The main tributary of Jiaojiang River

Shifengxi, a tributary of Lingjiang River, also known as Daxi, originated in Pan Da, Pan 'an County, and is the largest river in Tiantai County. It is the mother river of Tiantai, flowing through Longxi, Jiejie, Xinzhong, Pingqiao, He Shan, Lize, Chengguan and Tantou, leaving the country in Tanlingwan Village and entering Linhai City. Sanjiang Village is called Lingjiang after meeting Yong 'an Creek. Total drainage area 16 10 km2, rooftop area11.54 km2. The river drop is 686 meters, and the average flow for many years is 20.53 cubic meters per second. Total length132.70km. Shifengxi is a mountain stream with steep slope, rapid water flow, short flood peak duration and rapid water level rise and fall. Before the founding of New China, after a rainstorm, fertile land was flooded and houses were destroyed. Since the founding of New China, more than 60 large and small reservoirs such as Lishimen Reservoir, Tongbai Reservoir and Longxi Reservoir have been built in Shifengxi.

Yongning River, originating from the tip of the Great Temple in the west of Huangyan City, runs through the west of Huangyan City from west to east, and joins Lingjiang River at Sanjiangkou to form Jiaojiang River, with a total length of 80 kilometers. In the upper reaches of Dahengxi, the intersection of Tang Sheng and Huangxi is called Huangyanxi, and the intersection of Ningxi and Banlingxi is called Yongning River, which enters Changtan Reservoir, about 34 kilometers long. Below the reservoir, from Chaoji to Sanjiangkou is called Yongning River, which is 43 kilometers long. There are Xiaokenggang, Rouji River, Yang 'ao River, Jiuxi River, Yuandong River, Yugongpu River and Xijiang River flowing into the reservoir, with a drainage area of 889.80 square kilometers and a drop of 899 meters, with an average gradient of 10.8‰.

Datian Port, a tributary of Lingjiang River, originated in the northeast foot of Zhu Jin, near the sea. Its upstream is called Xiao Zhi River, and its northwest flows to Xiajiang River. After entering Kanggu River, it is called inverse river, and then it enters Niutoushan Reservoir. Then it flows to Aurora village in the northwest, called Shaojiadu Port. After entering the Datian River on the right, it is called Datian Port, flows to Wukong 'ao in the southwest and flows into Lingjiang from the left bank. Datiangang River is 53 kilometers long and 30-80 meters wide, with a drainage area of 522 square kilometers and a drop of 1.59 meters, with an average gradient of 3.0‰. 1990, after the gate of Datian Port was completed, Datian Port has become an inland river.

Yicheng Port, a tributary of the right bank of Lingjiang River, originates from the Green Pagoda in Linhai City, flows through Shuangkeng in the southeast, meanders to Youxi (Garden) in the northeast, connects the water from Longmen Reservoir in Wenjiaao to the right, flows to the Brown shed port and flows into Lingjiang River. Yicheng Port River is 44 kilometers long, with a drainage area of 229 square kilometers and a drop of 849 meters, with an average gradient of 19.5‰. 1974 After the completion of Hongqi Gate, Yicheng Port became an inland river.

Zhuxi, a tributary of Yong 'anxi, originated in Xiakeng, Xianju County, Kuocangshan Mountain, flowed through Zhuxi Town in the northeast, and merged into Yong 'anxi from the right bank near Hutan under the war. Zhuxi is 49 kilometers long, with a drainage area of 379 square kilometers, a drop of 787 meters and an average slope of 16.0‰.

Shisandukeng, a tributary on the right bank of Yong 'anxi, originates from Shibaling, Leigonggang, Xianju County, flows northeast to Zhenkou, leaves the valley and enters Tuoxi Basin, and flows north to Tuoxi Dachang to join Yong 'anxi. Shisandukeng River is 4 1km long, with a drainage area of 226km2 and a drop of 560m, with an average gradient of 13.5‰.

Longxi, which originated in Wuxin Village, Tongshan, Linhai City, flows eastward into Xikou Reservoir, flows southward through Shanmen Village after leaving the reservoir, and enters the river network of Jiaobei Plain. Because the river network is over 100 Li Long, it is called "Baili River". Its runoff mainly flows into Jiaojiang River through Huajingmen and Huipumen, and the rest flows into Taizhou Bay through Songpumen and Duxiapumen. Longxi River is 23km long (from Wuxin Village to the lower reaches of Huajingmen in Jiaojiang River), with a gradient of 24.6‰ and a drainage area of 30 1 km2.