The hydrological characteristics of the Yalu River and the water vapor characteristics of the Yalu R

Yalu river. The difference between the top and bottom is large, and the difference between the source and the estuary reaches 2440 meters. The annual precipitation of the Yalu River is about 870 mm, and the summer flood enters in mid-June of the year, and August is the maximum monthly flow period of the year, and the summer water volume is about 60% of the annual water volume, and the average annual flow is 926 cubic meters per second.

In autumn, the amount of water decreases, and in October it enters the dry season. The tributaries in China include Hunjiang River, Ai River, Badaogou River, Sandaogou River, Hongtuya River, Daluoquangou River, Ha Ni River, Lalang River, Weisha River, Xiaoxinkai River, Fuer River, Daya River, Banqi River, Cao River and Liulin River. In the territory of North Korea, there are the Xucheon River, the Jangjin River, the Ciseong River, the Dullu River, and the Chungmangang River.

The Yalu River basin is mostly mountainous, the upper reaches are almost all in the canyons, the river channel ratio is larger, and the precipitation and runoff in the middle reaches are the most areas in northern China, with abundant water and no dry water in the rivers. The main stream and tributaries of the Yalu River have built a series of reservoirs, which have greatly changed the water system of the Yalu River.

Originating at 2,700 metres (9,000 ft) above sea level on the summit of Mount Paektu on the China-North Korea border, the Yalu River winds south to Huisan in North Korea, then turns northwest for 130 km (80 mi) to Linjiang in Jilin Province, and then spills 320 km (200 mi) southwest into the Korean Bay.

Except for a small area of basalt along the eastern end of the river, the entire riverbed is composed of Precambrian rocks, and the alluvium at the mouth of the river begins to expand outward. Most of the valleys through which the river flows are deep and resemble canyons; The mountains on both sides are stacked on top of each other, and the elevation is 600 6 51,200 meters (1,900 6 53,800 feet); The main tributaries are the Xuchuan River, the Changjin River and the Balu River.

The section of the river above the river is turbulent and full of waterfalls and reefs. In the middle section from Linjiang to Chushan, there is a large amount of alluvial soil silt in the riverbed, and the water is shallow in winter, and in some places even rafts down the river cannot pass. The downstream water flows slowly, and the silted alluvial soil becomes more and more abundant, forming a huge delta with many islands.

In recent decades, the siltation of the river has become more and more serious, and in 1910 a 1,000-ton steamer could easily travel up the river to Sinuiju, but now a 500-ton ship is difficult to do.

The climate along the river is typically continental, with cold winters and warm summers. During the winter months, the river freezes for four months (November to February) and is not navigable. Because it is located in the middle of the mountains and not far from the ocean, it has abundant rainfall; The rainfall was concentrated in 6 6 59 months, and the abundant rain allowed the conifers and deciduous trees to grow luxuriantly.

Forests provide a safe habitat for wildlife, including wild boars, wolves, tigers, leopards, bears and foxes, birds such as ptarmigans and pheasants, and carp and eels in rivers.

There are many tributaries, wide basins, large flows, fast flow speeds, and some can't remember.

The Yalu River originates from the southern foot of Changbai Mountain in Jilin Province, and its upstream was formerly known as Jianchuangou, and its flow direction first goes south at the source stage, turns northwest after passing through Changbai Korean Autonomous County, and then turns southwest through Linjiang City.

The Yalu River has a large drop in the channel, and the average slope drop is between 1000-1500 meters above sea level in the source section of the river, and the average slope of the river channel is up to 1000-1500 meters. From Changbai to Linjiang section, the high mountains on both sides of the bank are continuous, the river valley is cut deeply, the river channel is bent, and it is difficult to sail. The mountain level on both sides of the river is gradually reduced, the slope of the river channel becomes slow, to the confluence of the Hunjiang River, the average slope of the river channel is, the river potential below the Shuifeng Power Station is gradually widened, entering the middle and lower reaches, the water flow is bifurcated, the sandbar is spreading, and the river section of the river enters the people's sense of tide at the Mashi platform of Jiulian City.

The mouth gate that descends to the estuary is listed as a tidal area. The section from Shuifeng Power Station to Aihekou is 59 kilometers long, the river surface is 400-500 meters wide, the average slope is 1, the section from the estuary to Langtou is 28 kilometers long, the river surface is about 500-1000 meters wide, and the average slope is .

Hydro resources. The Yalu River flows through the Changbai Mountains, with steep and narrow valleys, large specific drops, and hydropower resources of 2.3 million kilowatts. The main tributaries have many good dam sites.

Its tributary, the Aihe River, has a hydropower reserve of 250,000 kilowatts. As of 2006, 9 power stations have been built on the Aihe River, with a capacity of 9,368 kilowatts and an annual power generation capacity of 34.71 million kWh. Shuifeng Power Station is the first large-scale power station jointly operated by China and North Korea, in addition to Yunfeng, Huanren, Huilongshan, Taipingjiao and other large and medium-sized comprehensive water conservancy projects such as power generation, combined with flood control, irrigation and shipping.

