What's the name of the biggest river in Tai 'an? And introduction.

Wenhe sunset Dawenhe, called Wenshui in ancient times. Dawen River is the only tributary of the Yellow River in Shandong and the largest river in Tai 'an.

Dawen River originates from the northern foot of Gu Xuan, and is known as the head of the seventy-two Yimeng River. The upper reaches of Dawen River are called Mouwen River, and it flows through Xintai and Laiwu to Nachai River in Dawenkou, Tai 'an, which is called Dawen River. From east to west, it flows through Laiwu, Xintai, Taishan, Daiyue, Feicheng, Ningyang, Wenshang, Dongping and other counties and cities, and then flows into the Yellow River through Dongping Lake, with a total length of 208 kilometers and a drainage area of 8,536 square kilometers. From Dawenkou in Daiyue District to Daicunba in Dongping County is the middle reaches, and below Daicunba is the downstream, which is now the Daqing River (in another article).

The middle reaches of Dawen River, with a length of 12km, enter from the south of Zhucheng Village, Jieshan Township, Dongping County, and flow through Guo Zhuang in Dongyang, Guo Zhuang in Xiyang, Houkoukou, Qiankoukou, Qicun and Liusuo to Daicunba, which is the reach under Dongping's jurisdiction. Dawen River is a seasonal river, and its discharge varies greatly. The flood control discharge is 7,000 cubic meters per second, the average annual runoff is 65.438+88.3 million cubic meters, and the sediment concentration is 0.53-3.654.38+0.2 kg per cubic meter.

Dawenhe, the basin and its name have been changed many times in history. During the Northern Wei Dynasty, Wenshui was a tributary of water saving. After entering Dongping territory, it enters Jishui through the southwest of Yancheng, the west of Xiang Tao (the dam site of modern village), the south of Wuyan (now Wuyan village), and the southwest to the north through Shouzhangcheng (now Huozhuang) and Anmin Pavilion (Xiao 'anshan). During the Northern Song Dynasty, Jishui (North Qinghe) to the north of Liangshanpo (Ancient Onoze) merged with Wenshui, also known as Daqinghe, and Wenshui became a tributary of Daqinghe. After Song Xianping, the Yellow River burst many times. The second Wenhe River in the south of Dongping City is silted up, circling the east of Dongping City and going north from the downstream of Qigou; Meet at Majiakou around the south of the city, all of which flow to Qinghemen and enter the Daqing River. In the 9th year of Yongle in Ming Dynasty (A.D. 14 1 1), Huitong River was reopened and built in the north of Ningyang. City dam to contain it? The flow of; Daicun Dam was built in the south of Kanhekou to curb the road to the sea. In the fifth year of Xianfeng in Qing Dynasty (A.D. 1855), Wenhe River became the last tributary of the lower reaches of the Yellow River after the Yellow River seized the river and entered the sea. Wen entered the Yellow Mouth and moved north to Yushan. After the establishment of People's Republic of China (PRC), Dawenhe entered the county from the east of Yancheng. 1958 After the completion of Dongping Lake Reservoir, Wenshui will introduce Daqing River into Dongping Lake and enter the Yellow River through Chenshankou Lake Gate.

From Yancheng to Daicunba, trees along the river are shaded and aquatic plants flourish. River sand is a rich resource in this area, and there are many battlefields along the river. Taking river sand is an important project for people to increase their income through diversification.

The Dawen River flows fast, and there are many dangerous workers in Zuowan. 1884 (the tenth year of Guangxu), six groins (pick-ups) were built in Gangcheng and Liang Shi, most of which were lime soil and a few were dry masonry. Before the founding of the People's Republic of China, there were six revetment projects and groins 10 in the whole river. After the establishment of People's Republic of China (PRC), groins and triangular dams such as Yanglanjiao (No.2 Dam of Jin Ming New Village), Zhangcheng and Liujiasuo were reinforced at 1950, and dangerous workers such as Liang Shi and Sang 'ankou were protected by riprap. 195 1 year-old repaired and reinforced 25 dangerous houses. 1952, Ningyang, Feicheng and Dongping counties carried out a major renovation of dangerous works. Seven groins were built, 1 seat was rebuilt, and five groins were renovated and reinforced, with 746m masonry revetment, 38m riprap revetment, 745m masonry protection foundation and 43m riprap protection foundation. Since then, it has been renovated, rebuilt and expanded year by year. As of 1985, the revetment and beach protection on both banks have been completed, with a length of 27.7 kilometers. There are 35 groins and 6 triangular dams, including 2 lime-soil dams and 4 masonry dams.

With the development of coastal economy, especially the coal mines and paper mills along the way, the Dawen River has been polluted to some extent, which has also affected the life and health of coastal residents.