The 12th Canal of Zhangyin (also known as Ximen Canal) is located in the south of Ye Wei (now under the dam of Yuecheng Reservoir in Hebei). According to "Biography of Historical Comics", "Ximen Bao immediately sent people to dig 12 canals to divert water to irrigate people's fields". Zhanghe No.12 canal is a large-scale diversion irrigation canal system with Zhangshui as its water source in the early Warring States period. The irrigation area is south of Zhanghe River (now north of Anyang City, Henan Province). Up to now, Gao Xue Cun in Anyang County still retains the remains of smelting canals and sluices.
Zhangyin 12 Canal is a large-scale diversion irrigation canal system with Zhangshui as its source in the early Warring States period. It is connected with Shaopi, Zhangou, Longshou Canal, Dujiangyan, Zhengbai Canal, Lingqu, Jindi, Bianqu, Gap, Zhangzi, Hongqipi, Fushan Weir, Chishan Lake, pogangdu, Songhuaba, Lianhu, Jianhu, Ningxia Ancient Irrigation Canal, Yongji Canal and Acacia.
The first canal head is in Xiye 18, and Xiang Yan 12 has 12 low overflow weir. All weirs are equipped with water intakes and water intake gates on the upstream right bank, forming a 12 channel. The irrigated area is less than 65438+ 10,000 mu. There is a lot of sediment in the turbid water of Zhangshui, which can irrigate fertile fields and increase production, thus making the wild land rich. At the end of the Eastern Han Dynasty (AD 25-AD 220), Cao Cao took Ye as the base and renovated it according to its original appearance. Since then, the twelve weirs have been renamed as patio weirs.
Lu's "The Canal in the Spring and Autumn Music City" was created during his reign in history, about after Ximen Bao 100, criticizing Ximen Bao for not knowing how to irrigate the fields. The adoption of this statement in Han Shu Gou Lu contradicts the Historical Records. Later generations reconciled two theories, saying that Ximen Bao opened the canal first and history began to open again.
In the second year of Tianping in the Eastern Wei Dynasty (AD 535), the patio weir was converted into Tianping Canal, which became the head of a single canal, and the irrigation area was expanded, which was later called Wanjin Canal. The head of the canal is more than 40 miles north of Anyang today, on the south bank of Zhanghe River. After the Sui Dynasty (58 1~ 6 18) and the Tang Dynasty (6 18 ~ 907), irrigation areas with Zhangshui and Huanshui (now Anyang River) as their sources were formed in this area. In the Tang Dynasty, the Tian Ping Canal rebuilt its branch canal, irrigating farmland 10 million mu.
In the Qing dynasty (1644 ~1911), it was still used in the Republic of China. 1959, the state started the construction of Yuecheng Reservoir on Zhanghe River, and then the main canal of Zhang Nan was excavated in Anyang City, drawing water from the reservoir to build a large irrigation area-Zhang Nan Irrigation Area, with a designed irrigation area of 6.5438+0.2 million mu, replacing the ancient irrigation canal.