Climatic conditions. The Yalu River is a humid temperate monsoon with cold winters and warm summers. The natural conditions in the upper and middle reaches vary greatly:

The average temperature in July is 18 22 in the upper reaches and 18 22 in the middle reaches; The average temperature in January is -17 -22 in the upper reaches and -22 in the midstream. From early December to mid-April every year, the river is frozen and cannot be navigated. Because the Yalu River is located in the middle of the mountains and not far from the ocean, there is abundant rainfall along the way, and the annual precipitation in the middle and lower reaches can reach more than 1100 mm, mainly concentrated in June and September.

It will be a hydrological characteristic. The contents of the analysis of the hydrological characteristics of the river mainly include: water level, flow rate, sediment content, ice period, flood season, water energy abundance, flood flow, runoff change, and flow velocity.

Yalu river. It is named because of the color of the river. The Yalu River basin is densely forested, the mountains on both sides are steep, and the river water is clear and turquoise, especially under the sunlight, the green is translucent and intoxicating.

The ancestors vividly compared the bright green on the neck feathers of male ducks, so they called this river the Yalu River.

Nu River. It is a famous international river in southwest China, originating in the Tanggula Mountains of the Qinghai-Tibet Plateau, flowing into Myanmar from Yunnan and finally flowing into the Indian Ocean. Is the Nu River the "River of Wrath"?

No. It is generally believed that the name of "Nu River" was first ** in the Nu ethnic minority living in Yunnan. In the Nu language, the Nu River is called "Ah Nu Enmei", which means "the river of angry people".

Yongding River. It is the mother river of Beijing, and the Lugou Bridge on the Yongding River has become a permanent historical memory of the Chinese nation due to the "Lugou Bridge Incident" in 1937. How did the "Yongding River" get its name?

In the past, Yongding River was a river with continuous floods, and floods occurred almost every year, causing huge losses to the lives and property of the people on both sides, so it was originally called "Wuding River". In the 37th year of the reign of Kangxi of the Qing Dynasty (1698), the Qing court built a long embankment along both sides of the river below the Lugou Bridge to prevent floods, and the Kangxi Emperor also ordered the river to be renamed "Yongding River", hoping that it could be "stable forever". Although the river flooded later, the name of "Yongding River" has been handed down.

The main tributaries of the Yalu River in North Korea include the Xuchuan River, the Changjin River, the Cicheng River, the Dullu River and the Chungman River. In China, there are Hunjiang River, Pushi River and Yu River.

The Hunjiang River, also known as the mixed river, is located in the southeast of Jilin Province and the northeast of Liaoning Province, and is a tributary of the Yalu River, a river that flows into the Yellow Sea. It is the junction river of Kuandian County, Dandong City, Liaoning Province and Huanren County, Benxi City. The Hunjiang River originates from the Har Yafan Mountain in the north of Baishan City, Jilin Province, flows from Hengren County through four townships including Qingshangou and Taipingwan in Kuandian County, and brings together the Nancha River, Zhengcha River, Sun Cha River, Licha River, Hongtuya River, Banshi River, Heigou River, Hanlianggou River and other tributaries along the way, and finally flows into the Yalu River at the mouth of the Hunjiang River of Xialu River.

With a total length of 445 kilometers and a basin area of 15,044 square kilometers, the Hunjiang River is the largest tributary of the Yalu River system.

Located in the middle of Dandong City, Liaoning Province, the Aihe River is one of the larger tributaries of the Yalu River system. The Aihe River originates from Muduoziling, Shuangshanzi Town, Kuandian, flows through Kuandian County, Fengcheng City and Zhen'an District of Dandong City, and joins the Yalu River in Jiulian City. The total length of the river is 189 kilometers, the basin area is 5,902 square kilometers, and the runoff is 100 million cubic meters.

Located in Dandong City, Liaoning Province, the Pushi River is one of the larger tributaries of the Yalu River system. The Pushi River originates in the North Sifang Dingzi of Kuandian County, Liaoning Province, runs through the whole territory of Kuandian County from north to south, and joins the Yalu River about 5 kilometers below the Taipingwan Reservoir. The Pushi River is a total length of 1,212 kilometers, with an average annual runoff of 800 million cubic meters.

Located in the northern part of North Korea, the Dullu River originates from the Xiaobaeksan Mountain in the southwest of Langlim Mountain, and flows into the Yalu River from south to north along the way with tributaries such as the Qianchuan River and the Namcheon River. With a total length of kilometers and a basin area of 5,207 square kilometers, the Dullu River is the largest tributary of the Yalu River system on the North Korean side.

Located in the northern part of Korea, the Gyecheon River originates in the Gojelyeong Mountains, flows from south to north through the central part of the Gaema Plateau, and empties into the Yalu River 4 kilometers southwest of Hyesan Mountain. With a total length of kilometers and a basin area of 4,948 square kilometers, the Xucheon River is one of the larger tributaries of the Yalu River system in North Korea.

1. The Yalu River mainly flows through humid areas, with abundant precipitation and abundant river runoff.

2. The Yalu River mainly flows through the mountainous area, with a large terrain difference and a fast river flow speed.

3. The area around the Yalu River is close to the industrial zone, and the demand for electric energy is large.

4. In the past, there were many thermal power stations in Northeast China, which caused serious pollution to the atmosphere, but hydropower stations did not have pollution to the atmosphere. Therefore, from the perspective of maintaining the local ecological environment and developing the economy, more hydropower stations should be built.