Tanghe, a tributary of Oujiang River

The creek is the largest tributary of the Oujiang River. It joins the main stream of the Oujiang River in Shixi Village, Qingtian County. The main stream of the stream is called Nanyang Creek, which originates from the foothills of Da Maofeng Mountain in Qingyuan County. After converging with Zuo Creek from the right bank at Fengtan Long, it flows north into Jingning and is called Mao Long Creek; after Naxi Creek, it continues to flow north, and Ying The source of the river flows in from the left bank, and turns to flow southeast. Biaoxi River flows in from the right bank, and then turns north to flow to Wutong. Wutongkeng pours in from the left bank, and is first called a creek. It turns north to receive water from the north pit, and turns to the southeast to receive water from Jitou. The water from Yeyuan turns north, and Hexi River flows in from the right bank. After Nahe River, it turns northeast and flows. Along the way, Namei River and Dashanyuan water turn eastward. Luxikeng pours in from the right bank, turning north. The Da and Xiaoshun Streams flow in from the left bank, then turn from the east to the south to meet Xiaowu Keng, then turn to the northwest. Fukou flows from the right bank, turn to the north, flow from Zhangkoukeng on the left bank, and turn to the source of Naren Village and Dayikeng in the east. It turns northeast and flows to Hubian Village where it joins the Daxi River. The main stream of the creek has a total length of 215.9 kilometers, a drainage area of ??3,405 square kilometers, a river width of 150 to 190 meters, a natural drop of 1,282 meters in the river, an average slope drop of 5.9‰, and an average annual runoff of 3.98 billion cubic meters, with large inter-annual fluctuations in abundance and dryness. , has the characteristics of a mountain stream.

Songyin Creek was called Songchuan in ancient times, and was also known as Songxi, Songyang Creek and Songyang Port. It originates from the foothills of Huangfeng Cave in Guiyi Mountains, Suichang County, and merges into Longquan Creek at Dagangtou, Lishui City. The main stream of the source of Songyin River is Shishiduyuan, also known as Chengpingyuan and Shangtongyuan. It flows north from the source, Najin'ao River, Ankeng, and passes through Pingyuankou to Miaigao Town, Suichang County. The section of the river is called Nanxi; it flows through Yetan Bridge. After Beixi flows in from the left bank, it is called Jinxi and continues to flow north. Arrive at the ferry head, turn southeast to Zhuangshan, and Lian River merges into it from the left bank; after Jinxi River meets Lian River, it passes through Zikou and enters Songyang, where it was first called Songyin River. The river flows straight to the southeast, and the Twelve Capitals originate from the right bank and merge into it. The Wutong River flows eastward from the left bank and flows in, then flows southeastward to the ancient city. The Thirteen Capitals flows from the right bank. It continues to flow southeastward to accept Dongguanyuan, Zhuangmenyuan, Liuduyuan and Dongwuyuan, and then flows eastward through Siling. At the bottom, Zhuyuan River flows in from the right bank, Sidu River flows in from the left bank, turns to the southeast, and along the way receives water from Huangkengyuan, Guanxi, and Huangyuan to the port. Xiaogang flows in from the right bank, and then turns from the southeast to the east, meandering through In the low mountain and hilly area, to Yakou, after Yaxi River pours in from the left bank, it flows eastward after Namkengyuan, Shimayuan and Jingjuyuan, then turns southeast and flows after Namdaikeng, Yuxi and Fengnongyuan. Enter Lishui City, pass through Tongjiyan Dam, and go straight to Dagangtou. The main stream of Songyin River is 109.4 kilometers long, with a basin area of ??1,995 square kilometers, a river channel width of 120 to 160 meters, a natural drop of 854 meters, an average slope drop of 7.8‰, and an average annual runoff of 2.03 billion cubic meters. Its main tributary, Xiaogang, is second only to Xiaoyuan River of Nanxi River among the secondary tributaries of Oujiang River. Its main stream is 63 kilometers long and its drainage area is 500 square kilometers.

