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Yanhe River is a tributary of the right bank of the Yellow River and the upper section of the middle reaches of the Yellow River, from Hekou Town to Longmen section, located between 108°45-110°28 east longitude and 36°23-37°17 north latitude, originating in Zhoushan, Tianciwan Township, southeast of Jingbian County, Shaanxi Province, flowing from northwest to southeast through Zhidan, Ansai, Pagoda, Yanchang and other four counties and districts, and joining the Yellow River near the Liangshui'an of Nanhegou Township, Yanchang County. The main stream of the Yanhe River has a total length of 7725 km2, an average slope of about km2, and the main tributaries are Xingzi River, Xichuan, Panlong River, and Nanchuan River[2]. The average annual precipitation in the basin is 9, and the main types of disasters are drought, frost, hail and heavy rain.
The area of loess hills and gullies in the basin accounts for 90 of the whole basin, of which the loess beam-like hilly valley area is above the extension, the river terrace area along the river between Ansai and Yanchang is the loess wide beam remnant valley area below the extension, and the loess covered stony hilly valley area at the outlet of the basin[2].
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Yanhe Town is located on the north bank of the Maxian River, 17.5 kilometers west of Yanshou County, Heilongjiang Province. It is connected to Yanshou Town by Bali Bridge in the east, Yan'an and Ping'an across the river by the Maxian River in the south, Shangzhi is adjacent to Baligang in the west, and Qingchuan Township is bordered by Qingchuan Township in the north. The town is located in Liuhetun, east longitude 128°08, north latitude 45°23.
The total area of the town is 133 47 square kilometers, with 14 villages and 43 natural tuns under its jurisdiction. There are 3,672 households and 17,277 people, including 1,548 Koreans, 448 Manchus, 1 Li, and the rest are of Han nationality.
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Yanhe, formerly known as District Water, Qujin Water, Weishui, Yanshui, etc., is a first-class tributary of the Yellow River and the second largest river in Yan'an City. It is also the second major river in northern Shaanxi, with a total length of kilometers, originating near Baiyu Mountain and flowing into the Yellow River from northwest to southeast.
The Yan River originates in Zhoushan, Tianciwan Township, Jingbian County, flows from northwest to southeast, flows through Zhidan, Ansai and Yan'an, and joins the Yellow River near the Liangshui bank of Nanhegou in Yanchang County, with a basin area of 7,725 square kilometers. Since Yan'an is the base of the revolution of the Communist Party of China, the Yan River is known as the "Mother River of the Chinese Revolution", and the Baota Mountain and the Yan River are the most concrete images of Yan'an.
Watershed profile
The topography of the basin is high in the northwest and low in the southeast, and the topography is obviously divided into three types. The upstream from the source of the river to Zhenwu Cave is the hilly and gully area of the Liangliang, with many beams and small ridges, the riverbed ratio is large, the vegetation is scarce, the erosion is strong, and the soil erosion is serious.
The middle reaches from Zhenwudong to Ganguyi are hilly and gully areas, with narrow beams and small valleys, wide river valleys, developed terraces, and erosion is not as serious as that of the upstream. Ganguyi to the downstream of the estuary, is a broken original area, the original surface is narrow, the gully is developed, and the soil erosion is not as serious as that in the middle and upper reaches.
The Yanhe River is a well-developed river in the middle reaches, and the characteristics of the river channel are as follows. The upstream mountain is deep and deep, the slope is steep and the valley is narrow, the beach is many and the water is rapid, the average of the riverbed ratio is strong, the main "V" shape of the river valley, the river channel is curved, only between Dagou Village and Sickle Bay Village, there are 72 bends in the distance of 14 kilometers, and the narrowest part of the riverbed is only about 10 meters.
In the middle reaches of Jingudong to Ganguyi, the river valley is open, in the shape of "U", the average width of the river valley is about 800 meters, the widest can reach 1200 meters, the terraces on both sides of the river are wide and flat, and there are many tributaries.
