What are the climatic characteristics of Qionghai?

Qionghai belongs to the northern edge of tropical monsoon climate zone, which is greatly influenced by monsoon, with abundant sunshine, high temperature and rainy weather, frequent typhoons, inconspicuous four seasons and distinct rainy season in dry season.

The dry season generally occurs from 65438+February to April of the following year. The monthly average rainfall is 67mm, the minimum rainfall is 39.2mm in June+10/October in 5438, and the total rainfall is 335.8mm. It only accounts for 16.4% of the annual average rainfall of 2042.6mm. The maximum rainfall in dry season is 1953 576 mm, and the minimum rainfall is/kloc-.

The rainy season occurs in May ~165438+1October. The average monthly rainfall is 243.8 mm, and the highest in September is 388.3 mm. The total rainfall is 1706.8 mm, accounting for 83.6% of the annual average rainfall. The rainfall in August and September is 678.8 mm, accounting for 33. 1% of the annual average rainfall, which is equivalent to double the dry season.

The temperature changes little throughout the year. In the coldest winter (from 65438+February to February of the following year), the temperature is 24℃ lower than the annual average temperature and 3.8 ~ 6.0℃ lower. Affected by cold air, there are occasional low temperature and rainy weather and occasional severe cold, but the extreme low temperature is above 5.0℃ every day, with short time and little frequency. In spring (March-May), the temperature rises rapidly, with an average monthly temperature of 24.9℃. During the spring equinox to Tomb-Sweeping Day, there are usually three or five days of low temperature and rainy weather, commonly known as "Qingming Wind". In May, the temperature rose to 27.5℃, and high temperature weather began to appear. Summer (June-August) is the year-round high temperature season, with an average monthly temperature of 27.9℃. The average temperature in the hottest July is 28.2℃, which is 4.2℃ higher than the annual average temperature, and the extreme high temperature day is 39.8℃, with occasional "dry hot wind". In August, typhoons and rainstorms increased and the temperature dropped slightly. In autumn (September ~165438+1October), typhoon rainstorm is frequent, and the monthly average temperature drops to 24.2℃. Before and after the cold dew, the weather turns cold, and sometimes there will be three or five days of low temperature weather, commonly known as "cold dew wind." The average monthly temperature in autumn is similar to that in spring, but the difference is that autumn changes from high temperature and rainy to low temperature and little rain, while spring is the opposite.

It is hot and rainy all year round, creating good growth conditions for crops. However, the unfavorable factor is the uneven distribution of rainfall, which is prone to droughts and floods; Coupled with disasters such as wind damage (Qingming wind, dry hot wind, typhoon, cold dew wind) and cold damage (low temperature and rainy weather), it has a certain impact on crops.

Qionghai geology and geomorphology

geology

Qionghai is located in the east of Indosinian Uplift in Hainan, where the Yangtze River-Qionghai East-West Structural Belt and Qiongdong North-South Fault Zone meet. The main folds and fractures are:

Gaoming-Jiuqujiang Anticline: It is distributed in Gaoming-Jiuqujiang, and the stratum consists of Ordovician-Silurian. It is banded, with an anticline axis of 60 ~ 70 and a dip angle of its wings of about 60. It is characterized by closed linear folds.

Shangcun-Xianggou syncline: distributed in Shangcun-Xianggou area, it is composed of Carboniferous-Permian system, with axis of 45, dip angle of southeast wing of 48 and dip angle of northwest wing of 50, which is a linear fold.

Wanling-Shanxinling syncline: distributed from Wanling to Shanxinling, it is composed of lower Cretaceous strata, with an axis of 55 and a dip angle of both wings of10 ~ 20, which is an open fold.

The east-west structural belt from the Yangtze River to this county: it runs through the middle of the county. It is mainly manifested in the east-west distribution of granite and residual metamorphic rocks in Yangjiang basin and its belt, and the aeromagnetic anomaly zone in the belt is also east-west distribution.

Qiongdong North-South Fault Zone: It runs through the eastern part of the county. The main manifestations are that the major axes of Yanshanian granodiorite, adamellite and granite porphyry are in the north-south direction, the Quaternary basalt in the north of Jiaji Town extends in the north-south direction, the tributaries of Dalu, Tayang and Nanzhai Wanquan River flow in the north-south direction, and there are high gravity zones on both sides of the fault zone.

