Lingyuan geographical environment

Lingyuan city is located in the middle of mountainous and hilly terrain in western Liaoning, and belongs to the first-class terrain area of mountainous plateau in North China. Low mountains and hills are widely distributed in the territory, and valleys and basins alternate with each other, which has the geomorphological characteristics of parallel valleys. The terrain inclines from west to east, with a slight uplift in the middle. The highest point is in the south, the main peak of Hongshilai is at an altitude of 1256.6m, and the lowest point is at the exit of South qinglong river, at an altitude of 290m, with an average altitude of 552.1m.

Mountainous area, with an area of 1983.3 square kilometers, accounting for 60.5% of the total area, belongs to the branches and residual veins of Nuru Erhu Mountain, seven old Tushan Mountain, Yanshan Mountain and Songling Mountain; Hills, with an area of 842.4 square kilometers, accounting for 25.7% of the total area, are mainly distributed in the periphery of mountains and on the edge of basins and valleys, and most of them are concentrated in the north, east and south; The basin covers an area of 452.3 square kilometers, accounting for 13.8% of the total area. There are four basins with large area: Xiaochengzi-Wanyuandian Basin, Sanjiazi Basin, Siguanyingzi Basin and Sanjiazi Basin; There are four river valleys in the territory: the west branch of Daling River, Qinglong River, Infiltration River and Golden Belt River. Lingyuan city is located in the mid-latitude temperate continental monsoon climate zone, with long dry and cold period, large spring and autumn monsoon, concentrated rainfall, abundant sunshine and distinct four seasons. The area is mainly low mountains and hills. North and south span nearly one latitude, and east and west are separated by nearly one longitude. There are many low mountains and hills in the territory, and the terrain is inclined from west to east, high in the middle and low around. The complex landform distribution makes the distribution of climate resources in Lingyuan complex and diverse; There is a certain climate difference from south to north. But the light resources in the north and south are extremely rich, and the heat resources in the south are higher than those in the north. There are more water resources and abundant wind energy resources in the south than in the north. Lingyuan belongs to semi-arid and semi-dry climate. There is little rain and dryness in spring, and there are different degrees of spring drought every year; Summer is hot and rainy, with occasional local heavy rains and flash floods; Autumn is crisp, autumn is crisp; Winter is cold, dry and long, accompanied by the north wind.

temperature

The annual average temperature in Lingyuan is 8.7℃, the hottest in July, the monthly average temperature is 24.0℃, the coldest period appears in 65438+ 10, and the monthly average temperature is -9.5℃. The annual average maximum temperature 18.0℃ and the annual average minimum temperature (extreme maximum temperature appeared in July 2000 14, the temperature was 43.3℃, and extreme minimum temperature appeared in June 1990, June 3 1, and June 54306). The accumulated temperature of ≥ 10℃ over the years is 3443. 1℃, and the weather of ≥35℃ for many years appears 6 1 day; The frost-free period is130-160 days.

deposit

The average precipitation over the years is 479.4 mm, which gradually decreases from south to north. The maximum annual precipitation is 654.2 mm, which appears in1994; The minimum annual precipitation is 32 1.0mm, appearing at1999; The maximum daily precipitation is 13 1.9mm, which occurs in1July 1994 13, followed by July 2005124.7mm. The annual precipitation is mainly concentrated in summer. The precipitation from June to August accounts for about 60-75% of the total annual precipitation, which is the rainy season and flood season of Lingyuan.

sunlight

The annual sunshine hours in Lingyuan are 2748.438+0 hours.

wind

The annual gale (≥6) in China averages 60- 120 days, but the annual average wind speed is only 2.4m/s ... Animal resources.