Good Creek was called Evil Creek before the Tang Dynasty. Because there are many beaches and the water is fast, boats are often capsized, so it is called "evil". Li Bai once lamented, "I would rather go to the evil stream to find the evil stream. I would rather be afraid of the evil stream. There are seventy beaches roaring, and the water and rocks are spraying thinly." Since the Dazhong period of the Tang Dynasty, the river has been dredged and weirs built to make it profitable, so it was renamed Haoxi. Haoxi River originates from Yangcaojian of Dapan Mountain in Pan'an County. Its upper reaches are named Jiuqu River. It flows south to receive Hengkeng, Dongkeng, Kongzhaikeng and Bogongyuan water. It flows to Incheon and receives Yangkeng, Xiaoxi and Dongkeng. The water in the pit turns west and flows to Lengshui; after passing through Lengshui, it continues to flow west, passing through Longxi, Lingxi, and Yukeng, and then to Pantan and entering Jinyun County, where it was first called Haoxi; after passing through Baizhuxi, it turns south and becomes Tangxi. It flows in from the left bank, passes through the Zuoku Reservoir, turns west and south to Huzhen, receives Bailiu Creek and Huanxi, turns southwest, flows in from Zicaokeng on the right bank, and joins through Dongjindai Shixi Creek. After passing Dongfang Town, it flows straight Go to Xiandu, a famous scenic spot; after passing through Wuyun to Dongdu, Zhangxi flows in from the left bank; after Nazhangxi, it continues to flow south to Nanchangkeng, then turns from south to west to enter Liandu District, Natingkeng, From Shanshukeng to Pengtou, Fangxi flows in from the left bank, passes through Qiutang, turns to the southwest, and merges into Daxi in Gucheng Village. The mainstream river is 129 kilometers long, with a drainage area of ??1,380 square kilometers, a river width of 90 to 150 meters, an average annual runoff of 1.22 billion cubic meters, a natural drop of 847 meters, and an average slope drop of 6.4‰.

Xuanping Creek, also known as Xuanping Port, was called Jing Creek in the "Zhejiang General Chronicle" of the Republic of China. It flows through Wuyi County, Songyang, and Liandu District of Lishui City. Xuanping River originates from Dingdugang in Wuyi County, and its main stream is Dongxi. It flows south from the source, with water from Hongtan and Yunhua on the left, Songxi on the right, and then flows south to Liucheng Town. Xixi Stream merges from the right bank and is called Xuanping Stream. It continues to flow south, and Zhuke Stream merges from the right bank. It turns east and flows to the mouth of the Xikou where water comes from Zuona Monk's altar. It still turns south and flows in. Yikeng water pours in from the left bank and Wukeng water pours in from the right bank. It turns southeast and flows to Lixin Township, Liandu District. After receiving Laozhu water, it turns east. , merge into Daxi. The main stream of Xuanping River is 72.8 kilometers long, with a drainage area of ??860 square kilometers, a river width of 50 to 100 meters, a natural drop of 990 meters, an average slope drop of 13.6‰, and an average annual runoff of 820 million cubic meters. Historically, Xuanping County was once located in the Xuanping River Basin, which is the second largest She ethnic minority inhabited area in Zhejiang Province after Jingning She Autonomous County.

Xiao Anxi, also known as Taiping Port, was called Anxi in the "Zhejiang General Chronicle" of the Republic of China. It originates from Xinzhai Xuefeng Mountain in Wuyi County and flows through Wuyi County and Liandu District.