Malong-Longjiang fault: It passes through Xizhai, Longjiang and Wuyuan, with a length of more than 60 kilometers. The northeast section strikes 40, and the southwest section strikes 65 ~ 85. The fault cut the Lower Cretaceous, developed a structural breccia zone, and controlled the southeast boundary of Quaternary basalt quilt.

topography

Qionghai faces the sea on the back of the mountain, and the remaining veins of Murui Mountain extend from west to east, which constitutes the feature that the whole terrain inclines from west to east. The west and southwest are mountainous and semi-mountainous areas, covering an area of 347.06 square kilometers, accounting for 20.5%; Terraces and hills cover the central and northern parts, covering an area of 7 14.44 square kilometers, accounting for 42.2%; The southeast is a plain with an area of 567. 15 square kilometers, accounting for 33.5%. The water area is 64.32 square kilometers, accounting for 3.8%. Baimaling is the highest point in the county, with an altitude of1264.4m.. Wanquan River flows through 10 town from west to east, and then flows into the South China Sea.

The denudation landform of middle and low mountains is distributed at the top of Daluoling, the upper section from Baimaling to Tuanling near the peak and Leigongling on the southwest border of the county. The altitude is 500 ~ 1064m, and the relative height difference is 450 ~ 760m. The bedrock is Ordovician-Silurian shallow metamorphic rocks, Variscan-Indosinian mixed granite and early Yanshanian adamellite. The top of the mountain is dome-shaped, and the hillside is concave with V-shaped gullies. The area is 32,400 mu, accounting for 1.27% of the total area.

The denudation wavy plains are widely distributed in Yangjiang, Zhongyuan and Wenquan areas south of Wanquan River, with a slight tilt to the east, while Luonan, Dongsheng Farm, Wanquan and Jiaji towns and Tang Yan, Changpo, Tayang and Chaoyang in the north are tilted to the south and southeast respectively. Altitude 10 ~ 100 meters, with a relative height difference of 5 ~ 59 meters. The bedrock is mainly Ordovician-Silurian, Lower Cretaceous, Ling Wen Formation, Carboniferous-Permian, Variscan-Indosinian mixed granite and early Yanshanian granite. On the plain, meanders develop and there are many residual hills. The area is 665,800 mu, accounting for 26.2%.

Marine landforms are distributed in the coastal areas of Jiayu, Hot Springs and Jiuqu River in the east of Wen Yuan. 0 ~ 30 meters above sea level. The strata are Quaternary loose marine sediments, generally parallel to the coastline or distributed along the coastal zone, and slightly inclined to the sea. It covers an area of 259,300 mu, accounting for 10.2%, including 229,400 mu of shallow sea sediments, accounting for 9.0%.

River erosion and accumulation landforms are distributed along the banks of the river and Wanquan estuary. 0.5 ~ 20 meters above sea level. The strata include the first terrace of the river and the Quaternary loose sediments in the estuary delta. The terrace is 400 ~ 4600 meters wide and slightly inclined to the river bed. The area is 243,300 mu, accounting for 9.6%.

Qionghai scenic spot

Red women soldiers Memorial Hall

The Red Women Soldiers Memorial Park commemorates the birth of the "Special Service Company of the Women's Army of the Second Independent Division of the Chinese Workers and Peasants Red Army"-red.

Female soldiers, and specially built a large-scale cultural tourist attractions.

Red women soldiers Memorial Park is located at the entrance of Qionghai Guantang, the eastern expressway, 93km away from Haikou meilan airport and 160km away from Sanya Phoenix Airport. Covering an area of 200 mu, the park is a large-scale cultural tourist attraction integrating tropical gardens, large-scale theme sculptures, reliefs and wonderful song and dance performances. The memorial garden is mainly composed of four functional areas: the scenic spot in front of the garden, the theme sculpture exhibition area, the tropical garden scenic spot and the tourist service area. There are Peace Square, Memorial Square, Female Soldiers Company, Song and Dance Square, Coconut Forest Village, Nanbatian Former Residence (Fu Nan), Memorial Hall and other attractions in the park.

