Where is the source of Xijiang River?

Question 1: Where is the source of the Pearl River? The Pearl River is the third largest river in China after the Yangtze River and the Yellow River. It originally refers to the reach from Guangzhou to Dongjiangkou, and later it is called water system. At present, the so-called Pearl River Basin includes the vast basins of Xijiang River, Beijiang River, Dongjiang River and Pearl River Delta. The Pearl River Basin spans Yunnan, Guizhou, Guangdong, Guangxi, Jiangxi and Hunan provinces, and the water systems are fan-shaped and dendritic. The total length of main tributaries is about1.65,438+0,000 km, and the total drainage area is 452,600 km2.

The Pearl River is formed by the confluence of three rivers: the east, the north and the west. Its main stream is called Xijiang River, which originates from Maxiong Mountain in Zhanyi County, Yunnan Province, with a total length of about 22 10 km. The total drop is about 2130m, and the basin area above Sanshui is about 35.5 square kilometers. Nanpanjiang and Beipanjiang in the upper reaches of Xijiang River are called Hongshui River, Liujiang River crossing Dateng Gorge is called Qianjiang, Qianjiang River meeting Yujiang River is called Jiang Xun, and Xijiang River meeting Gui Jiang is called Xijiang River. After flowing through the Antelope Gorge, the Xijiang River joins the Beijiang River in Sixian County, then flows through the Pearl River Delta and flows into the South China Sea. The main source of Beijiang River is Mianshui, which originated in Xixiwan, Xinfeng County, Jiangxi Province. The main stream is 468 kilometers long and the basin area is about 46,000 square kilometers. Most of them are in Guangdong province, with a total drop of about 3 10 meter. The main tributaries are Wushui, Lianjiang and Suijiang. Beijiang River flows into the delta river network area after crossing Sanshui from the middle reaches, and flows into the South China Sea after intersecting with Xijiang River. Dongjiang originated in Dazhuling, Xunwu County, Jiangxi Province, also known as "Xunwu Water". After meeting Dingnan Water, it is called Dongjiang River. It flows through eastern Guangdong, with a total length of 523 kilometers and a drainage area of 28,000 square kilometers, with a total drop of about 440 meters. After reaching Shilong, it diverted to form Dongjiang Delta. After that, it is divided into two large rivers, the north main stream and the south tributary, which are injected into the lion ocean and go out to sea through Humen. The main tributaries are Anyuan Water, Xinfengjiang, Hong Kong, Xizhijiang and Zengjiang.

The average annual runoff of the Pearl River Basin is 34 12 billion cubic meters, ranking second in the country. The average annual runoff of Xijiang River is about 267 billion cubic meters, accounting for 80% of the whole basin, Beijiang River is 47.2 billion cubic meters and Dongjiang River is 27.2 billion cubic meters. The Pearl River Basin is in flood season from April to September every year, and its flow accounts for 70-80% of the whole year. Floods often occur in summer, and there are often big autumn floods in the downstream and delta areas. The annual average sediment concentration in the basin is 0. 1.26 ~ 0.344 kg/m3.

The Pearl River hydraulic resources are highly concentrated, which is beneficial to system development. The hydropower reserves in the Pearl River Basin reach 33.35 million kilowatts, and the annual power generation can reach 292 1 100 million kwh, accounting for 5.8% of the whole country. Most of the hydropower resources in the basin are located in Xijiang River, with hydropower reserves of 29.43 million kilowatts, accounting for 88% of the whole basin, and exploitable capacity of 2 1 1.7 million kilowatts, accounting for 86% of the whole basin. Other rivers and deltas have water energy reserves of only 12%, and the exploitable amount is 14%.

There are about 250 species of freshwater fish in the Pearl River Basin, including carp, crucian carp, bream, green grass, silver carp, bighead carp and mandarin fish, as well as the endemic shad, flower eel and curly-billed fish. There are also rich clams, blue crabs, sand shrimps and cultured oysters in the lower reaches of the Pearl River Delta, which is a developed area of freshwater aquaculture in China.

Meteorological hydrology

The Pearl River Basin is located in the subtropical zone, and the Tropic of Cancer runs through the middle of the basin, with a mild and rainy climate. The annual average temperature is between 14 ~ 22℃, and the annual average rainfall is 1200 ~ 2200mm. The rainfall distribution obviously decreases gradually from east to west, and the rainfall distribution is uneven during the year, with great regional differences and great interannual changes.

