Requesting information about Yanhe, Lianyungang City

Salt River is an artificial river connecting Huaiyin City and Lianyungang City, and is the Huaibei Yannan Channel. Located in the northeast of Jiangsu Province. In ancient times, it was called Guanhe and Caohe. "Tang Huiyao": "In the fourth year of Chui Gong (688), a new canal was opened in Lianshui County, Sizhou, to connect Hai, Yi, Mi and other states, and then entered the Huaihe River in the south." "Miscellaneous Notes of Reading History": "Song and Yuan Fu In the early days (1098-1100), the Chuzhou Zhijia River was built in Huainan to connect Lianshui to Huainan, and was named Tonglian River, which is the predecessor of Yan River. In the 26th year of the reign of Emperor Kangxi of the Qing Dynasty (1687), dredging was carried out again to transport Huaibei salt for domestic sales, so it was named Yanhe or Yanyan River. Because it is located to the east of the Zhong Canal, it is also called the Lower Zhong River and the Wai River. Today's Yanhe River starts from the Huaiyin Water Conservancy Project in Huaiyin City, runs northeast, runs through Liutang River, Guanhe River, Xinyi River, Wutu River, Chexuan River, Gubo and Shanhou Rivers, reaches Xinpu in Lianyungang City, and merges with Linhong River. 175 kilometers long. Important towns passed along the way include Wangying Town in Huaiyin County, Zhu Pier in Lianshui County, Xin'an Town in Guannan County and Dayishan Town in Guanyun County.

This is the water quality report for the first quarter of 2009

The Salt River is the main sewage-receiving river in our region and has functions such as flood control and drainage, irrigation, shipping, and industrial and agricultural water use. This analysis report is compiled based on the monitoring results of Yanhe Power Station, Phosphate Fertilizer Plant, and Xindu in January and March 2009. Comparing with the division of surface water environmental functional zones, the Yanhe water environment assessment standard adopts the national "Surface Water Environmental Quality Standard (GB3838-2002)" Class III standard. The monitoring items include pH, dissolved oxygen, chemical oxygen demand, and permanganate. There are 25 items including salt index and ammonia nitrogen. The evaluation method adopts single factor evaluation method. The monitoring status is shown in Appendix Table 1.

From the statistical results, 13 items including volatile phenol, sulfide, hexavalent chromium and heavy metals were not detected; 11 items including dissolved oxygen, chemical oxygen demand, ammonia nitrogen and fluoride were in compliance with The "Surface Water Environmental Quality Standard" Category III standard; the total nitrogen project is the lake and reservoir standard and does not participate in the evaluation. Compared with the same period last year, the ammonia nitrogen concentration values ??at the power station, phosphate fertilizer plant, and Xindu sections increased by 0.091 mg/l, 0.426 mg/l, and 0.474 mg/l respectively, and the fecal coliform concentration values ??increased by 70% respectively. /l, 245/l, 220/l; the permanganate index concentration values ??decreased by 1.1 mg/l, 0.5mg/l, and 0.9 mg/l respectively, and the total phosphorus concentration values ??decreased by 0.014 mg/l and 0.014 mg/l respectively. 0.045 mg/l, 0.022 mg/l; the concentration monitoring values ??of other items are basically the same as last year.

According to the analysis of monitoring results, the pollution status of two pollution factors, ammonia nitrogen and fecal coliforms, has worsened compared with the previous year. This is because with the growth of population and advancement of urbanization, the discharge of domestic sewage has increased. It is on an upward trend, increasing the proportion of water pollution.

The water quality of the three sections of the Huaiyin section of the Yanhe River is generally improving. The main reasons are: first, the increasing awareness of environmental protection among the people and the production and rational use of phosphorus-free detergents. The second is the strengthening of environmental supervision and management, which requires enterprises to reduce or limit emissions as much as possible to achieve discharge standards and reduce the pollution load of the Yanhe water body.