Haikou city characteristics, climate characteristics, residential characteristics, humanistic characteristics, geographical characteristics

Haikou climate characteristics

Located at the northern edge of the low-latitude tropics, it has a tropical ocean climate. Spring is warm with little rain and drought, summer is hot and rainy, autumn has many typhoons and rains, and winter is invaded by cold air currents. There are chills. The sunshine hours are long throughout the year and the radiation energy is large. The average annual sunshine hours are 2225 hours, and the amount of solar radiation can reach 110,000 to 120,000 calories. The annual average temperature is 23.8°C, the highest average temperature is about 28°C, and the lowest average temperature is about 18°C. The frost-free period is 346 days; the annual average precipitation is 1,664 mm, and the average daily rainfall is above 0.1 mm, with more than 150 rainy days; the annual average evaporation is 1,834 mm, the dryness is 1.08 degrees, and the average relative humidity is 85%. Northeasterly and easterly winds prevail all year round, with an average annual wind speed of 3.4 meters/second. In winter, strong cold currents often invade, bringing short-term cold spells; from May to November, tropical cyclones sometimes occur.

Geography Haikou City is located at 19°32′-20°05′ north latitude and 110°10′-110°41′ east longitude. It is located in the northern part of Hainan Island, bordering the Qiongzhou Strait to the north, facing Hai'an Town of Guangdong Province 18 nautical miles away; adjacent to Wenchang City to the east; Wenchang City and Ding'an County to the south; and Chengmai County to the west. Haikou City starts from the old village of Dapo Town in the east and ends at Baonan Village in Xixiu Town in the west. The two ends are 60.6 kilometers apart. It starts from Wuche Village in Dapo Town in the south and ends at the sea in the north. The two ends are 62.5 kilometers apart. The city's land area is 2304.84 square kilometers.

Terrain Haikou City is slightly heart-shaped, with gentle terrain. The longest river in Hainan Island, the Nandu River, passes through the middle of Haikou City. The eastern part of the Nandu River tilts slightly from south to north, and the western part of the Nandu River tilts from north to south; the northwest and southeast are higher, the central part of the Nandu River is low and flat, and the north is mostly a small coastal plain. The city except Ma'an Ridge in Shishan Town (elevation 222.2 meters), Jiuzhou Ridge in Jiuzhou Town (199.9 meters), Rishailing in Jiazi Town (171 meters), and Leihu Ridge in Yongxing Town (168.3 meters above sea level) m) and other 38 higher hills, most of them are platforms and plains below 100 meters above sea level. Ma'anling is the highest point in the city. The surface is mainly composed of Quaternary basic volcanic rocks and Quaternary loose sediments, which are distributed over a large area. The coast is dominated by coastal step landforms, and the west is dominated by typical volcanic landforms. The city's landform is basically divided into the northern coastal plain area, the central riverside terrace area, the eastern and southern platform areas, and the western lava platform area.

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