By the end of 20 13, 395 species of vertebrates were found in lingyuan city, including 37 species of fish, 5 species of amphibians, 6 species of reptiles/kloc-0, 295 species of birds and 42 species of mammals, belonging to 5 classes, 78 orders and 8 1 family. There are five kinds of wild animals under national first-class protection, such as bustard, oriental white stork, black stork, golden eagle and leopard. There are 4 1 species of national second-class protected wild animals, including goshawk, giant owl, bald heron, red-footed falcon, long-eared owl and so on. There are 52 species of key protected wild animals in Liaoning Province, such as China Rana chensinensis, crested lark, lark, pheasant and roe deer. There are 254 kinds of "three haves" (protective value, scientific research value and economic value) animals.

plant resources

By the end of 20 13, there were 748 species of vascular plants in lingyuan city, belonging to 98 families and 335 genera, including ferns 1 1 7 species and seed plants 73 1 species, belonging to 88 families and 324 genera, including woody plants 52 families. Fungal resources are abundant, and there are more than 90 species of large fungal plants alone. There are 9 species of wild plants under national second-class protection, such as Juglans mandshurica, Fraxinus mandshurica, Tilia amurensis, Astragalus membranaceus and wild soybean, and 2 species of Berberis mongolica and Quercus mongolica in precious trees.

Representative plants are Pinus tabulaeformis, Platycladus orientalis, Quercus mongolica, Quercus liaotungensis, Quercus forest, lobular forest, Fraxinus mandshurica, Prunus armeniaca, Robinia pseudoacacia, Willows, Vitex negundo, grasshopper legs, Rhododendron rhododendron, Syringa oblata, Leymus chinensis, Calophyllum angustifolia and Carex.

There are more than 80 kinds of medicinal plants/kloc-0 in plant resources, such as Glycyrrhiza uralensis Fisch, Saposhnikovia divaricata, Scutellaria baicalensis Georgi, Astragalus membranaceus, polygala tenuifolia, Sanguisorba officinalis, Polygonatum odoratum, Paeonia lactiflora, Dioscorea nipponica Makino and Leonurus japonicus. There are more than 65,438+000 kinds of ornamental plants in the garden, such as Selaginella, Platycladus orientalis, Rhododendron argenteum, Brocade, various Spiraea, Fraxinus microphylla, Plum in Jingshan and Acer truncatum. Feed plants are: Shan Ye pea, Elymus dahuricus, Sophora japonica, Cryptomeria japonica, Poa pratensis, etc. Wild vegetable plants 15 species, such as bracken, purslane, wild leek, onion, bitter herb, dandelion, etc. Wild fruits and dried fruits include Vitex negundo, Vitex negundo, Prunus armeniaca, Prunus humilis, Juglans mandshurica, hazelnut and so on. In 20 10, the total agricultural output value reached 4.8 billion yuan, an increase of 20% over 2009; Add 710.4 million mu of protected land to realize the goal of "one household and one shed"; In the past five years, 258 provincial-level standardized animal husbandry communities have been built, 3,000 large-scale farms have been developed, and 230,000 mu of economic forests have been developed. Thousands of acres of vegetables have passed the national organic food certification, and the number of agricultural enterprises above designated size has grown to 23.

By 20 1 1 year, the city's cultivated land area will be 7 1 10,000 mu, of which the area of protected vegetables and flowers will reach16500 mu, with an annual output of 500,000 tons of vegetables. It is the largest off-season pollution-free vegetable production base, sales distribution center and provincial demonstration base of superior agricultural products in northern China. In 2004, the number of pigs, cattle, sheep and poultry reached 409,000, 15.9, 4 17 million and 5.5 million respectively. The economic forest dominated by "two apricots and one jujube" has grown to 6.5438+0.05 million mu, which is an advanced county in economic forest construction and one of the four major bitter almond production bases in China. Efficient agriculture develops 50,000 mu of high-quality rice and wheat, 300,000 mu of high-quality corn and 65,438+10,000 mu of high-quality miscellaneous grains base. In 20 13, six regional central nursing homes were built in lingyuan city, and the number of rural five-guarantee recipients in lingyuan city reached 2,734. We will intensify the construction of affordable housing for disadvantaged groups, * * * transform 690 sets of dilapidated houses for disadvantaged groups in rural areas, and build 604 sets of low-rent housing and affordable housing in cities and towns, effectively improving the housing conditions for disadvantaged groups.