Sanjiang Dong Autonomous County, Liuzhou City, Guangxi Zhuang Autonomous Region

Sanjiang Dong Autonomous County, subordinate to Liuzhou city of Guangxi Zhuang Autonomous Region, is located in the north of Guangxi Zhuang Autonomous Region. It is located in 108 ° 53 ′～ 109 ° 52 ′ E and 25 ° 22 ′～ 26 ° 2 ′ n. It is the junction of Hunan, Guangxi and Guizhou. It belongs to subtropical Nanling humid climate zone and mountainous Valley climate zone.

Sanjiang Dong Autonomous County covers a total area of 2454 square kilometers, connecting Longsheng Autonomous County and Rong'an County in the East, Rongshui county and Congjiang County in Guizhou Province in the west, Tongdao County in Hunan Province and Liping County in Guizhou Province in the north, and Rong'an county and Rongshui County in the south. Guyi town is 203 km away from Liuzhou city and 167 km away from Guilin city.

In 2013, Sanjiang Dong Autonomous County achieved a GDP of 3.726 billion yuan, an increase of 8.1% compared with 2012. By the beginning of 2014, the total population of Sanjiang Dong Autonomous Region was 367707 (2010), including Dong, Han, Miao, Yao, Zhuang and other nationalities. In 2017, it has jurisdiction over 6 towns and 9 townships.

Famous scenic spots in Sanjiang Dong Autonomous County include Shimenchong natural ecological scenic spot, Chengyang bazhai scenic spot, Danzhou scenic spot, etc.

On November 14, 2019, Sanjiang Dong Autonomous County was awarded the third batch of national ecological civilization construction demonstration counties by the Ministry of ecological environment. China's top 100 water purification counties and cities in 2020. On November 20, 2020, the people's Government of Guangxi Zhuang Autonomous Region approved to withdraw from the poverty-stricken counties.

Evolution of organizational system

Sanjiang County was founded in 1105, the fourth year of Chongning in Song Dynasty. Huaiyuan army was set up in sankou village of Rongshui County, then Pingzhou and Huaiyuan County.

Ming Hongwu 13 years (1380) restoration in the old fort.

In 1591, the county government moved to Danzhou.

In 1914, it was renamed Sanjiang County.

In 1932, he moved to Guyi.

Sanjiang County was liberated on November 18, 1949, and the county people's government was established on December 18.

The Dong Autonomous Region at the county level was established on December 3, 1952.

It was changed into Dong Autonomous County in September 1955.

In 1996, Sanjiang Dong Autonomous County covered an area of 2441 square kilometers with a population of 325000. It has jurisdiction over 3 towns and 13 townships (including 3 ethnic townships): Guyi Town, Danzhou Town, Doujiang Town, Linxi Township, Zhouping Township, Gaoji Yao Township, Heping Township, Laobao Township, Chengcun Township, Meilin Township, Fulu Miao Township, Yangxi Township, Liangkou Township, Tongle Miao Township, Dutong Township and Bajiang township. The county government is located in Guyi town.

According to the fifth census in 2000, the total population of Sanjiang Dong Autonomous County is 304149, including 21565 in Guyi Town, 15764 in Danzhou Town, 18890 in Doujiang Town, 19066 in Zhouping Township, 7096 in Chengcun Township, 6738 in Heping Township, 15243 in Laobao Township, 6727 in Gaoji Yao Township, 24008 in Liangkou Township, 15932 in Yangxi Township, 21475 in Fulu Miao Township, 9820 in Meilin Township and 27640 in Bajiang township There are 22019 people in Linxi Township, 36986 people in Dudong Township and 35180 people in Tongle Miao township.

On September 29, 2002, the State Council approved (Guo Han No. 88): Luzhai County, Rong'an County, Rongshui Miao Autonomous County and Sanjiang Dong Autonomous County in the former Liuzhou area were under the jurisdiction of Liuzhou city.

On June 13, 2005, the government of Guangxi Zhuang Autonomous Region (GZH No. 165) agreed to abolish Zhouping Township, merge the whole system into Guyi Town, and keep the location of Guyi town government unchanged. After the adjustment, the county governs 3 towns and 12 townships (including 3 ethnic townships): Guyi Town, Doujiang Town, Danzhou Town, Dudong Township, Bajiang Township, Linxi Township, Tongle Miao Township, Meilin Township, Fulu Miao Township, Yangxi Township, Liangkou Township, Laobao Township, Gaoji Yao Township, Heping Township and Chengcun township.

On November 20, 2020, the people's Government of Guangxi Zhuang Autonomous Region approved to withdraw from the poverty-stricken counties.

geographical environment

geographical position

Sanjiang Dong Autonomous County is located in the north of Guangxi Zhuang Autonomous Region, 108 ° 53 ′～ 109 ° 52 ′ E and 25 ° 22 ′～ 26 ° 2 ′ n. It is the junction of Hunan, Guangxi and Guizhou provinces.

Geology and geomorphology

Sedimentary rocks are widely distributed in Sanjiang Dong Autonomous County. Danzhou group and Sinian system account for more than 95% of the area of Sanjiang Dong Autonomous County. The Mesozoic Cretaceous system is dotted in Chengyang in the north. There are a small amount of Xuefeng volcanic eruptive rocks at the junction of the East and Longsheng, some ultrabasic rocks near the estuary, and a small amount of basic rocks, diorite and lamprophyre exposed in the middle and south Located in the southern margin of Jiangnan ancient land, it is between Jiuwan mountain dome fold belt and Longmai fold fault belt. There have been many crustal movements, and fold faults are very well developed.

