Heyuan geography

The annual average temperature in Heyuan is 20.7℃, and the lowest in June is 1 1.6℃. The average temperature in July is the highest, reaching 28.0℃. According to the observation records of meteorological stations in this city for more than 50 years, the extreme maximum temperature in this city is 39.6℃, which occurred in July 1990 Longchuan. The extreme minimum temperature is -5.4℃, which occurred in Li Anping in June 65438+June 65438+June 0963. The number of high temperature days is increasing, while the number of low temperature days is decreasing.

The annual average precipitation of Heyuan 1768.9mm varies greatly during the year. The precipitation in Yuancheng 1959 is 3002.2 mm, which is the record of the largest precipitation in this city over the years. The precipitation in Zijin 1963 was 935.9mm, which was the youngest record in the city. 76% of the annual precipitation occurred from April to September, and the average precipitation from April to June reached 783.8 mm, accounting for 44.3% of the whole year, which was mainly caused by the low trough of the front. The average precipitation from July to September is 5665438±0.8mm, accounting for 365438 0.8% of the annual precipitation, which is mainly caused by tropical weather systems such as tropical cyclone, intertropical convergence zone and tropical depression. During the year, the monthly precipitation showed a single peak in the north and a double peak in the south-central. The average precipitation in June is the highest, reaching 307.8 mm, and the lowest is 65,438+February, with an average of only 36.5 mm The average annual precipitation (≥0. 1 mm) days are 154.3 days, showing the form of more in the north and less in the south, more in the west and less in the east.

The annual average sunshine hours in Heyuan are 1, 687.0 hours, with the most sunshine year of 2552.2 hours and the least sunshine year of 1, 654,38+0,79.8 hours, and the spatial distribution gradually decreases from south to north. The sunshine hours from February to April are relatively few, and the sunshine hours in July are the most in the whole year, with an average of 207.4 hours.

The annual average relative humidity of Heyuan is 77.4%, and the spatial distribution is high in the east and low in the west. In a year, the average relative humidity is relatively high from March to August, with the highest humidity of 82.8% in June and the lowest humidity of 69.6% in 65438+February. land resources

The total area of the city is 23.4629 million mu. Agricultural land is 2 1 12.63 mu (including cultivated land1998400 mu, garden land 347200 mu, woodland 18 1895438+0000 mu, pasture land 78400 mu and other agricultural land 5.

