What is the boundary between the upper and middle reaches of the Yangtze River, and what is the boun

The main stream of the Yangtze River is divided into upper, middle and lower reaches according to the characteristics of the river channel and the topography of the basin. From Yibin to Yichang, Hubei Province, it is called the upper reaches, with a length of about 4,500 km and a basin area of 1 million km2. Yichang to Jiangxi Lake Estuary is called the middle reach, more than 950km long, the basin area is 680,000 km2, of which Zhicheng to Chenglingji River section, commonly known as Jingjiang, about 340km long, its south bank has Songzi, Taiping, Lotus Pond, Tuning String four mouths (Tuning String Mouth has been blocked in 1959) to discharge the river water into Dongting Lake, and the Dongting Lake water system of Hunan, Zi, Yuan, Li convergence, and then in Yueyang Chenglingji into the main stream of the Yangtze River.

The Yangtze River turns northeast after passing through Chenglingji, and when it reaches Wuhan, the Hanjiang River joins it, and then flows eastward to the mouth of the lake and receives the water systems of Gan, Fu, Xin, Rao, and Xiu of Poyang Lake. From the mouth of the lake to the mouth of the Yangtze River, it is called the downstream, with a length of 938 km and a basin area of about 120,000 km2. The plain area of the middle and lower reaches of the Yangtze River is a key area for flood control.

It's definitely Yichang, it's true, it's on the social book of the first year of junior high school! And Yibin is not the dividing line of the Yangtze River at all. The upper and middle reaches are Yichang, and the middle and lower reaches are Hukou. Trust me, that's right!

Yibin above is the upstream, and Yichang is below the downstream.

Nanjin Pass is the starting point of the Three Gorges of the Yangtze River and the dividing line of the middle and upper reaches of the Yangtze River. Located here, the Xiling Gorge Scenic Area is a national scenic spot and a provincial tourist resort. There are mainly scenic spots such as Sanyou Cave, Longquan Cave, Xianren Creek, Xiajiao Creek, White Horse Cave, Peach Blossom Village, Ancestral Temple and Wuzhou Leisure Park.

After passing through Nanjin Pass, the river surface narrows from more than 2,000 meters to 300 meters, so the magnificent picture of colorful and meteorological scenery will come into your eyes.

The upper middle is Yibin, Hubei, and the lower middle is Jiangxi Hukou.

Yangtze River: Above Yichang is the upper reach.

Yichang - Hukou is the middle reach.

Below the mouth of the lake is downstream.

The dividing point of the upper, middle and lower reaches of the Yangtze River is Yichang and Hukou. The dividing line of the upper and middle reaches of the Yangtze River is Yichang, and the dividing line of the middle and lower reaches is Hukou. Hukou County, Jiujiang City, Jiangxi Province, is located at the junction of Hubei, Anhui and Jiangxi provinces, is a famous tourist county in China, an economically strong county in Jiangxi Province, Hukou County is located in the north of Jiangxi Province, on the south bank of the Yangtze River.

The boundary between the middle and lower reaches of the Yangtze River.

The boundary point of the middle and lower reaches of the Yangtze River - Hukou (Jiangxi).

Hukou was built in the Southern Tang Dynasty (950 AD), because it is located in the mouth of Poyang Lake into the Yangtze River, it is the "north gate of Jiangxi water", known as "the key to the rivers and lakes, the thoroughfare of the three provinces". The territory is bordered by Pengze in the east, Duchang in the south, Xingzi and Lushan District in the west, and Susongxiang River in Anhui Province in the north.

The dividing point of the upper and middle reaches of the Yangtze River - Yichang (Hubei).

Yichang City is located in the west (south) of Hubei, at the junction of the upper and middle reaches of the Yangtze River, in the transition zone from the mountainous area of western Hubei to the Jianghan Plain.

The middle and lower reaches of the Yangtze River plain.

The middle and lower reaches of the Yangtze River Plain refers to the coastal strip plain of the middle and lower reaches east of the Three Gorges of the Yangtze River in China, which is one of the three major plains in China, spanning 7 provinces and cities in China, including Hubei, Hunan, Jiangxi, Anhui, Jiangsu, Zhejiang, and Shanghai.

