Luan River

Luan River

Luan River

A river in Hebei Province, China. It originates from the northern foothills of Bayan Gultu Mountain in the Zhangjiakou region of Hebei Province. The upper reaches, known as the Shandian River, flow through the Inner Mongolia Autonomous Region’s Duolun area, then turn southeast and are only called the Luan River after receiving the Xiao Luan River. The middle reaches run through the Yanshan mountainous region, successively receiving tributaries such as the Xingzhou River, Yixun-Wulie River, Parrot River (Rehe), Liu River, and Puh River in the Chengde area, and pass through the Great Wall at Xifengkou. The lower reaches receive the Qinglong River and split into several small streams near Leting, eventually flowing into the Bohai Bay through a delta about 50 kilometers (30 miles) wide. The total length is 885 kilometers, and the drainage area covers 44,600 square kilometers (17,220 square miles). The upper reaches flow through the Bashang Plateau, where the riverbed is wide and shallow, the current slow, and there are many wetlands along the banks. Below Chengde, small boats can navigate in summer. It was historically the only waterway for transporting military supplies to the Chengde area and also served as a trade route from various parts of Hebei to regions beyond the Great Wall. The middle reaches of the Luan River feature deep valleys and steep slopes with significant elevation drops, offering abundant hydropower resources. The Panjiakou Reservoir, with a capacity of 2.93 billion cubic meters, is built at the confluence of the Puh River and the Luan River. The Panjiakou Reservoir diverts water to alleviate water shortages in the cities of Tangshan and Tianjin via the Luanhe–Tianjin Water Diversion Project, which was completed in 1983.

The Luan River is located in northeastern Hebei Province, China. It originates from the northern foothills of Bayan Tug Mountain in Fengning Manchu Autonomous County, Hebei Province. After flowing into the Inner Mongolia Autonomous Region, it is called the Shandian River. Near Duolun County, the Shangdu River joins it, and it is then called the Da Luan River. After two turns, it re-enters Hebei Province and is named the Luan River after receiving the Xiao Luan River near Guojiatun. From there, the main stream flows southeastward, crossing the Yanshan Mountains and the eastern Hebei Plain, and finally empties into the Bohai Sea between Leting County and Changli County. The river is 833 kilometers long, with a drainage area of 44,900 square kilometers. Its river system is well-developed, with over 500 tributaries that have year-round water flow. Major tributaries include the Yixun River and the Qinglong River. The average annual runoff is 4.63 billion cubic meters, but distribution is uneven. The theoretical hydropower potential is 596,400 kilowatts. Due to relatively good vegetation cover in the basin, the sediment content of the river water (at the Luanxian Station) averages only 4.73 kilograms per cubic meter annually. The Panjiakou and Daheiting reservoirs have been built on the main stream. The 1983 Luanhe–Tianjin Diversion Project, stretching 234 kilometers, was the longest water diversion project in China (as of 1995), delivering an average of 810 million cubic meters of freshwater to Tianjin every year.

Due to excessive water diversion in the upper reaches, the lower reaches of the Luan River have frequently dried up over the past decade. Without the scouring effect of flowing water, sediment has rapidly accumulated, significantly raising the riverbed. In the event of major flooding, this will inevitably obstruct flood discharge, leading to severe damage.