Geographical environment of Xinning county

Xinning County is located in the southwest border of Hunan, with Dongan in the east, Chengbu in the west and quanzhou county, Ziyuan County, Wugang City and Shaoyang City in the south. East longitude11018' ~10 28', north latitude 26 15'~ 26 55'. The mountains in the southwest and southeast of Xinning County are high and steep. The central part is low and flat, the hills in the northwest are all over, and the mouth of the northeast valley is open; The flowing water erosion is obvious, the surface cutting is strong, and the erosion accumulation landform is developed. Generally speaking, topography can be divided into four types: mountains, hills, hills and plains.

hilly area

The total area of peak heights above 400 meters above sea level in the county is 1827.7 1 km2, accounting for 64.997% of the total area. Among them, the area of low mountains and hills with an altitude of 400-600 meters and a slope of 25-30 degrees is 539.2 square kilometers, accounting for 29. 5% of the mountainous areas are mainly distributed in the mountainous areas where the northwest meets the hills. Sand shale is a low mountain and hill, distributed in Yancun-Gao Qiao line; ● Limestone mountain area, distributed in Xiaogan, Liyang, Xunchang, Dongtou, Yancun, Shijiao, Xichong, Tang Wan, Sanguan, Zhu Fang, Jianguang in Shui Miao and Daping in Feng Wan; Red glutenite is a low mountain, distributed in Jishan-Shi Yao and other places.

hills

The hilly land between 260-400 meters above sea level in the county is mainly distributed at the edge of the valley in the northwest and northeast, covering an area of 554. 44 square kilometers, accounting for 19.72% of the county's total area.

Non-irrigated farmland in hilly countryside

The county slopes are mainly distributed at the edge of Fuyi River Valley, the transition zone between plain and hills and mountains, and also scattered in the hilly areas in the northwest, with an area of 143.2 square kilometers, accounting for 5. 1% of the total area of the county. It is characterized by weak cutting and gentle fluctuation, mostly flat-topped hills.

plain

Valley Plain appears in China, mostly distributed along Fuyi and its eight main tributaries in the form of beaded branches, and was once produced in Jinfeng, Baisha, Jionglong Temple, Shui Miao, Feixianqiao, Yidushui, Xuntian, Tang Wei and other towns. Represented by the 45km long and 8km wide faulted basin along the Ziyuan-Xinning fault, there are five ridges, such as Changhu, Xinzhai, Penxi, Shuitou and Baisha, covering an area of173.55km2, accounting for 6. 17% of the county's total area. It is composed of Quaternary Holocene alluvium, and the lower part is gravel layer. The elevation is lower than 2 10 m, the slope is less than 5 degrees, and the residual hills in the basin fluctuate. The ground is open, and the karst basin is surrounded by low mountains and hills. The complex intermountain basins that constitute karst accumulation have basically been reclaimed except for some floodplain sandbars. Xinning County belongs to the humid subtropical monsoon climate zone, with mild climate, sufficient light and heat, abundant water resources, distinct seasons and obvious vertical distribution. Xinning county has the most rain in spring, accounting for 36. 2% of the whole year, and the sunshine hours only account for 20% of the whole year, with continuous rain. Summer rainfall accounts for 30. 9%, but the sunshine hours accounted for 4 1% of the whole year. In addition, the high temperature and strong south wind are prone to summer drought. Autumn rainfall only accounts for 19.3% of the whole year, and old sunshine hours account for 25% of the whole year. Autumn is often sunny, but autumn drought often occurs. The rainfall in winter only accounts for 13.7% of the whole year, while the sunshine hours only account for 14% of the whole year. The intensity of precipitation in winter is small, cloudy with light rain or light rain and snow.

There are too many rainstorms in Xinning County from April to June, with concentrated rainfall, and the total rainfall in three months accounts for 42% of the whole year. From late June to early July, the subtropical high began to be controlled and the rainy season ended. From July to September, the temperature is high, the south wind is strong and evaporation is strong. There is often drought in summer and autumn, even in summer and autumn. The annual average actual sunshine hours in the county are 1465.6 hours, with sunshine hours of 4,434.5 hours and sunshine percentage of 33%. The annual total solar radiation in the county is 103.47 kcal/cm2, and the physiological radiation or photosynthetic effective radiation is 573 kcal/cm2. The average annual evaporation in the county is 1428.2 mm, and the average annual air pressure in the county is 980 hectopascals. There are 872 species of animal resources belonging to 2 12 families in Xinning county. Among them are musk deer, macaque, abalone carp, leopard, crested deer, water deer, original cat, macaque, red-bellied pheasant and so on. There are 5645 species of plant resources in 465 families. Among them, there are three kinds of national second-class protected tree species, such as Ginkgo biloba and Lengyi 13, and 22 kinds of national third-class protected tree species, such as Tieyi Longbao and Fokienia hodginsii. There are 2 13 kinds of Chinese herbal medicine resources, including 28 kinds of national first-class and second-class medicinal materials.

There are 334 genera and 9 17 species of woody plants in Xinning county, including 4 19 species in precious trees and 40 rare trees in ancient times. The county's forest stock is 4.652 million cubic meters, with 30 million bamboos, and the forest coverage rate is 62.6%. Xinning county is not only the base county of 30 timber forests in the province, but also the base county of 10 special pits, paper-making forests and fast-growing forests. In 20 12, the total industrial output value of Xinning county was 4.57 billion yuan, of which the total industrial output value of 38 industrial enterprises above designated size was 3.759 billion yuan. Industrial added value10.274 billion yuan, up by 12.7%, of which industrial added value165438+300 million yuan, up by 15.3%.

In 20 12, the raw iron ore output of industrial enterprises above designated size in the county was 304,927 tons, an increase of 28.25%; The metallic antimony content is 36,448 tons, increasing by13.9%; Canned 3434 1 ton, an increase of 24.56%; Furniture 142298 pieces, up13.45% year-on-year; 392,292 tons of cement, up 35.7%; Ferroalloy 55,244 tons, an increase of 27.58%; The power generation was 628.86 million kWh, an increase of 24.75438+0%; Fruit juice 17 1 19 tons, up by 34.98%; 40 173 pieces of leather garments, an increase of14.7%; Machine-made paper and paperboard 13478 tons, up by 49.56%.

In 20 12, the main business income of industrial enterprises above designated size in Xinning county was 3.676 billion yuan, a year-on-year increase of 20.9%; The total profit was 65.438+0.76 billion yuan, a year-on-year increase of 65.438+0.3.97%; The comprehensive economic benefit index of industrial enterprises above designated size reached 268.08%, up 5.28 percentage points year-on-year. The production and marketing of industrial products are well connected, and the production and marketing rate is 98.63%.

In 20 12 years, the added value of the construction industry in Xinning county was 3606 1 10,000 yuan, an increase of 26%, accounting for 22% of the secondary industry. Six construction enterprises with first-class qualification or above signed contracts with a total value of 569 million yuan and a total output value of 487 million yuan. At the end of 20 12, there were 52 health institutions in Xinning county, with health technicians 1737 and beds 1672, with total assets of 310.89 million yuan, an increase of 12.34%, and total medical treatment visits of 24,258.