Climatic Characteristics of Qionghai
Qionghai belongs to the northern edge of the tropical monsoon climate zone, which is influenced by the monsoon winds, with plenty of sunshine, high temperature and rainy weather, frequent typhoons, and the four seasons are not obvious, with the dry season and the rainy season being distinct.
The dry season, generally occurring from December to April. The average monthly rainfall is 67 millimeters, with a minimum of 39.2 millimeters in January, totaling 335.8 millimeters. This represents only 16.4% of the annual average rainfall of 2042.6 mm. The most rainfall in the dry season was 576 mm in 1953 and the least rainfall was 121 mm in 1955.
The rainy season, occurs from May to November. The average monthly rainfall is 243.8 millimeters, with a maximum of 388.3 millimeters in September, totaling 1,706.8 millimeters, or 83.6% of the average annual rainfall. The total rainfall of 1706.8 mm, or 83.6% of the average annual rainfall, was 678.8 mm in August and September, accounting for 33.1% of the average annual rainfall, which is twice as much as in the dry season.
The four seasons show little change in temperature, with the coldest winter (December to February) being between 3.8 and 6.0 degrees Celsius lower than the average annual temperature of 24 degrees Celsius. Under the influence of cold air, there are occasional low-temperature rainy weather, occasionally cold, but the extreme low-temperature days are above 5.0 ℃, and the time is short, not many times. Spring (March to May) temperature rebound quickly, the average monthly temperature of 24.9 ℃. During the spring equinox to Ching Ming, there are three or five days of low temperature and rainy weather, commonly known as "Ching Ming wind". 27.5 ℃ in May, the temperature rises, the beginning of high temperature weather. Summer (June to August) for the annual high temperature season, the average monthly temperature of 27.9 ℃, the hottest July average temperature of 28.2 ℃, 4.2 ℃ higher than the average annual temperature, extreme high temperature day of 39.8 ℃, occasional "hot and dry winds" appeared in August typhoons, rainstorms increased, the temperature dropped slightly. In the fall (September to November), typhoons and rainstorms are frequent, and the average monthly temperature drops to 24.2℃. Before and after the cold dew, the weather becomes cooler, sometimes three or five days of cold weather, commonly known as "cold dew wind". The average monthly temperature in the fall is similar to that of spring, but the difference is that in the fall, the temperature shifts from hot and rainy to cold and less rainy, while in the spring, it is the opposite.
The high temperatures and rainfall throughout the year create good growing conditions for crops. However, the unfavorable factor is that the uneven distribution of rainfall, prone to drought and flooding; coupled with wind damage (Qingming wind, dry and hot winds, typhoons, cold dew winds), cold damage (low-temperature cloudy rain) and other disasters, to the crops to a certain extent.
Geology of Qionghai
Geology
Qionghai is located in the eastern part of the Indo-Chinese Rise in Hainan, in the east-west tectonic belt of Changjiang - Qionghai and Qionghai northward rupture belt in the southeast of Qionghai intersect each other parts. The main folds and fractures are:
Gaoming - Jiuqujiang dorsal: distributed in Gaoming to Jiuqujiang, stratigraphy for the Ordovician - Silurian composition. It is a long strip, the axis of the backslope is 60°～70°, and the dip angle of the two flanks is about 60°. It is characterized by tight linear folds.
Shangcun - ringing ditch oblique: distributed in the Shangcun to ringing ditch area, composed of Carboniferous a Permian, axis 45 °, the south east wing dip angle of 48 °, the north west wing of 50 °, is a linear fold.
Wanling - Shanxinling Syncline: distributed in Wanling to Shanxinling, composed of Lower Cretaceous strata, with an axis of 55°, dip angle of 10°-20° on both flanks, and is an open fold.
Changjiang to the county east-west tectonic belt: across the central part of the county. Mainly manifested in the Yangjiang Basin and the granite bodies in the belt as well as the remaining metamorphic blocks, distributed in an east-west direction, and the aeromagnetic anomaly zone in the belt also shows an east-west spread.
Qiongdongnan northward fault zone: the eastern part of the county. The main performance of the Yanshan period from the north and south of the ` granodiorite amphibolite, two long granite and granodiorite porphyry and other rock bodies in the north-south direction, north of the town of Jiaji Quaternary basalt was extended north-south, Dalu, Tayang, Nanshai and other places in the Wanquan River tributaries of the north-south flow direction and the gravity of the two sides of the fracture zone shows the high belt.
