Geographical location of Yellow River Reservoir in Shuangfeng County

Shuangfeng County, which belongs to Loudi City, Hunan Province, was founded in 195 1, and was named after the two peaks in the county. Shuangfeng County is connected to Xiangtan and Hengshan in the east, Hengyang in the south, Shaodong and Lianyuan in the west and Loudi and Xiangxiang in the north. It is 6 1km wide from east to west and 59.2km long from north to south. Area 17 15. 14 km2, accounting for 0.8 1% of the total area of the province. The population is 958,000 (20 13). Shuangfeng county governs 13 towns and 3 townships. The county government is located in Yongfeng Town.

Shuangfeng county belongs to subtropical monsoon climate, with high terrain in the west and low terrain in the east, and alternating hills and plains. In 20 13 years, Shuangfeng county achieved a regional GDP of1706.9 billion yuan. Places of interest include Huang Chao, Fairy Temple, Yongfeng Bridge, Zeng Guofan's former residence and Cai Hesen Memorial Hall.

The landform of Shuangfeng county presents a three-dimensional outline with rising mountains around and alternating hills and plains in the middle. The landform types are the combination of contiguous mountains, staggered hills and plains. The central basin surrounded by mountains is very wide. The mountains in the east, southeast and northeast of the county are rolling, the t-U bucket in the west and the hills in the north are rolling. The highest in Shuangfeng County is Xiantang in Wei Zi in the east, and the lowest is Jiangkou Valley where Lianshui meets the water in the northeast, with a height difference of 754.8 meters. The low terrain in the middle of the week is convenient for the layout of water conservancy projects and the control of irrigation area, which creates conditions for the development and utilization of land resources.

Low altitude and gentle terrain. The land area below 300 meters above sea level accounts for 88.2%, and the slope below 30 degrees accounts for 80.5%, of which 68% is below 20 degrees.

Plain: It covers an area of 409. 1 km2, accounting for 23.9%, mainly distributed among hills in the middle, north and southwest.

Gangdi: covers an area of 340.9 square kilometers, accounting for 19.9%. It belongs to erosion and dissolution landform, and consists of marl, argillaceous limestone, granite and shale, mainly distributed between northwest, south margin and southeast mountains.

Hill: covers an area of 484.9 square kilometers, accounting for 28.4%. It belongs to erosion and dissolution landform, and consists of sandstone, limestone, metamorphic rock, granite and shale, mainly distributed between the northwest, southern margin and southeast mountains.

Mountainous area: covers an area of 447.4 square kilometers, accounting for 26. 1%, mainly distributed in the southeast and northeast, extending from southeast to northeast, forming the mountainous area in the east of the county.

climate

Shuangfeng County has a subtropical monsoon climate with four distinct seasons, frequent cold waves in spring and drastic temperature changes. The summer heat period is long and the summer drought is obvious; There are frequent droughts in the first autumn and changeable weather in the second autumn. Winter is short in cold period, with less cloudy eyes and more rainy days. The annual average temperature 17.0℃, annual precipitation 1200 ~ 1350mm, annual sunshine 1500 ~ 1600 hours and frost-free period of 260 ~ 300 days in Shuangfeng county.

Shuangfeng county is located in the watershed of Hunan and the capital, and is the upper reaches of the second and third tributaries of Xiangjiang River. The territory is divided into two major water systems, with Jiufeng Mountain, Niulizhai, Wei Zi and Baishifeng as the watershed, and Lianshui, Shuimo and Juanshui flowing through Shuangfeng County as the two major water systems. There are 49 rivers 5 kilometers long, with a total length of 655.6 kilometers. Among them, there are 42 Lianshui river systems with a drainage area of 1.503 square kilometers, accounting for 87.6% of the total area of Shuangfeng County. There are 7 juanshui river systems with a drainage area of 203 square kilometers, accounting for 1 1.85% of the total area of Shuangfeng county. The remaining 0.55% is distilled water system. The main river in the county is a first-class tributary of Lianshui, which enters from Wangcun, Qingshuping Town, flows through the side stone bridge, Meishuiqiao, Yongfeng, Wantou and Jietou, and flows into Lianshui at the estuary, with a total length of 105km, a domestic flow of 65.2km and a drainage area of 1347.3 km2, with an average gradient of 0.89‰, with an average of many years.