Memorial Park was opened in May 2000, and 200 1 was rated as "National Patriotism Education Demonstration Base" by the Propaganda Department of the CPC. In July, 2004, it was awarded as "Advanced Unit of National Patriotism Education Demonstration Base" by the Propaganda Department of the CPC, the Ministry of Civil Affairs and the Ministry of Culture. In 2005, it was rated as a national classic red tourism scenic spot by the National Development and Reform Commission, Publicity Department of the Communist Party of China, National Tourism Administration and Ministry of Civil Affairs, and included in the list of 30 national red tourism boutique routes.

Dai Yu Beach

Dai Yu Beach is a naturally formed beach peninsula with a long and narrow terrain. It is located in Boao, Hainan, with the South China Sea on the outside and Wanquan River on the inside. Dai Yu Beach is 8.5 kilometers long, just like the Gold Coast in Australia and Cancun in Mexico.

Site of Boao Forum for Asia

Boao is the permanent venue of the Asia Forum, a famous international conference organization. The transportation is convenient, the communication is developed, and the infrastructure is gradually improved.

Ok, there are 7-star hotels such as Sofitel and Gold Coast Hot Spring Hotel, and 2 development zones. The development zones are Boao Binhai Tourism Development Zone and Boao Shuicheng International Exhibition and Leisure Resort respectively. The permanent meeting place of "Asia Forum" is located in the center of Boao Shuicheng International Convention and Exhibition Resort. The scenic spot has been successively rated as "Top Ten Tourist Areas in Hainan Province", "Excellent Foreign Tourists in Hainan Province" and "Tourism Demonstration Sites of Civilized Scenic Spots in Hainan Province". The "Dai Yu Beach" in the East is listed in the Guinness Book of World Records. In the embrace of mountains and rivers, there is a Shamei inland sea with perfect ecological protection on the water surface; Wanquan River, Longgun River and Jiuqu River meet; Dongyu Island, Shapo Island and Yuanyang Island are opposite; Jinniuling, Tianyongling and Longtanling are surrounded by three ridges.

Wan Chuan R.

Wanquan River used to be called Bai Quan River. It is a river in the southeast of Hainan Island in China. There are two sources: Le Hui, the southern branch, is the main stream, with a length of 109 km, originating from Nanling, Beilin Village, Wuzhishan. Ding 'an Water originates from Lingnan, Limu, and is a branch of the north. The two waters meet at the mouth of qionghai city River, which is called Wanquan River, and pass through Jiaji to Boao and enter the South China Sea. The total length is 163km, and the drainage area is 3,683km2. The upper reaches are high mountains, which flow through deep valleys. After crossing the mouth, the river widens and the water flows smoothly. The total drop is 523 meters, and the water energy reserve is 263,000. The mouth of the river is gourd-shaped, with a pincer mouth and a width of about 100 m. The navigable river channel is about 73 kilometers. Wanquan River is the third largest river in Hainan Island, which originates from Wuzhishan. Wanquan River is an unpolluted tropical river in China, with beautiful ecological environment, and is known as the "Amazon River" in China. On both sides of the upper reaches of Wanquan River, the mountains are undulating, the peaks stand on the wall, and the trees are towering, majestic and steep. There are vast and desolate tropical natural forest reserves, 1906 yuan, "Qiong 'an Rubber Garden" founded by Wanhe Qionglinshu, Chongwen Township, County, the former site of Qiongya Longjiang Revolution, and stone carvings on Shihushan Cliff.

Baishiling

Baishiling is located in the southwest of qionghai city 12km, with a total area of about 16.24km2, and consists of Denggaoling and other mountains. Denggaoling is the highest peak of Baishiling, with an altitude of 328 meters. There are 1308 grades in the ridge, and the stone steps are attached to the cliff, which gives you a considerable view of "Eight Scenes of Baishiling" and the scenery of Wanquan River.

The eight scenic spots in Baishiling are: the stone pillars on the top of the sky, the golden bell riding on the hood, the green lion gazing at the eyes, the emerald screen embracing the moon, the Kongtong sieve wind, the buffalo spray, the colorful granite and the green marsh hiding clouds. Climbing 300 steps from the "Kongtong Screen" is the best landscape of Baishiling, "Stone Column Sky". Wang Chongyou, a local juror in the Qing Dynasty, said in a poem: "The towering mountains are in the wilderness, with bright colors and purple.