Longma - Longjiang Fracture: extends through the Xizai, Longjiang to Wuyuan and other places, the length is greater than 60 kilometers. The strike is 40° in the north-east section and 65°-85° in the south-west section. The fracture cuts the Lower Cretaceous, develops the tectonic breccia belt, and controls the southeast boundary line of the Quaternary basalt being.
Geomorphology
Qionghai is backed by mountains and facing the sea, and the remaining veins of the Mother Ruishan Mountains extend into it from west to east, which constitutes the whole territory's topography tilted from west to east. West and southwest for the mountains, semi-mountainous areas, an area of 347.06 square kilometers, accounting for 20.5%; central and northern tableland, hills, an area of 714.44 square kilometers, accounting for 42.2%; southeast for the plains, 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 of 1264.4 meters. Wanquan River flows from west to east through 10 townships and then injects into the South China Sea.
The middle and low mountain peeling landforms are distributed in the southwest boundary of the county at the top of Dalaoling, Baimaling to Tuanling leaning against the upper part of the peaks and Leigongling and other places. Elevation 500 ~ 1064 meters, relative height difference 450 ~ 760 meters. The bedrock is Ordovician - Silurian shallow metamorphic rocks and Hualixi - Indo-Chinese mixed granite, Yanshan early two-length granite. The top of the mountain is dome-shaped, and the slope is concave, with the development of "V"-shaped gullies. The area is 32,400 mu, accounting for 1.27% of the total area.
The denuded undulating plain is widely distributed in Yangjiang, Zhongyuan, Hot Spring and other areas south of the Wanquan River, with the terrain slightly tilted to the east, and to the north of Luo Nan, Dongsheng Farm, Wanquan, Jiajia Town and other areas and Yantang, Changpo, Tayang, Chaoyang and other areas tilted to the south and southeast, respectively. The altitude is 10-100 meters, and the relative height difference is 5-59 meters. The bedrock is mainly Ordovician - Silurian, Lower Cretaceous, Lingwen Formation, Carboniferous I Permian, as well as Hualixi - Indo-Chinese mixed granite, Yanshan early granite. River bends develop on the plains, and there are more residual hills standing on the ground. The area of 665,800 acres, accounting for 26.2%.
The marine landforms are distributed in the coastal section east of the line from Wenyuan to Gayu, Hot Spring and Jiuqujiang. Elevation 0 ~ 30 meters. Strata for the Quaternary loose marine deposits, largely parallel to the coastline or coastal zone distribution, slightly tilted to the sea direction. The area of 259,300 acres, accounting for 10.2%, of which 229,400 acres of shallow marine sediments, accounting for 9.0%.
The river erosion accumulation landforms are distributed along both sides of the river and the mouth of Wanquan River. The elevation is 0.5-20 meters. Stratigraphy includes river terrace and estuary delta quaternary loose sediments. The width of the terrace is 400～4600 meters, and the surface of the terrace is slightly inclined to the riverbed. The area is 243,300 acres or 9.6%.
Scenic spots in Qionghai
Red Nyonya Memorial Park
The Red Nyonya Memorial Park is to commemorate the birth of the "Women's Army Special Company of the Second Independent Division of the Chinese Workers' and Peasants' Red Army" during the Second Domestic Revolutionary War.
The Red Detachment of Women is a large-scale cultural and tourist attraction specially built to commemorate the birth of the "Women's Army Special Service Company of the Second Independent Division of the Chinese Workers' and Peasants' Red Army" during the Second Domestic Revolution.
The Red Nymphets Memorial Park is located at the entrance of Guantang, Qionghai on the East Highway, 93 kilometers from Meilan Airport in Haikou and 160 kilometers from Phoenix Airport in Sanya. The park covers an area of 200 acres, is the integration of tropical style garden, large-scale thematic sculptures, reliefs and wonderful song and dance performances as one of the large-scale cultural and tourism attractions. Memorial Park is mainly composed of four major functional areas, namely, the front view of the park, the theme sculpture pavilion area, the tropical style garden scenic area, and the tourism service area, and the park is equipped with attractions such as the Peace Square, the Memorial Square, the Company of the Nyonya Scouts, the Song and Dance Square, the Coconut Grove Walled City, the former residence of Nan Batian (the South Mansion), and the Memorial Hall.