The main stream of the source of Xiao'an River is called Juxi, also known as Licun Water. It flows south to Xinzhaiwumen, where Dalei Creek pours in from the right bank. Nadalei Creek then turns east and flows to the mouth of Yanxi, where it flows from the left bank to the bottom of the stream. Jinyan Creek flows in from the right bank; after Najinyan Creek flows southeast, it enters Liandu District and is called Xiao'an Creek. It turns south and flows south. After Naxi Creek and Gedu Water, it flows south to Xiao'an Village. After Xianghou Water merges from the right bank, It continues to flow south, collecting water from Xiaoxikou, Fengkengyuan and Liancheng along the way, and then merges into Daxi via Subu. The main stream of Xiaoan River is 72 kilometers long, with a drainage area of ??575 square kilometers, a river width of 30 to 50 meters, a natural drop of 902 meters, an average slope drop of 12.5‰, and an average annual runoff of 630 million cubic meters.

Nanxi River originates from Huanglikeng where Yongjia and Xianju meet. Between the Kuocang and Yandang Mountains, it flows from north to south through the central hinterland of Yongjia and directly into the Oujiang River. It is the second largest tributary of the Oujiang River. The total length of the main stream is 140 kilometers, and the drainage area is about 2,490 square kilometers. The natural drop is 1030 meters, the average slope is 7.4‰, the average river width in the upper and middle reaches is 50 meters, the average river width in the lower reaches is 375 meters, and the average annual runoff is 2.85 billion cubic meters. The main tributaries of Nanxi River include Yantan Creek, Zhang Creek, Hesheng Creek, Xiaonan Creek, Huatan Creek, Wuchi Creek and Doumen Creek.

Xixi is a first-level tributary of the lower reaches of the Oujiang River. It originates from the northwest of Waidang Village, Xiasheng Township, Yongjia County, flows from northwest to southeast, and flows through Jingyuan, Ouqu, Liulong, Xu'ao, and Qiaoxia Wuxiang Town, enters the Oujiang River near Yangyuan Village. The source is 1041 meters above sea level, and the surface water flow is 970 meters above sea level. The main stream is 32.5 kilometers long, with an average ratio of 29.90‰ and a drainage basin of 166.05 square kilometers. The upstream source is short and the current is rapid, and the valley is deep and the beach is dangerous. The downstream section from Xi'an Village to the mouth of the river is the tidal river section, which is 5.9 kilometers long and can be reached by small steamers to Wenzhou. There are many fields and valleys along the river, and the lower reaches are alluvial plains. It is the main grain-producing area in the county. There are 5 tributaries, among which Ouqu River and Xu'ao River are the largest.

Ouqu River originates from the west side of Shimajian, Ming'ao Township, Yongjia County, runs through Ouqu Township from north to south, and enters Xixi River near Shanghu Village, Liulong Township. The source is 893.5 meters above sea level, and the surface water flow is 230 meters above sea level. The main stream is 11.7 kilometers long, with an average ratio of 57.30‰ and a drainage basin of 24.43 square kilometers. There are many terraced fields on both sides of the strait, but very few terraced fields and valleys.

Xu'ao Creek originates from Baiyantou, Kunyang Township, Yongjia County, runs through Xu'ao Township from northeast to southwest, and enters Xixi River near Dianhou Village. The source is 1027.8 meters above sea level, and the surface water flow is 920 meters above sea level. The main stream is 9.70 kilometers long, with an average ratio of 94.00‰ and a basin of 50.12 square kilometers. There is a small amount of terraced valley along both sides of the stream.

Guxi is a first-level tributary in the lower reaches of the Oujiang River. It originates from the east side of Fengshan Village in Qingtian County. It flows from northwest to southeast, passes through Wukeng Township in Qingtian County, then enters Yongjia County, and then passes through Baiyun and Qiaotou. , Zhutu 3 townships, enter the Oujiang River near Zhutu Village, Zhutu Township. The source is 930 meters above sea level, and the surface water flow is 880 meters above sea level. The main stream is 35.15 kilometers long, with an average ratio of 25.10‰ and a basin of 153.29 square kilometers (including overseas area). From Qiaotou Town to the source, the stream is relatively straight, with terraces and small gravel beaches along the coast; from Qiaotou Town to the river mouth, it is a tidal river section, 4.9 kilometers long, and can be reached by small steamer to Wenzhou. Along both sides of the stream are alluvial plains. The tributaries include Pingtoushan, Panluo, Changtian and Xiaozhoushan streams.

