Rivers.</div>
Baopingkou or Bottle-Neck Channel: Li Bing, who designed this project in 256BC, had a channel cut through the mountains to drain flood water into a drier area where in would not destroy homes. He heated up the rock and then used cold water to crack the rock.
Feishayan &quot;dam&quot;: This is an under-water wall. When there is too much water in the Inner River, this wall pushes the extra water into the Bottle Mouth and sand and extra stone into the Outer River.
The Chinese were the first to control flooding and re-use the flood water for irrigation in this way. There is no damn and it has lasted for over 2,000 years.
This image was created by By X ziomal X (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0-2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Water was pushed into irrigation ditches from the Bottle Neck.

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