Ganguyi to the mouth of the river, the river deeply cuts the bedrock, forming a meandering canyon with narrow valley, steep bank and many rapids. The distance of 20 kilometers from the Flame Mountain to the mouth of the river, the cliffs on both sides are steep, the valley width is only 20 30 meters, and gradually becomes a linear river valley, the famous dangerous beaches are Zhangjiatan and Yanjiatan, and the drop difference can reach 4 5 meters.
The structure of the Yanhe River is dendritic, and the main tributaries are Xingzi River, Pingqiao River, Xichuan River, Nanchuan River, Panlong River, etc., especially in the middle and upper reaches, the river network density is kilometers and square kilometers, and the larger tributaries are distributed in this section. The downstream tributaries are short and plume-shaped. The average width of the basin is 29 km, with the maximum width of km and the minimum width of the estuary section at 7 km.
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Yanhe River symbolizes the days that people spent in Yan'an. The Yan River is a tributary of the right bank of the upper middle reach.
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The Yan River is a first-class tributary of the Yellow River, the second largest river in northern Shaanxi, and the "mother river" of the Chinese revolution.
The Yan River originates in the Gaoshan Mountain of Tianci Bay, Jingbian County, flows through Ansai County and Baota District, and flows into the Yellow River on the shore of Yanchang Liangshui, with a total length of 287 kilometers and a drainage basin area of 7,321 square kilometers, accounting for 20% of the total area of the city. There are mainly tributaries such as Pingqiao River, Xingzi River, Xichuan River, Nanchuan River, and Panlong River.
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It refers to the Yan'an River Branch, the Yan River.
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The Yan River refers to a tributary of the Yellow River.
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The Yan River is a first-class tributary of the Yellow River and is the city of Yan'an.
The second largest river is also in northern Shaanxi.
The second great river, with a total length of kilometers, originates near Baiyu Mountain and flows into the Yellow River from northwest to southeast. The Yan River originates in Jingbian County.
Zhoushan, Heciwan Township, Tianlun, flows from northwest to southeast, flows through Zhidan, Ansai, Yan'an, and is in Yanchang County.
The Yellow River flows into the Yellow River near the cool bank of Nanhegou, with a basin area of 7,725 square kilometers.
Since Yan'an is the base of the Chinese Communist Party's revolution, the Yanhe River is known as the "Mother River of the Chinese Revolution, Pagoda Mountain."
The water of the Heyan River is the most concrete image of Yan'an.
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1. Yan River is a first-class tributary of the Yellow River and is the city of Yan'an.
The second big river is also in northern Shaanxi.
of the two great rivers. The total length of the river is 7,725 square kilometers. It originates near Baiyu Mountain and flows into the Yellow River from northwest to southeast.
2. Yanhe River is known as the sacred mountain of the Chinese revolution, and the mother of the banquet is only close to the river, and the pagoda mountain and Yanhe are the most specific symbols of Yan'an, the holy land of the revolution.
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"Inheritance of the scriptures is as good as water, and the years are open in the stone". Inheritance: Generally refers to the process of teaching and inheriting certain knowledge, skills, teachings, etc. between master and apprentice.
process, including time. Sutra: scriptures, scriptures.
Shang: Gao Ye, the Emperor of Heaven, the God of Heaven. If:
Shun also. —Erya Release. Water:
Quasi-also. - Sayings. Quasi, flat also.
The world is not flat in the water. - Interpretation.
Inheritance of the scriptures refers to the inheritance of the classics, which must be based on a high place and obey the level and level.
Years (time). Stone, called grinding. Shi Cheng, when the pillar is just down.
Middle: **, among the Quartet. Positive also.
Heart also. Inside also. Half also.
Open: Zhang Ye. - Sayings.
Guan: Han Yun, 平音 (guān): sound official.
Boya "See. "Orthography" farsighted, upward-looking; Myopia and downward vision are coming.
The stone of the years in the view of the mountain means that the stone of life in the years is inherited, and it is necessary to open the upward view and farsightedness from the heart in the middle of the heart, that is, to stand at the highest place and look at the whole world.
