Huixian special

Huixian city is located in the northwest of Henan Province, with latitude 3517 ′ ~ 35 50 ′ north and longitude113 23 ′ ~113 57 ′ east. It is located at the junction of Henan and Shanxi provinces, bordering Lingchuan County in Shanxi Province in the west, Linzhou City and Huguan County in Shanxi Province in the north, Weihui City in the east, Huojia County in the south, Xinxiang City and Xinxiang County in the southeast and Xiuwu County in the southwest. The urban area is 600 kilometers north of Beijing, 80 kilometers south of Zhengzhou and 20 kilometers southeast of Xinxiang. The western part of the city is close to Taihang Mountain, and the main peak of Jiufeng Mountain Cross Ridge is1732m above sea level. The total area of the city is 2007 square kilometers, including mountainous area 1007 square kilometers, hilly area 2 16 square kilometers and land area 784 square kilometers. It is located in the transition zone from the second-grade landform step to the third-grade landform step, and the terrain is stepped down from northwest to southeast, including deep mountain area, deep and low mountain area, hilly area, basin, piedmont inclined plain, plain and depression, with the lowest depression at an altitude of 72 meters. It belongs to the Weihe River system in Haihe River Basin, and the main rivers are Qihe River, Bai Quan River, Liudian River, Huang Shuihe River, Shimen River, Yu He River and Zhifanggou River. The middle route project of South-to-North Water Transfer Project, which is about to start, runs through the whole territory from west to east. Small and medium-sized reservoirs for flood control irrigation 19, of which Baoquan Reservoir has a storage capacity of130,000 cubic meters, with a maximum storage capacity of 382 10000 cubic meters; Shimen Reservoir has a total storage capacity of 30.84 million cubic meters; Sanchakou Reservoir has a storage capacity of 23.86 million cubic meters; The total storage capacity of Chen Jiayuan Reservoir is13.7 million cubic meters. Huibaoquan Reservoir, Shimen Reservoir, Chen Jiayuan Reservoir and Sanjiaokou Reservoir are first-class confluence channels with a total length of 86.5 kilometers, which can be adjusted according to water demand.

Climate huixian city is located at the junction of Taihang Mountain and North China Plain, which is a transitional zone from the north subtropical zone to the warm temperate zone, and belongs to the continental monsoon climate of the warm temperate zone. Due to the influence of mountains and altitudes, the monsoon effect is obvious, with windy spring and little rain, rainy and hot summer, cool autumn climate and cold and little snow in winter. The territory is divided into four climatic zones: the cold zone in the northwest of Central Shanxi with a short frost-free period and an average temperature below 65438 02℃; The annual average temperature in Nancun basin and shallow mountain temperate zone is12 ~14℃; In the warm foothills, the annual average temperature is about 65438 05℃; In the warm and humid areas of the plain, the annual average temperature is about 65438 04℃. According to the statistical analysis of meteorological data from 197 1 to 2000, it is the coldest month of 1 year, and the monthly average temperature is -0.6℃. It is the hottest in July, with an average monthly temperature of 27. 1℃. The extreme maximum temperature was 4 1.5℃, which appeared on1July 2, 992. The extreme minimum temperature is-18.3℃, appearing at 1990 65438+ 10/0/. The annual average accumulated temperature above 0℃ is 5202. 1℃, and that above 10℃ is 469 1.3℃. The average annual frost-free period is 2 14 days, with the longest being 239 days and the shortest being 194 days. The annual average sunshine hours are 2020. 1 hour, and the average sunshine percentage is 46%. There is plenty of sunshine from May to August, and the sunshine hours are the most in May, which is 225.0 hours. The annual average precipitation is 589. 1 mm, with the most precipitation in July, and the monthly average precipitation is182.3mm. The maximum daily precipitation 178.0mm appears in1981August 16. The annual average relative humidity is 68%, 7 and 8 are 79% and 80% respectively.