The average annual runoff of the Pearl River is 336 billion cubic meters, including 238 billion cubic meters in Xijiang, 39.4 billion cubic meters in Beijiang, 23.8 billion cubic meters in Dongjiang and 34.8 billion cubic meters in Delta. The distribution of annual runoff is extremely uneven. The flood season from April to September accounts for about 80% of the total annual runoff, and it accounts for more than 50% in June, July and August. The Pearl River is rich in water resources, with a per capita water resource of 4,700 cubic meters, which is equivalent to 1.7 times of the national average. However, the interannual change and uneven spatial and temporal distribution lead to frequent natural disasters such as floods, droughts, salinization and so on.

The flood in the Pearl River basin has the characteristics of high peak, large volume and long duration. The main weather systems that cause flood in the basin are peak or static peak and southwest trough, followed by tropical depression and typhoon. Rainstorms and floods often occur in June, July and August every year.

The dry season in the Pearl River Basin is generally from June 5438+00 to March of the following year, and the average annual runoff in dry season is 80.3 billion cubic meters, accounting for only about 24% of the annual runoff in the whole basin. The minimum flow rate of Wuzhou Station in Xijiang River in dry season is 720 cubic meters per second, Beijiang Cornerstone 130 cubic meters per second, and Boluo Station in Dongjiang River is 3 1.4 cubic meters per second. ...& gt& gt

Question 2: Where are the sources of Xijiang, Dongjiang and Beijiang rivers? Xijiang River originates from Maxiong Mountain in Qujing City, Yunnan Province, and flows into the South China Sea at Modaomen Enterprise Stone in Zhuhai City, Guangdong Province, with a total length of 22 14km.

The source of Dongjiang River is located in Santong Village, Sanbiao Township, Xunwu County, Jiangxi Province, at the junction of Xunwu County, Huichang County and Anyuan County, which is the watershed of Dongjiang River system.

Beijiang River originates from Damaoyuan, Xinfeng County, Jiangxi Province, with Sixian Angle of 468KM long and drainage area of 467 10 square kilometers, accounting for 10.3% of the Pearl River drainage area.

Question 3: Where is the source of the Pearl River? The Pearl River Basin is a complex basin, which consists of four river systems: Xijiang River, Beijiang River, Dongjiang River and Pearl River Delta River. The west and north rivers flow into the Pearl River Delta at Sixianjiao, Sanshui City, Guangdong Province, and the Dongjiang River flows into the Pearl River Delta at Shilong Town, Dongguan City, Guangdong Province, and flows into the South China Sea through eight gates, including Humen, Jiaomen, Hongqi Gate, Hengmen, Modaomen, Jiti Gate, Hutiaomen and Yamen.

The main stream of Xijiang River originates from Maxiong Mountain in Qujing City, Yunnan Province, and flows into the South China Sea at Modaomen in Zhuhai City, Guangdong Province, with a total length of 22 14km. Xijiang River is composed of Nanpanjiang River, Hongshui River, Qianjiang River, Jiang Xun and Xijiang River, and its main tributaries are Beipanjiang River, Liujiang River, Yujiang River, Gui Jiang River and Hejiang River. The river above Sixianjiao is 2075KM long, with a drainage area of 353 120 square kilometers, accounting for 77.8% of the Pearl River drainage area.

Beijiang River originated in Damaoyuan, Xinfeng County, Jiangxi Province. The river above Sixianjiao is 468KM long, with a drainage area of 467 10 km2, accounting for 10.3% of the Pearl River drainage area. The main tributaries are Wushui, Wan, Lianjiang and Suijiang.

Dongjiang River originated in Ji Ya, Xunwu County, Jiangxi Province. The river above Shilong is 520KM long, with a basin area of 27,040 square kilometers, accounting for 5.96% of the Pearl River basin area. The main tributaries are Xinfeng River and Xizhijiang River.

Question 4: Where is the source of the Pearl River? The source of the Pearl River should be Ma Xiong Mountain in Zhanyi County, Yunnan Province.

Xijiang, the main stream of the Pearl River, originated in the northeast of Yunnan Province.

Ma Xiongshan is in Zhanyi County, and the main stream flows through Yunnan.

Guizhou, Guangxi and Guangzhou (autonomous regions)

And Hong Kong and Macao Special Administrative Regions. In Guangdong

Sanshui meets Beijiang River and comes from the Pearl River Delta.

Eight estuaries in this area flow into the South China Sea. Beijianghe

The Dongjiang River system is almost entirely in Guangdong; north

Jiangyuan comes from the south of Hunan and Jiangxi provinces, with a total length of 582 kilometers;

The Dongjiang River source originated in the south of Jiangxi Province, with a total length of 503 kilometers.