The middle and lower reaches of the Yangtze River Plain stretches from the eastern foot of Wushan Mountain in the west, to the Yellow Sea and the East Coast in the east, to the Tongbai Mountain, the southern foot of Dabie Mountain and the Huanghuai Plain in the north, to the Jiangnan hills and the Qiantang River in the south, and the Yangtze River Plain north of Hangzhou Bay, with a length of about 1,000 kilometers from east to west, a width of 100,400 kilometers from north to south, and a total area of about 200,000 square kilometers. Generally, the altitude is 5 100 meters, and most of them are below 50 meters above sea level. The average annual temperature is 14 18 and the annual precipitation is 1000 1500 mm.

The boundary point of the middle and upper reaches of the Yangtze River - Yichang The boundary point of the middle and lower reaches of the Yangtze River - Hukou

The main stream of the Yangtze River, according to the characteristics of the river and the topography of the river basin, is divided into the upper, middle and lower reaches: from Yibin to Yichang, Hubei Province, it is called the upper reaches, with a length of 4,529 kilometers, accounting for the length of the Yangtze River. The area of the basin is 10,000 square kilometers, accounting for the area of the basin.

Yichang to Jiangxi Hukou is called the middle reach, with a length of 927 kilometers, accounting for the length of the Yangtze River. The basin covers an area of 10,000 square kilometers, accounting for the basin area.

From the mouth of the lake to the mouth of the Yangtze River, it is called the lower reaches, with a length of 844 kilometers, accounting for the length of the Yangtze River. The area of the basin is 10,000 square kilometers, accounting for the area of the basin.

The middle and lower reaches of the Yangtze River plain.

The middle and lower reaches of the Yangtze River Plain refers to the coastal strip plain of the middle and lower reaches east of the Three Gorges of the Yangtze River in China, which is one of the three major plains in China, spanning 7 provinces and cities in China, including Hubei, Hunan, Jiangxi, Anhui, Jiangsu, Zhejiang, and Shanghai.

The middle and lower reaches of the Yangtze River Plain stretches from the eastern foothills of Wushan Mountain in the west, to the Yellow Sea and the eastern coast in the east, to the Tongbai Mountain, the southern foot of Dabie Mountain and the Huanghuai Plain in the north, and to the Jiangnan hills and the Qiantang River and the Yangtze River Plain north of Hangzhou Bay in the south, with a length of about 1,000 kilometers from east to west and a width of 100,400 kilometers from north to south, with a total area of about 200,000 square kilometers.

It is mainly composed of six plains, including the Jianghan Plain, the Dongting Lake Plain, the Poyang Lake Plain, the Anhui-Jiangsu Yangtze River Plain, the Lixiahe Plain and the Yangtze River Delta Plain. Generally 5,100 meters above sea level, mostly in the sea. Pull 50 meters or less.

The average annual temperature is 14 18 C, and the annual precipitation is 1000 1500 mm.

The dividing line of the upper and middle reaches of the Yangtze River is Yichang, and the dividing line of the middle and lower reaches is Hukou.

1. The section of the Yangtze River above Yichang City, Hubei Province is the upper reaches of the Yangtze River.

2. The section of the Yangtze River between Yichang City, Hubei Province and Hukou County, Jiujiang City, Jiangxi Province is the middle reaches of the Yangtze River.

3. The section of the Yangtze River below Hukou County, Jiujiang City, Jiangxi Province is the lower reaches of the Yangtze River.

1. The section of the Yellow River above Hekou Town, Tuoketuo County, Inner Mongolia Autonomous Region is the upper reaches of the Yellow River.

2. The section of the Yellow River between Hekou Town, Tuoketuo County, Inner Mongolia Autonomous Region, and Mengjin County, Luoyang City, Henan Province is the middle reaches of the Yellow River.

3. The section of the Yellow River below Mengjin County, Luoyang City, Henan Province is the lower reaches of the Yellow River.

The Qinling Mountains are the watershed between the Yangtze River and the Yellow River. South Qinling Mountains south of the main ridge of the Qinling Mountains, the mountain gradually descends from north to south, originating from the Baohe River, Huangshui River, Youshui River, Meridian River, Xunhe River, Danjiang River, etc. near the main ridge, and flows into the Hanjiang River from north to south or southeast along the surface slope, the Jialing River flows into the Yangtze River in Chongqing, Sichuan, and the Nanluo River flows into the Yellow River from west to east to western Henan.