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Natural Resources

Changsha, endowed with unique natural geography, beautiful scenery mountains and rivers as well as abundant natural resources, is the only selected city for ecology among provincial capital cities of China.

Land Resources
Changsha is located in intermediate place of Central Hunan hilly area and alluvial plain of Dongting Lake as well as Xiang Liu Basin. It is high in the south and low in the north. Hills and mountain streams, red rock and white sand interlace here. Mountain, hill, hill slope and plains are equally available here. There is mostly red land with weak acid and alluvial soil of river, which is fertile and suit for cultivating. Forest and paddy field are mainly applied, among which the forest is 51.65% and cultivation area is 28.38%.
The city covers a jurisdiction area of 11819 square kilometers. Average cultivated area of farmers is 0.87 mu.

Mineral Resources
Changsha owns a great variety of minerals, especially for non-metallic minerals. The founded minerals are iron, manganese, vanadium, bronze, zinc, sulfur, phosphorus, meerschaum, barite, calcareous clay slate and coal etc. totally 50 kinds. There is unique calcareous clay slate, richest meerschaum in China and Yonghe Phosphorite with top production scale in the province etc. Among that there are 10 big-scale mineral deposits, 16 small deposits and over 300 places with mineral resources.

Water Resources
Changsha belongs to Xiangjiang water system and has abundant water resources. Xiangjiang passes through Changsha from south to north about 75 km to join into Dongting Lake. There are 15 tributaries in Changsha, among which the biggest one is Liuyang River, Laodao River, Jinjiang River and Weishui River. Total water resources is 80.8 billion cubic meters, and the water resources per capita is 3600 cubic meters, which is higher than the national water resources per capita-2220 cubic meters.
Natural Environment

Changsha has superior natural environment. General geological features are: complete exposure strata, widespread granite, complicated geological structure and rich mineral resources.

Geology and Geomorphology
All kinds of strata of historical period expose in Changsha. The oldest stratum was formed around 1 billion years ago. About 600 million years ago, Changsha was covered with sea, which is not deep. After that time, the sea withdrew gradually from east to west; Liuyang, Changsha and plenty of Wangcheng rose to the surface of sea to be the northwestern edge of ancient land of China southeast. About 140 million year ago, Changsha rose to be land because of advancing of sea. With the influence of crustal movement and geological structure, a depression basin ¨CChang (Sha) Ping (Jiang) Basin shape was formed with long strip. When the Cenozoic Era started, the whole depression basin rose to be land. Around 3.5 million years ago, the third ice age arrived in the earth, and Liuyang remained glacial landform. General geological characteristics are: the land has big rolls, various geomorphologies, the surface drainage pattern grew. The northeastern part of Changsha is the north part of Mufu ¨Cthe north part of Luoxiao Mountains; the northwestern part of Changsha is the east edge of offshoot of Xuefeng Mountain; the middle part of Changsha is the intermediate place of Changheng Basin and Dongtinghu Plain. The northeastern and northwestern area is circled by mountainous region. Its land is relatively high; the middle part decreases gradually to be flat which is similar with the shape of saddle; Xiangjian crosses its middle area from south to north; the south land has hills and hill slopes; the north land is flat and wide, the land inclines from south to north, just like a funnel with its mouth to the north. In the inner of urban area, there are flat slopes with slight grades that are consisted by various grade lands; Juzhou in Xiangjiang River is 5 kilometers long, which is unique one in China cities. ?

Mountains
In the east of Changsha, there are Lianyun Mountain, Dawei Mountain, Jiuling Mountain with echelon array of northeast trend and southwest trend. The valley stands in parallel. There are over 50 mountains with elevation of over 800 meters mountain peak. The highest mountain peak of Qixingling is 1607.9 meters. In the west of Changsha, there are over 13 mountains with the elevation of over 800 meters mountain peak. The elevation of Zhanhu River of Qiaokou of Wangcheng is 23.5 meters, which is the lowest point in Changsha; the gap between the highest and the lowest points is 1584.4 meters. There are sole mountain peak in the flat area, which brings big difference with the flat lands around.

Rivers
Rivers of Changsha belong to the water of Xiangjiang River. There are 302 rivers with tributary of above 5 kilometers long, among which 289 are of Xiangjiang River. According to the grade of tributary, there are 24 first grade tributaries, 128 second grade tributaries, 118 third grade tributaries and 32 fourth grade tributaries; another 13 belongs to the water of Zijiang River; those form a complete water system, and the rive spreads in the city. The annual average surface runoff is 8.265 billion cubic meters; the surface runoff depth is 550-850mm. The annual average runoff of water of Xiangjiang River crossing Changsha is 69.250 billion cubic meters, and is navigable all the year. The hydropower reserves of the whole city is 245300 kw; the groundwater reserves is 935 million cubic meters per year, which supply abundant water resources to Changsha, but only 16.72% is applied. Hydrological features of Changsha: complete water system, dense river network; abundant water and rich hydropower resources; with no freezing in the winter and a little sediment concentration.

Soil
Changsha has various soil, which can be divided into 9 soil types, 21 subclasses, 85 soil genus and 221 soil species with total area of 1366.2 mu, among which, the red soil and paddy soil are the main part, which occupy 70% and 25%of total soil area respectively. There are also vegetable garden soil, moisture soil, yellow soil, yellow brown soil, meadow soil, calcareous soil and purple soil, etc, which are suitable for growth of various crops.

Climate Overview
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Changsha has a moist subtropical monsoon climate. Characteristics of climate are: mild, abundant rainfall, rain and heat are in a period, four distinct seasons. Annual average temperature of Changsha urban area is 17.2¡æ, and town is 16.8¡æ¡ª17.3¡æ. Annual accumulated temperature of the urban area is 5457¡æ. Annual average rainfall in urban area is 1361.6mm. Annual average rainfall of each town is 1358.6-1552.5mm. Changsha has long winters and summers, short springs and autumns. There are around 118-127 days in summer, 117-122 days in winter, 61-64 days in spring and 59-69 days autumn. Temperature changes rapidly in spring. There is plenty rainfall in the beginning of summer; autumn is hot and long; winter is extremely cold. Cold and warm air exchange continuously from late March to middle May, which forms rainy days and little sunshine. Temperature increases obviously from the late May. There are 85 days with daily average temperature of over 30¡æ in summer, and there are 30 days with annual temperature of over 35¡æ. It is hot and of little rain in summer. From late September, it becomes warm in daytime and cold at night; rainfall reduces; low cloud amount increase. Winter is from late November to the next middle March. Cold period with the temperature of under 0¡æ is very short in Changsha. January is the coldest month, with monthly average temperature of 4.4¡æ¡ª5.1¡æ. Winter crops can survive safely through winter and grow slowly.

More climate information please visits Changsha Weather Bureau: http://www.csqx.com/

 
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