The landforms of Sanjiang Dong Autonomous County are divided into six levels of first-class landforms: residual mountain, steep cliff narrow ridge mountain, V-shaped Valley, river valley from hill to river, residual Piedmont terrace.

climate

Sanjiang Dong Autonomous County is located in the low latitude area, which belongs to the humid climate zone of middle subtropical and Nanling. The annual average temperature is between 17 ℃ and 19 ℃, and the temperature difference between the north and the south is 1 ℃ to 2 ℃. It has the same season of rain and heat, distinct cold and heat, foggy morning and dusk, and is suitable for farming in four seasons. It has many cold waves and cloudy rain in spring, heavy rain and high temperature in summer, drought in autumn and frost in winter.

Spring is from mid March to mid May, summer is from mid May to late September, autumn is from late September to the end of November, and winter is from early December to next March. January is the coldest with an average of 7.1 ℃, and July is the hottest with an average of 27.4 ℃.

The average annual rainfall in Sanjiang Dong Autonomous County is 1493mm; the rainfall distribution in Sanjiang Dong Autonomous County is more in the south, less in the north, more in the East and less in the West; summer is the peak season of rainfall, accounting for 42-48% of the whole year; spring is the second peak season of rainfall, accounting for 30-35% of the whole year; autumn and winter are less.

Sanjiang County belongs to the area with less sunshine, with an average annual sunshine of 1333.3 hours; Sanjiang County belongs to the monsoon climate area, with the annual wind direction of north-east wind, followed by north wind and northeast wind; the annual average fog days are 79 days; the annual average frost free period is 321 days; the annual average snowstorm is 5 days; the annual average icing is 7.2 days; and the annual average relative humidity is 81%.

hydrology

In Sanjiang Dong Autonomous County, there are 74 rivers, big and small, crisscross. The name "Sanjiang" comes from the three big rivers in the county, namely Rongjiang, Xunjiang and miaojiang.

Sanjiang Dong Autonomous County is a part of Xijiang River System in the upper reaches of the Pearl River. There are 74 rivers in Sanjiang Dong Autonomous County, with a total length of 68km. Among them, there are 16 major rivers. There are 8 rivers with rainfall collection area of 50km ~ 2 to 100km ~ 2, 8 rivers with rainfall collection area of 100km ~ 2 and 3 main rivers. Rongjiang river is 91km long, with annual runoff of 10.25 billion cubic meters, and its tributaries are miaojiang River, Dadi River and shaijiang river Xiaobin River, Gaolu River, Danian River, Baluo River and Xijiang River. Xunjiang is 63km long in the county with an annual runoff of 580 million cubic meters. Its tributaries are Doujiang River, Linxi River, Yangkou River, Bajiang River, salihe River and Yancha river. Rongjiang is 91km long with an annual runoff of 10.25 billion cubic meters. Its tributaries are Xipo River, Banjiang River and tianzhai river. There is no underground river in the county. The groundwater supply comes from atmospheric precipitation, and the supply and consumption are basically balanced. Generally, the spring water is continuous all the year round.

soil

Sanjiang Dong Autonomous County belongs to red soil zone, but it can be divided into red soil zone, yellow red soil zone and yellow soil zone according to the altitude of mountain area; the vertical distribution rule of Sanjiang Dong Autonomous County is that hills below 500 meters are red soil zone soil, hills between 500 meters and 800 meters are yellow red soil zone soil, and hills above 850 meters are yellow soil zone soil. The general characteristics of the soil are: the soil is thick, mostly loam; the content of organic matter is high.

natural resources

mineral resources

In 2012, the discovered minerals in Sanjiang Dong Autonomous County include stone coal, iron, vanadium, manganese, copper, lead, zinc, tungsten, antimony, gold, phosphorus, potassium, diamond, barite, quartzite, diabase, serpentine, mineral water, slate, phyllite, feldspar quartz sandstone, macular rock, etc. Among them, 8 kinds of resources have been identified.

land resource

In 2012, the total land area of Sanjiang Dong Autonomous County was 2454 square kilometers, including 210800 hectares of agricultural land, accounting for 85.9% of the total land area. Among the agricultural land, the cultivated land is 130400 hectares, accounting for 6.2% of the agricultural land; the garden land is 769800 hectares, accounting for 3.63% of the agricultural land; the forest land is 176800 hectares, accounting for 83.87% of the agricultural land; the pasture land is 1327000 hectares, accounting for 6.3% of the agricultural land.

water resource

In 2010, the total amount of water resources in Sanjiang Dong Autonomous County was 2.47 billion cubic meters, and the per capita water resources was 7005 cubic meters. There are differences in the spatial and temporal distribution of precipitation: the precipitation in the southeast is more than that in the northwest. For example, the annual precipitation in Heping and Danzhou in the southeast is more than 2200mm, while that in Linxi, Dudong, Tongle, Yangxi and Fulu in the northwest is only 1400mm. The precipitation in spring and summer is more than that in autumn and winter.

Forest resources

The vertical distribution of forest vegetation in Sanjiang Dong Autonomous County is generally evergreen broad-leaved forest belt below 500 meters above sea level, and Camellia oleifera forest is the main economic forest; Castanopsis fargesii, Quercus spp., Zizyphus jujuba, pseudochiyang, Phoebe, Liquidambar formosana, Betula luminifera, etc. grow at 500-800 meters above sea level; in the mountains above 800 meters above sea level, most of them are water source forest and shrub, and the original vegetation is broad-leaved forest, and the main tree species are beech The top of the mountain is bryophyte short curve forest belt; the mountain is below 1000 meters above sea level. Once the broad-leaved forest is damaged, Pinus massoniana and salt will grow

Chinese PinYin : Guang Xi Zhuang Zu Zi Zhi Qu Liu Zhou Shi San Jiang Dong Zu Zi Zhi Xian