mineral resources

Heyuan city is rich in mineral resources, with many kinds and wide distribution. There are mainly iron, tungsten, lead, zinc, tin, titanium, uranium, fluorite, quartz stone, limestone for cement, ceramic soil, rare earth, building sand, geothermal water, mineral water and other minerals. Among them, the dominant minerals are: iron ore, tungsten ore, tin ore, limestone for cement, geothermal water, porcelain clay ore, rare earth ore, fluorite, quartz stone ore and so on. 56 minerals and 262 deposits have been discovered, including 36 minerals with proven reserves, 4 large deposits, 7 medium deposits/kloc-0 and 55 small deposits. The city's proven iron ore reserves are 270 million tons, accounting for 39% of the province's total. Among them, the Dading Iron Mine in Lianping County is the largest iron mine in the province, and the Zijin Baoshan Iron Mine is a medium-sized iron mine, which is a rare high-grade iron mine in China. The proven lead-zinc mine reserves are 300,000 tons of metallic lead and 600,000 tons of zinc, accounting for 5.8% and 6.8% of the whole province respectively, among which the zinc and lead reserves of Dajianshan lead-zinc mine in Lianping County are medium. The proven tungsten reserves are 1 10000 tons of tungsten oxide, accounting for 26.9% of the province, of which Shawankeng tungsten mine in Lianping County is the largest tungsten mine in the province. The proven limestone reserves are more than 200 million tons, accounting for 8.5% of the province; The proven reserves of porcelain clay are nearly 30 million tons, of which the proven reserves of porcelain clay mine in Dongyuan County are150,000 tons, ranking first in the city, and the quality of porcelain clay in Zijin Soviet Area and Longwo is equivalent to that in Jingdezhen, Jiangxi Province. The proven reserves of fluorite are 30 1 10,000 tons, accounting for 50.4% of the total in the province, among which the reserves of fluorite from Dongyuan to Kyrgyzstan are the first in the province, and after more than ten years of mining, the reserves are still10.5 million tons; The proven tin ore reserves are 14 10000 tons, of which Zijin Zhangtie tin mine and Ang Lee Pingxi Huashan tin mine have medium reserves; The proven rare earth reserves are nearly 80,000 tons, which occupies an important position in the province, among which the rare earth reserves of Heping Xiache, Changtang and Yousheng are medium; The proven reserves of quartz stone are nearly 200 million tons, of which Dongyuan quartz stone mine is a rare high-quality mine in the province. According to the current market price, the potential economic value of mineral resources in Heyuan City is about 654.38+0.20 billion yuan. Heyuan City is located in the northeast of Guangdong Province, in the middle and upper reaches of Dongjiang River, Hanjiang River and Beijiang River. The total area of the city is 1.58 million square kilometers, of which Dongjiang River basin accounts for 8 1.6%, Hanjiang River basin accounts for 1.4% and Beijiang River basin accounts for 2%. There are many rivers in the city, and there are 47 rivers with rainfall collection area exceeding 100 square kilometers, including 39 Dongjiang, 6 Hanjiang and 2 Beijiang. Rivers with rainfall collection area exceeding 1 1,000 square kilometers include Anyuan River, Lianjiang River, Xinfengjiang River, Tangchuan River, Qiu Jiang and Dongjiang River. Heyuan city is rich in water resources, with annual average rainfall 1500 ~ 2000mm and annual average runoff1565438+300 million cubic meters. The city's per capita water resources are 4500 cubic meters, about twice that of the whole country and the whole province. Xinfengjiang Reservoir is the largest reservoir in South China, with a storage capacity of 654.38+03.9 billion cubic meters. Abundant water contains abundant hydraulic resources. The theoretical reserve of hydraulic resources in the city is 654.38+0.498 million kilowatts, accounting for 654.38+0.8% of the whole province. Among them, the exploitable hydropower resources can reach 1 143000 kilowatts. By the end of 2007, the installed capacity of hydropower in the city had reached 795,600 kilowatts, and there were still 347,900 kilowatts of hydropower resources available for development. The quality of water environment in Heyuan city is very good. The water quality of the source section of Dongjiang River has reached the national Class II standard for surface water, while the water quality of Xinfengjiang and Fengshuba reservoirs has been kept at Class I standard, which has the advantage of "no one has me, no one has me".

Vegetation and biological resources

Heyuan city is rich in light, heat and water resources, and there are many kinds of animals and plants. There are 280 families, 1645 genera and 7055 species of wild plants. There are 633 species of cultivated plants, belonging to11family 36 1 genus; Fungi 1959 species, including edible fungi 185 species and medicinal fungi 97 species. Plant species include Alsophila spinulosa, Taxodium ascendens and other national first-class protected plants, and Taxus chinensis and other national second-class protected plants. There are 829 species of terrestrial vertebrates in the city, including mammals 124, birds10, reptiles 145 and amphibians. There are pythons under national first-class protection, golden cats, water deer, pangolins, macaques and silver pheasants under national second-class protection. Among the vegetation types, there are zonal vegetation in northern tropical monsoon forest, monsoon evergreen broad-leaved forest in southern subtropical zone, typical evergreen broad-leaved forest in central subtropical zone and coastal tropical mangrove forest, as well as zonal evergreen deciduous broad-leaved mixed forest, evergreen coniferous forest, bamboo forest, shrub slope and cultivated vegetation such as rice, sugarcane and tea garden in northern latitude. The city focuses on the development of southern medicine tree species, mainly cinnamon and ginkgo, with longan, litchi, chestnut, persimmon, plum, sweet orange, plum, kiwifruit and other local economic forests as the main features. Heyuan has established 27 nature reserves at all levels, including 7 at the provincial level, 0 at the municipal level and 9 at the county level, covering an area of 2.9 million mu, accounting for 1 2.4% of the city's land area. There are 4 forest parks at all levels, including national 1, provincial 1 and 2 cities and counties, with an area of 1.25 million mu.