Respectively, the hydrological characteristics of the Liaohe River, the Yellow River and the Yangtze

Affected by the temperature, the spring ice and snow melt brings spring news, affected by the monsoon climate, the precipitation is concentrated in summer, and there is a news period in summer and autumn, so they have two flood periods a year, and the downstream is mostly plain land, sediment accumulation, riverbed elevation, slow flow rate, so that the water level is **, easy to cause floods. The most effective way is to dredge rivers, build large reservoirs, divert water across river basins, such as the Three Gorges Water Conservancy Project, divert difficult water to the north, and improve river channels.

Upper reaches of the Yellow River: from the source to Hekou Town in Inner Mongolia Main features: the source of the river is clear, the canyon section is rich in water energy, and the water flow of the Hetao section is slow;

Middle reaches of the Yellow River: from Hekou Town to Old Mengjin in Henan Main features: multiple tributaries, multiple canyons, large sediment content;

The lower reaches of the Yellow River: from the old Mengjin to the estuary of Shandong Main features: slow water flow, sediment deposition into an "above-ground river";

The main treatment measures: a construction of water conservancy, upper and lower drains; b. Returning farmland to forests, grasslands, and flood storage areas; c. Reinforcement of dikes.

Summary. Hello! The main reason for the frequent occurrence of flood disasters in the Yangtze River basin is that the ecology of the upper and middle reaches of the Yangtze River basin has been greatly damaged, resulting in a large amount of soil erosion and serious damage to vegetation, which cannot play the role of water conservation.

1.Let's talk about the reasons for the frequent floods in the Yangtze River basin 2Let's talk about the problems of the Yellow River round socks liquid, how to deal with it? 3.What are the characteristics of oranges in the upper, middle and lower reaches of the Yangtze River, and the reason for the existence of good swimming?

Hello! The main reason for the frequent flood disasters in the bend of the Yangtze River is that the ecology of the upper and middle reaches of the Yangtze River basin has been greatly damaged, buried and damaged, resulting in a large amount of soil erosion, serious vegetation damage, and cannot play the role of water conservation.

The problem with the Yellow River is that there is serious soil erosion and high sediment content. The root cause of the damage of the Huangzhu Early River is that the large amount of sediment enters the river, and the key to the control of the Yellow River in the downstream siltation channel is sand control, so strengthening the soil and water conservation of the Xinxian Bridge in the middle reaches of the Loess Plateau is the fundamental treatment of the Yellow River.

Upstream, focus on development, reduce vegetation damage, and prevent soil erosion.

In the midstream, appropriate mining of minerals, a variety of vegetation, and the reduction of sediment carried away by the current.

Downstream, pay attention to combing the river, reduce sediment accumulation, and cultivate appropriate land.

The Yellow River, with a total length of about 5,464 kilometers and a basin area of about 10,000 square kilometers, is the fifth longest river in the world, the Yellow River originates from the northern foot of Bayan Kala Mountain on the Qinghai-Tibet Plateau, flows through 9 provincial-level political regions (Qinghai, Long, Sichuan, Ning, Inner Mongolia, Shaanxi, Shanxi, Shanxi, Henan, Shandong), and flows into the Bohai Sea.

Inner Mongolia Hekou Town is the upper reaches, the upper reaches of the Yellow River in Qinghai Province, flowing through the Qinghai-Tibet Plateau, the water volume is not large, the water flow is gentle, and the river water is clear; From Longyang Gorge in Qinghai Province to Liujiaxia in Gansu Province to Qingtong Gorge in Ningxia, the canyon section is rich in water energy resources; In Ningxia and Inner Mongolia, the Yellow River flows through a gentle terrain area, with a gentle flow and an arid climate. Hekou Town to Mengjin in Henan Province is the middle reach, flowing through the Loess Plateau, receiving tributaries such as the Fen River and the Wei River, and the water volume increases, especially the sediment content of the river water increases greatly (90% of the sediment of the Yellow River comes from here); The lower reaches of the Yellow River are lower reaches, flowing through the North China Plain, due to the long-term artificial construction of embankments to restrain water, the riverbed of the lower reaches of the Yellow River is several meters higher than the ground on both sides, forming an "above-ground river", so the water volume along the lower reaches of the Yellow River is gradually decreasing, and there are few tributaries, and it is prone to flooding.

However, due to the excessive amount of water diversion used for production and living in the middle and upper reaches of the river, the downstream river section is cut off almost every year in late spring and early summer.

The main tributaries of the Yellow River are: Tao River and Huangshui River in the upper reaches, and Wuding River, Yan River, Fen River and Wei River in the middle reaches (its tributaries include Jing River and Luo River).

In recent years, the problem of the Yellow River being cut off has increasingly attracted the attention of China's policies. In the future, on the one hand, we should strengthen the construction and management of reservoirs, and regulate peaks and relieve droughts; On the other hand, it is necessary to strengthen the unified allocation and management of water resources in the whole basin, and enhance the awareness of water conservation and water protection; At the same time, it is necessary to speed up the demonstration of the project of "diverting the Yellow River from the Yellow River" in the upper reaches of the Yellow River.

The flood-prone sections of the Yangtze River basin are (, and the causes are analyzed from both self-fighting and social aspects.

The middle and lower reaches of the Yangtze River.

Natural causes: There are many plains in the middle and lower reaches of the Yangtze River, and the terrain is low and flat, which is not conducive to the flooding; It belongs to the monsoon climate, with a lot of precipitation and a concentrated base guess, and a lot of heavy rain in summer; The north and south tributaries flow into more.

Social causes: Serious damage to vegetation in the upstream area, resulting in soil erosion, elevation of the middle and lower reaches of the riverbed, sediment accumulation, and the formation of above-ground rivers; People in the middle reaches of the lake have reduced the area of the lake and weakened the lake's ability to store floodwaters.