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Archeological find
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The flood and irrigation system built more than 5,000 years ago in Liangzhu area in the city’s Yuhang District is rated one of the top 10 archeological finds made in China in 2015.
The water system consisted of 11 dikes around the site of Neolithic ruins in Liangzhu and existed for 4,500 to 5,300 years. It is the oldest flood system ever found in China.
The dikes were built with a mixture of straw, bamboo and mud. Carbon-14 dating put their construction period between 4,700 years and 5,100 years ago. They formed three reservoirs in valleys with the biggest one about 9.4 square kilometers, four times the size of the West Lake.
The water system occurred about 3,000 years before Yu the Great, the legendary ruler of the Xia Dynasty (c.21st century-16th century BC), built dikes and dams to control floods.
Many jade artifacts were unearthed in Liangzhu ruins. Archaeologists are calling for better protection of the site.
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