Memorial Park opened in May 2000, in 2001 by the Central Propaganda Department as "National Patriotism Education Demonstration Base", in July 2004 by the Central Propaganda Department, the Ministry of Civil Affairs, the Ministry of Culture and so on as "National Patriotism Education Demonstration Base Advanced Unit
Jade Belt Beach
Jade Belt Beach is a naturally occurring terrain narrow beach peninsula, located in Boao, Hainan, the outer South China Sea smoky and endless, the inner Wanquan River. Yudai Beach is 8.5 kilometers long, the terrain resembles the Gold Coast of Australia and Cancun, Mexico.
Boao Forum for Asia (BFA) Site
Boao is the location of the permanent site of Forum for Asia (FFA), a famous international conference organization. The area has convenient transportation, developed communication and increasingly complete infrastructure
Boao has 7 star hotels such as Sofitel and Gold Coast Hot Spring Hotel, and 2 development zones. The development zones are Boao Coastal Tourism Development Zone and Boao Water City International Convention and Exhibition Leisure Resort. The permanent venue of "Forum for Asia" is located in the center of Boao Water City International Convention and Exhibition Resort. The scenic spot has been awarded as "Top Ten Tourism Zones in Hainan Province", "Excellent Foreign Tourism Visiting Spot in Hainan Province" and "Civilized Scenic Tourism Demonstration Spot in Hainan". East of the "Jade Belt Beach" was included in the Guinness World's Most; in the mountains, the embrace of the countryside, there is a perfect ecological protection of the water surface of the Shamei Inland Sea; Wanquan River, Longlou River, Jiuqujiang River convergence of the three rivers; East Island, Shapo Island, Yuanyang Island, the three islands are looking at each other; Jinniu Ridge, Tianchong Ridge, Longtan Ridge, three Ridge embracing.
Wanquan River
Wanquan River used to be called Baiquan River. It is a river in the southeast of Hainan Island, China. There are two sources: the southern branch of the Lehui water as the main stream, 109 kilometers long, originated in Wuzhishan Linbei village south ridge. The northern branch of Ding'an water, originating from the south of Limu Ling. The two waters in Qionghai City, Hekou mouth will be called Wanquan River, through the Jiaji to Boao into the South China Sea. The total length is 163 kilometers, with a watershed area of 3,683 square kilometers. The upper reaches of the river are characterized by high mountains and steep ridges, and it flows through deep valleys. After passing through the mouth of the Hecou, the river channel widens and the water flows gently. The total drop of the river is 523 meters, with a capacity of 263,000 kilowatts. The mouth of the river is in the shape of a gourd, with a pincer-like harbor and a width of about 100 meters. The navigable channel is about 73 kilometers. Wanquan River is the third largest river in Hainan Island, originating from Wuzhi Mountain. Wanquan River is an unpolluted, ecologically beautiful tropical river in China, known as China's "Amazon River". The upstream banks of Wanquan River are characterized by undulating mountains, towering peaks, towering trees, and magnificent scenery. There is a mangy tropical natural forest reserve, there are Qiongqiao Mr. He Linshu in 1906 in the former Lehui County Chongwen Township Hewan founded the "Qiongan Rubber Plantation" and Qiongya Longjiang Revolutionary Site, Shi Hu Mountain cliffs carvings, and other natural history and humanities landscapes.
Baishiling
Baishiling is located 12 kilometers southwest of Qionghai City, with a total area of about 16.24 square kilometers, consisting of Denggao Ling and other mountains. Denggaoling is the highest peak of Baishi Ling, with an elevation of 328 meters. The ridge has 1308 steps up the cliffs and up, climbed to see the "Whitehead Ridge eight scenes", a full view of the Wanquan River landscape.
White Stone Ridge Eight Scenes are: Stone Pillar, Golden Bell Driving Chase, Green Lion Overlook, Cui Ping embracing the moon, Kongdong sieve wind, Cang Niu Spray, granite azure color, Bishu storage clouds. From the "Kongdong Sifting Wind" up 300 steps, the best view of Baishi Ling is the "Stone Pillar in the Sky". In the Qing Dynasty, the local scholar Wang Chongyou said in a poem: "Towering mountains stand in the wilderness, a colorful light whisking purple Heng.