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Who was the water conservancy expert in the Tang Dynasty?

Meng Jian (? -823), minister of the Tang Dynasty, grandson of a famous doctor in the Tang Dynasty, and a famous water conservancy expert. Born in Liang County, Ruzhou, and later in Wuzhong, she was called a beauty by Wuzhong people (Letter to Ancestors).

Meng Jian has been very clever since he was a child. Around the seventh year of Zhenyuan (79 1), he was admitted to the Jinshi examination, and then took the erudite macro-character examination (initiated by Emperor Xuanzong of Tang Dynasty, with erudite macro-characters as the first priority, and graduates with higher status), and was on the list. In nine years, he served as assistant to Huang Fuzheng, an observer in eastern Zhejiang. In thirteen years, he joined the DPRK with Huangfuzheng, and served as the Foreign Minister of Cangbu (in charge of the national military reserve, cashier's tax collection, and grain storage granary). In 21 years, he was transferred to the official department as the foreign minister (in charge of examination and performance appraisal, presiding over the examination). In the second year of Yuanhe (807), he moved the secretary to be a doctor (country name, from Wupin). For four years, I paid tribute to the doctor and Zhiyi (the box in which the imperial court received books from subjects). Because of disagreement with the emperor, he was sent to Changzhou as a secretariat.

During the Tang Dynasty, the Yangtze River started from Zhenjiang, which was wide and deep, with heavy wind and waves, and the risk of grain transportation was so great that most grain transportation ships crossed the river from the South Canal via Runzhou (now Zhenjiang) to Liuwei on the other side and entered the North Canal. However, due to the high terrain above Niu Ben, the traffic is extremely inconvenient in case of low water and traffic jam.

After taking office, Meng Jian learned about this situation and made a field trip. At the same time, he learned that because there is no big river leading to the river in the northwest of Wujin, and the terrain is high, irrigation is difficult, crops are not guaranteed, and farmers are miserable. In the eighth year of Yuanhe (8 13), Meng Jian recruited15,000 migrant workers in and around Changzhou County, dredging the ancient river from the bank of the Yangtze River near Hezhuang (now Menghecheng) in the north to the middle section of Wanyuan Bridge near Niu Ben in the south. During the project, Meng Jian personally went to the riverbank to supervise. The river is 4 1 mile long. From then on, the river rolled directly to Nanzhu and merged into the Grand Canal. This river has irrigated more than 4000 hectares of land, increased crop yield and ensured farmers' food and clothing. At the same time, grain ships can also enter the river through this, sail westward along Jiajiang, the inner side of Yangzhong Dashazhou, cross the river near Runzhou and enter the North Canal, thus diverting water transportation. Later generations named this newly opened river "Meng He" to commemorate the achievements of Meng Jian, which has been used for thousands of years. Meng Jian was awarded a dress by the Spring Ceremony because of his outstanding achievements, and was transferred back to the central office (responsible for supervising officials and reporting directly to the emperor). 1September, 1999, visited Zhedong Observer (military and political chief). /kloc-transferred back to the central government in August/February as assistant minister of immigration. In April of the first year of Changqing (82 1), the volume was transferred to the secretariat of Zhou Mu. In the second year of the Republic of China, it was restored to Changzhou Secretariat. Into the prince's guest, Sidong capital. He died this year1February.