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General situation of Beiliu River basin

The drainage area in Rong County is 355 1 km2, the trunk length is 74 km, the river width is 600 meters, and the narrowest part is more than 60 meters. The slope is between11/2000, and the natural drop is 34m. According to the observation of county hydrological station, the average flow for many years is 10 1 m3/s, the maximum flow is 3490 m3/s, the minimum flow is 1.43 m3/s, and the annual runoff is 326455.6m3.. From the period of the Republic of China to the early liberation, Jiang Xiuhe could pass sailboats and small motor passenger ships flowing from the north to Wuzhou. Since the late 1960s, due to the increase of reservoirs year by year, the forest vegetation has been destroyed, and the river flow has been significantly reduced. During the rainstorm, the phenomenon of surge and fall has become increasingly serious. After the 1970s, a barrage was built downstream, and wooden boats could not pass through. 1988 built Langshui Power Station, 1990 built Rongcheng Power Station by damming the east reach. Rongcheng-Yangmei River estuary 10 km has become an artificial lake with an average water depth of more than 2 meters.

The maximum discharge measured at Jinji Hydrological Station in tengxian is 6830m3/s (1August 4th, 970) and the minimum discharge is1.20m3/s (198065438+1October 7th). (Measured on March 27th, 199 1,10.80m3/s). The territory is 82.50 kilometers long, the water surface area is 27.68 square kilometers, the drainage area is 904.96 square kilometers, the gradient is 0.40‰, the natural drop is 32.50 meters, and the theoretical hydropower reserve is 57,500 kilowatts. It can develop 3 1.6 million kilowatts. The annual average sediment concentration is 0.492kg/m3, and the annual maximum sediment concentration is 0.655438+0kg/m3. The average sediment transport for many years is 3.73 million tons. In ancient times, it was the main road leading to Hainan. There were Jinji Post, Shuangjing Post and Doujia Post along the river. Su Dongpo was demoted to Danzhou in the Song Dynasty, so he went upstream. The river is winding and there are many dangerous beaches. In the village where Qiqi lives, there are Shicheng Beach and hidden stones like a city. There is also the Gate of Hell, which is a narrow river in China with a width of more than 80 meters. Jinji Jiaotang has a middle cellar beach, and Shiyu stands in the middle stream. In the second year of Apocalypse (1622), it was cut straight. The island is engraved with "split in the second year of the apocalypse" and "pit opening in the second year of the apocalypse". 1autumn of 966, a waterwheel pumping station was established here. There are five first-class tributaries with a basin area of more than 50 square kilometers: Ross, Huangsha, Huanghua, Yichang and Guliao; 10-49 square kilometers with 8 first-class tributaries: Liu He, Longfeng, Luotang, Hantang, Gucci, Xinzhong, Tao Dong and Maoer River; There are two tributaries of 5 ~ 9 square kilometers: Wentang and Stan River.