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A river in Yan'an is a river in the holy land of the revolution, and it has nurtured how many Chinese sons and daughters have grown up, and they have gone to the battlefields in various places, throwing their heads and spilling their blood. Yan'an is the basket of the Chinese revolution, and the Yanhe River is the blood of the holy land of Yan'an, and it is also the mother river of the Chinese revolution.
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Yan'an's Yanhe River has a long history, and he has witnessed history with Red Yan'an and revolutionary ancestors in modern times.
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It is the mother river of the local area that nourishes the people on both sides.
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It's not clear about people's lives, and I don't know much about this aspect.
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The introduction of the union is that the union is a beautiful landscape, the landscape attractions well, then he has a tour there can also enjoy the cool is very good.
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Yanhe, formerly known as district water, to Jin water, Weishui, Yanshui, etc. It is a first-class tributary of the Yellow River and the second largest river in Yan'an City. It is also the second major river in northern Shaanxi, with a total length of kilometers.
The Yan River originates in Zhoushan, Tianciwan Township, Jingbian County, flows from northwest to southeast, flows through Zhidan, Ansai and Yan'an, and joins the Yellow River near the Liangshui bank of Nanhegou in Yanchang County.
Since Yan'an is the base of the revolution of the Communist Party of China, the Yan River is known as the "Mother River of the Chinese Revolution", and the Baota Mountain and the Yan River are the most concrete images of Yan'an.
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The Yan River is the second largest river in Yan'an City. It is also the second major river in northern Shaanxi, with a total length of kilometers.
It originates near Baiyu Mountain and flows into the Yellow River from northwest to southeast. The Yan River originates in Zhoushan, Tianciwan Township, Jingbian County, flows from northwest to southeast, flows through Zhidan, Ansai and Yan'an, and joins the Yellow River near the Liangshui bank of Nanhegou in Yanchang County, with a total length of kilometers and a basin area of 7,725 square kilometers.
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Yanhe is in Yan'an, Shaanxi.
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Thank you for your interest.
The Yan River is the second largest river in Yan'an City. It is also the second major river in northern Shaanxi, with a total length of kilometers. It originates near Baiyu Mountain and flows into the Yellow River from northwest to southeast.
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There could be many reasons why the Yan River is out of water, and here are some possible factors:
1.Climate change: Global warming has led to a decrease in glacier melting, rainfall, and evaporation in snow-capped mountains, resulting in a decrease in river water supply.
2.Human activities: Pollution, development and utilization caused by human activities such as urbanization and industrialization, as well as the use and destruction of water resources, may lead to a decrease in the amount of water in rivers.
3.Hydrogeological factors: Overexploitation of groundwater in downstream areas has led to a drop in the water table, which affects the recharge of the river.
4.Geography: The Yanhe River Basin may be located in an arid region, with scarce precipitation and high evaporation, resulting in a lack of water sources for the river.
5.Water conservancy projects: There may be a large number of water conservancy projects in the Yanhe River Basin, such as reservoirs and dams, which may change the natural water cycle pattern and lead to water shortage in the river.
To determine the main cause of the lack of water in the Yan River, it is necessary to comprehensively consider various factors, including climate, geographical environment, human activities, etc., and conduct in-depth research and analysis.
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1. Arid desert belting: Due to geographical location and climate factors, the Yanhe River Basin is a semi-arid area. Coupled with the impact of human activities, the input of surface water is more than the output, the overexploitation and exploitation of groundwater, overgrazing and other factors, resulting in water shortage and the aggravation of drought and desertification.
2. Dry period: Due to natural factors such as climatic conditions and decreasing precipitation, the amount of water in the main stream of the Yanhe River decreases significantly from winter to early spring every year, and there is a dry period for a period of time.
3. Human factors: Due to human economic activities, such as trade unions, agriculture, urbanization, etc., which have a huge impact on the water quality and quantity of rivers. Factors such as over-exploitation of groundwater, industrial pollution, and fishing pressure have also exacerbated the deterioration of the river's water condition.
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