Question 5: Geographical Location of Xijiang River Basin The main rivers in Xijiang River Basin are Nanpanjiang, Hongshui River, Qian Xun, Yujiang, Liujiang, Gui Jiang and Hejiang. The total area of Xijiang River basin is 304,900 square kilometers, of which the catchment area in Guangxi is 202,400 square kilometers, accounting for 85.7% of the total water area, and the total water resources account for about 85.5% of the total water resources in Guangxi. Nanpanjiang River is the main source of Hongshui River in the Pearl River Basin and the mainstream of Xijiang River. The river is 936 kilometers long, and the basin area in Guangxi is 4 162 square kilometers. The average total water resources for many years is 65.438+94.3 million cubic meters, and the water production modulus is 467,000 cubic meters/square kilometer. Hongshui River. From sugarcane fragrance to leye county, Tiane, Nandan and Laibin counties in Guangxi, to Shilong Town and Liujiang Town in Xiangzhou County? The river is 659 kilometers long and the catchment area of the basin is 43,790 square kilometers. The average total water resources for many years is 32.499 billion cubic meters, and the water yield module of the basin is 746,700 cubic meters/square kilometer.

Question 6: Where is the source of Lijiang River? Lijiang River, the general name of the upper reaches of Gui Jiang, a tributary of Xijiang River (the main stream of the upper reaches of the Pearl River), is located in the northeast of Guangxi Zhuang Autonomous Region. Lijiang River originates in the north of Maoershan, Huajiang Township, Xing 'an, Guangxi Zhuang Autonomous Region, and south of Laoshan boundary, with an altitude of1.732m (yellow sea bottom). Wugui River, the main source of Lijiang River, joins Longtang River in the south and Heikong River in the east. When these three rivers meet, they are called Liu Donghe. It flows south to Simenkou to join the Huangbaijiang River and Chuanjiang River, which is called Darongjiang River, and then joins Linghe River near Rongjiang Town, which is called Lijiang River. Lijiang River flows through lingchuan county and Guilin and joins Gongcheng River in the north of pingle town, Pingle County, with a total length of164km. Pingle town is hereinafter referred to as Gui Jiang. The river continues to flow south to Wuzhou and into Xijiang River.

In xing an, at the mouth of Rongjiang Town, it is connected with the Lingqu of the ancient canal, which is the starting point of Lijiang River (according to ancient hydrology, Lingqu is the upstream source of Lijiang River), and leaves the country after being connected with Xiaorongjiang River.

In lingchuan county, it entered the territory in Xiaorongjiang Village. Lijiang River basin covers an area of 2 173.29 square kilometers. The total length is 45km, which is divided into two sections: the upper section is 33.5km, and the average width of the river surface is160m. Starting from Xiaorongjiang Village, it flows through Xiabei, Yantou, Sanjie, Fuqiudu, Dutou, Shuangtan, Cuijiawei and Sanchawei. It has collected Baiyun River, Lujiang River, Ganjiang River, Waterfall River, Sanyuanhe River and Gan Tang River, and flowed into Guilin from Qin Xia to Dadianwei. The lower section 1 1.5km, the average width of the river surface is 220m, and the river bottom is pebbles mixed with sand and silt. From Shanglijiao Village in Dawei Town to Nancun Village through Ganxing and Dawei Town, it flows southward to Qingshuitan, where it receives the water from the ancient cave and flows out of the suburbs of Guilin and Xiayangshuo County.

In the urban area of Guilin, the Lijiang River enters the urban area of Guilin at Qinjia, lingchuan county, passes through the urban area from north to south, flows to Douji Mountain after meeting in taohuajiang, winds south after passing through Dawei Town, Lingchuan, enters Yangshuo in Yan Guan, Caoping Township, and flows through the urban area for 49.3 kilometers. Guilin Hydrological Station (at the end of Zhangmu Village, Chuanshan Township) covers an area of 2,762 square kilometers, with an average width of 39.2 kilometers and the length of the main stream 105 kilometers. The shape of the basin is a long multi-branch water system with narrow top and wide bottom. Darongjiang to Guilin is a karst peak forest plain with a riverbed gradient of 0.94‰ and an average riverbed gradient of 0.44‰ in urban areas.

In Yangshuo County, it flows into the county from Yan Guan Village, Di Yang Township. Entering the county town, it flows through tributaries such as Di Yang, Xingping, Welfare, Yangshuo Town, Chengguan, Puyi, Nashanbei River, Tuling River, Dayuan River, Zhangguihe River, Shuangyue River, Tianjiahe River and Shuangqiao River. Ma Caoping entered Pingle County in Puyi Township, with a total length of 69 kilometers, accounting for the main stream of Lijiang River (usually called the section from Xing 'an to Pingle as Lijiang River, with a total length of 6544 kilometers).

In Pingle County, the Lijiang River (Lipu River, Lijiang River and Chajiang River) meets in pingle town and is called Gui Jiang, which flows southward into Zhaoping County.