1. North latitude 19°32′-20°05′, east longitude 110°10′-110°41′. It is located in the northern part of Hainan Island, bordering the Qiongzhou Strait in the north, and 18 nautical miles away from Haian Town, Guangdong Province. Looking
2. Haikou City is slightly heart-shaped and has a 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.
3. The maximum average temperature is about 28 ℃, and the minimum average temperature is about 18 ℃; the extreme temperature is as high as 38.7 ℃ and as low as 4.9 ℃. The annual average precipitation is 1664 mm, and the average daily rainfall is more than 0.1 mm on rainy days. More than 150 days; the average annual evaporation is 1834 mm, and the average relative humidity is 85. Northeasterly and southeasterly winds prevail all year round, with an average annual wind speed of 3.4 meters/second.
4. The vegetation in Haikou City is dominated by shrubs and grasses. The natural vegetation is mainly wild shrub and grass plant populations common in southern tropical areas. The main vegetation includes coastal mangrove communities distributed along the northeastern coast
The main soil types include basalt brick red soil, volcanic ash young brick red soil, sandy shale brick red soil, banded tidal sand mud, and coastal sand soil. There are 8 soil types, 12 subcategories, 43 soil genera, and 110 soil species.
5. The currently proven minerals in Haikou City mainly include coal, diatomite, peat, clay, kaolin, bauxite, mineral water, geothermal water, stone and river sand. The coal mine is lignite, distributed in Changchang Coal Mine in Jiazi Town; the stone is mainly distributed in Yongxing Town, mainly basalt; mineral water and geothermal water are mainly distributed in the northern part of the city and the crater area of ??Yongxing Town; river sand It is mainly distributed in the alluvial sandbanks in the Dongshan Town section of the Nandu River and the lower reaches of Longtang Town
6. This question is hard to explain. I don’t know what you mean. This problem is common all over the world. Hainan is relatively backward, and backward places naturally do not have a strong awareness of environmental protection. However, Haikou's economy has developed rapidly, and a lot of environmental protection and management has been done in recent years. People's awareness of environmental protection has increased. However, Haikou is a tourist city with a large population flow, which will have a considerable impact and burden on the environment.