Wuniu River is a first-level tributary in the lower reaches of Oujiang River and is the boundary river between Yongjia and Yueqing counties. It originates from the northeast of Wuyan Village, Renxi Township, Yongjia County, flows from north to south, passes through Renxi and Wuniu Townships, and enters the Oujiang River near Wuniumadao Village. The source is 665.0 meters above sea level, and the surface water flow is 550 meters above sea level. The main stream is 21.1 kilometers long, with an average ratio of 26.16‰ and a basin of 87.63 square kilometers (including overseas area). The upstream is mountainous and hilly, with short headwaters and rapid flows, deep valleys, and many canyons and dangerous shoals; from the Baishuiji Power Station to the headwaters, the average drop rate is 97.58‰; the downstream is alluvial plains with gentle terrain. There are 14 tributaries with a total length of 46.8 kilometers. Ma'ao Creek on the west bank originates from Dazhang Mountain and flows eastward to Wuniu Creek near Hengyu Village. The main stream is 7.5 kilometers long. The east bank canal is connected to the Baixiang water network area in Yueqing County and has a great role in regulating runoff. Other first-level tributaries of the Oujiang River with a drainage area of ??more than 200 square kilometers include: Badu River, located in the west of Longquan County, has a river length of 44 kilometers, an average slope drop of 19.8‰, and a drainage area of ??396 square kilometers. , merges into Longquan River from the left bank.

Junxi, located in the south of Longquan County, has a river length of 27 kilometers, an average slope of 51.5‰, and a drainage area of ??207 square kilometers. It flows into Longquan Creek from the right bank.

Yanzhang Creek is located in the northern part of Longquan County. The river is 28 kilometers long, with an average slope drop of 26.8‰ and a drainage area of ??229 square kilometers.

Fuyun Creek, also known as Wu Creek and Yunhe Creek, is located in the middle of Yunhe County. The river is 28 kilometers long, with an average slope gradient of 39.7‰. The drainage area is 338 square kilometers. It flows into Longquan Creek from the right bank. The Misty Creek Reservoir is built on the upper reaches of the river.

Zhenbu River is located in the west of Qingtian County. The river is 35 kilometers long, with an average slope of 22.1‰ and a drainage area of ??225 square kilometers. It flows into Daxi from the right bank.

Cuanliao River is located in the north of Qingtian County. The river is 41 kilometers long, with an average slope of 19.5‰. The drainage area is 358 square kilometers. It flows into Daxi from the left bank.

Sidu Port is located in the southeast of Qingtian County. The river is 45 kilometers long, with an average gradient of 18.3‰. The drainage area is 301 square kilometers and flows into the Oujiang River from the right bank.

Shupu River, also known as Shupu River and Tengqiao River, is located in the west of Ouhai County. The river is 44 kilometers long, with an average slope of 22.8‰ and a drainage area of ??247 square kilometers. It flows into the Oujiang River from the right bank. Wenruitang River starts from Wenzhou in the north and reaches Ruian City in the south. It is the main inland river connecting the two major water systems of Oujiang River and Feiyun River. Wenzhou City and Ouhai County are formed by Quxi, Xiongxi and other rivers, and are classified as Ou The river basin part is 353 square kilometers.

Yongqiangtang River is formed by the collection of Zheng'ao, Baishui, Shuang'ao, Yaoxi, Huang'ao and other streams and rivers. The total length of the river is 238 kilometers and the drainage area is 146 square kilometers.

Liushitang River, also known as Baishi River System, mainly includes Liushi River and Baixiang River. The main source of the two rivers is Baishi River, which originates from Huangtan Cave in Guogong Mountain, flows through Baishui River in Zhongyandang Mountain, and flows into the two reservoirs of Zhongqian and Baishi. River and Baixiang River enter the plain river network, with a drainage area of ??245 square kilometers.