Who is the expert to tell us about Jinjiang, tongren city?

I have collected some professional materials of our school here, hoping to help you.

Data 1.

Jinjiang? It is the largest river in this area. The total basin area is 4 157 square kilometers, including 4,068 square kilometers in China and 88.7 square kilometers in Hunan. Jinjiang originated in the southwest foot of Fan Jing. The source section is called Baxi River, the section from Xiao Min to Jiangkou is called Xiaomin River, and the section from Jiangkou to Tongren is called Dajiang. After Tongren Chengguan joins Xiaojiang, the exit to Yangtou is called Jinjiang. Total length 158km, drop 1495m, and gradient of 9.5%. Annual average flow 1 12.0 m3/s, annual flow in dry season 7 1 m3/s, monthly average flow in dry season 24.6 m3/s, water level change 3 ~ 10m: theoretical hydropower reserve is 230,600 kilowatts, which can be developed/kloc-0. The basin has a total population of 522,000 people, 443,000 mu of cultivated land and a per capita water consumption of 6,770 cubic meters.

Among the tributaries of Jinjiang, 55 tributaries have a river length of more than 10 km and a drainage area of more than 20 square kilometers. The main primary tributaries are Xiaojiang River, Taiping River, Xieqiao River and Wawu River, while the larger secondary tributaries are Zhaiying River, Shaba River, Niulang River and Daliang River (Chuandong River). Xiaojiang originated in Zhaiying Township, Songtao Autonomous County at the north foot of Fan Jingdong. It flows through Ying Tao, Heping and other places and joins the great river in the west of Tongren, with a total length of 83.8 kilometers. Xieqiao River originates from Xinchang Township, tongren city, flows through Tapa Cave and Xieqiao, and joins the river at Chaoniping, with a total length of 4 1.7km, which is commonly known as Tongren maotiaohe. Wawu River originates from Meizixi, Aozhai Township, Wanshan Special Zone, and flows into Jinjiang through Wawu to Yangtou, with a total length of 50 kilometers. Like Xiaojiang, Taiping River flows through Gaodong of Songtao Autonomous County and Taiping of jiangkou county, and joins Min River in Jiangkou City, with a total length of 63.7 kilometers. See Table (1-19) for the hydrological characteristics of the main rivers in Jinjiang River Basin.

Message 2,

Jinjiang? Also known as Chenshui and Mayang River. One of the five streams in ancient Wuling. In the east of Guizhou Province and the west of Hunan Province. Originated at the southeast foot of Fan Jingdong, which is 2494 meters above sea level in Wuling Mountain area, it flows southwest to jiangkou county, turns east, passes through Jiangkou and Tongren counties, and enters Hunan at Niujiaoping in Tongren County. It flows through Mayang County in the east, and is called Chenshui after receiving loess flow in the east, and then flows into Yuanjiang River in the suburb of Chenxi County in the east. The total length of the main stream is 289 kilometers, of which the length in Guizhou Province is 144 kilometers. The basin covers an area of 7536 square kilometers. The annual average flow 180m3/s, the natural drop is 657m, and the average gradient is 2.26%. The theoretical reserve of environmental water energy in Guizhou Province is 6.5438+0.06 million kilowatts, and the possible developed installed capacity is 29,500 dry watts. A 1 hydropower station has been built, with an installed capacity of 5000 kilowatts. It is planned to build a 1 hydropower station with an installed capacity of 65438+6000 kilowatts. The valleys and hills are low, the valleys are staggered, and there are small basins along the river. Below Tongren, 8-15t motorized sailboats can be navigable seasonally, and 6-15t wooden boats can be navigable all year round. In dry season, the river is 8-20m wide and 0.6-0.8m deep. The water system is developed, and the tributaries mostly extend on the left bank of the river. The main tributaries are Xiaojiang River, Taiping River, Xieqiao River, Wawu River and Chuandong River.

Finally, there are some things to note:

1, the first data only tells the hydrological characteristics of Jinjiang from the source to leaving Guizhou, and the second data tells the hydrological characteristics of Jinjiang from the source to the whole reach of Yuanjiang. So there are some differences between these two figures.

2. These data are from the 1980s and 1990s, and some aspects (especially hydropower development) are quite different from the present ones, so we should pay attention to them.

There is no mention of protection in the above information, but I went to Jinjiang last year, so I will talk about it. Jinjiang, the source of Taiping River, and its tributaries are located in Fanjingshan Nature Reserve, with poor water quality and rich fish species. However, when the river left the reserve and came to jiangkou county and Tongren, it was affected. The greater impact is the untreated domestic sewage and hydropower development, which changes the hydrological characteristics of rivers. It not only reduces the self-purification ability of rivers, but also slows down the flow rate of water, making some fish adapt to rapids lose their habitat and cutting off the migration channels of fish in the upstream and downstream of river hydropower stations.