The hydrological characteristics of the Huai River, the average water depth of the Huai River

Hydrological characteristics of the Huaihe River: Huaihe River Basin.

The hills on both sides of the upstream are undulating, the water system is developed, the tributaries are numerous, the flow is large, and the sediment content is small; The middle reaches are gentle, with many lake depressions; The downstream is low-lying, with large and small lakes dotted around, water networks intertwined, and channels vertical and horizontal. Heavy rain and flooding in the Huaihe River Basin.

Concentrated in the flood season 6 September.

The hydrological characteristics of the Huaihe River mainly include the following aspects:

1.The average annual runoff depth of the Huaihe River basin is about 231 mm, of which 238 mm is for the Huai River system and 215 mm for the Yishu River system. This means that the average annual rainfall in the Huai River basin is 231 mm.

2.The runoff in the Huaihe River Basin is unevenly distributed in time, mainly in the flood season. The measured water volume of each control station in the main stream of the Huaihe River accounts for about 60% of the whole year, while the water volume of the tributaries of the Yishu River system accounts for a larger proportion of the water volume in the flood season.

3.There are also spatial differences in the amount of water in the Huaihe River Basin. The rivers south of the Qinling-Huaihe River flow through humid areas, with abundant water, long flood seasons, low sediment content, and no freezing in winter.

However, the rivers in the north of the Qinling-Huaihe River flow through semi-humid or semi-arid areas, with small water volumes, short flood seasons, and frozen rivers in winter.

4.The Huai River is an important river in China, but its water quality has been affected due to soil erosion. For example, soil erosion in the upper and middle reaches of rivers such as the Liao, Hai and Yellow rivers is serious, resulting in a large amount of sediment in the rivers in these areas.

In general, the hydrological characteristics of the Huaihe River include a large average annual runoff depth but uneven time distribution, a spatial difference between north and south, and a certain water quality problem.

The average water depth of the Huai River is between 6-8 meters.

The Huaihe River starts from Tongbai Mountain and Funiu Mountain in the west, borders the Yellow Sea in the east, divides the Yangtze River basin with the Dabie Mountain, Jianghuai Hills, Tongyang Canal and the south embankment of the Rutai Canal in the south, and adjoins the Yellow River basin with the south embankment of the Yellow River and the Yimeng Mountains in the north, with a basin area of 270,000 square kilometers. The basin is bounded by the waste Yellow River, and is divided into two major water systems, the Huai River and the Yishu River, with an area of 190,000 square kilometers and 80,000 square kilometers respectively.

The Huai River originates in Tongbai Mountain, Henan Province, flows from west to east, flows through Henan, Anhui and Jiangsu provinces, and the main stream enters the Yangtze River in Sanjiangying, Yangzhou, Jiangsu, with a total length of about 1,000 kilometers. In the lower reaches of the Huaihe River, there are four main outlets: the waterway into the river, the waterway into the sea, the main irrigation canal in northern Jiangsu, and the four outlets from the Huai River to Yi. The Yishu Si River water system is located in the northeast of the Huai River, composed of the Yi River, the Shu River and the Si River, all of which originate in the Yimeng Mountains, mainly flow through Shandong and Jiangsu provinces, and flow into the sea through the Xinshu River and the Xinyi River in the east.

1. The tributaries of the Huai River system are very asymmetrical from north to south. The tributaries on the north bank are many and long, flowing through the Huanghuai Plain; The tributaries of the south bank are few and short, flowing through the mountains and hills;

2. The Huaihe River water system is bounded by the waste Yellow River, which is divided into two major water systems, the Huai River and the Yishu Si River, and the two water systems are connected through the Beijing-Hangzhou Grand Canal, the Huaishu New River and the Xuhong River;

3. The Huai River is the third largest river in the country, originating from Tongbai Mountain in Henan Province and flowing through Henan, Hubei, Anhui and Jiangsu provinces;

4. The Huai River is one of the major rivers in eastern China;

5. The lower reaches of the Huai River can be protected against the 1954 flood, which is equivalent to the flood control standard of once in 50 years.

Summary. The Huai River is the third largest river in China, and its flow varies with the seasons and years. According to China's Yellow River Water Conservancy Commission, the maximum flow rate at the Huai River hydrological station reached 3,100 cubic meters per second (in 1954), while the minimum flow was only 20 cubic meters per second (in 1969).

In general, the average annual water flow of the Huai River is about 500 cubic meters per second. However, due to the influence of natural and human factors in the Huaihe River basin, such as reservoirs, treatment and dredging projects, the water flow of the Huaihe River has been fluctuating.

The Huai River is the third largest river in China, and its flow varies with the seasons and years. According to the Rift Committee of the Yellow River Water Conservancy Commission of China, the maximum flow rate of the Huai River hydrological station reached 3,100 cubic meters per second (in 1954), while the minimum flow was only 20 cubic meters per second and sold (in 1969). In general, the average annual water flow of the Huai River is about 500 cubic meters per second.

However, due to the influence of natural and human factors in the Huaihe River Basin, such as water reclamation, treatment and dredging projects, the water flow of the Huaihe River has been fluctuating.

Fellow, I really didn't understand, I can be more specific.

The Huai River is the third largest river in China, and its flow varies with the seasons and years. According to the Rift Committee of the Yellow River Water Conservancy Commission of China, the maximum flow rate of the Huai River hydrological station reached 3,100 cubic meters per second (in 1954), while the minimum flow was only 20 cubic meters per second and sold (in 1969). In general, the average annual water flow of the Huai River is about 500 cubic meters per second.

However, due to the influence of natural and human factors in the Huaihe River Basin, such as water reclamation, treatment and dredging projects, the water flow of the Huaihe River has been fluctuating.

It is generally formed by a long rainy season and a wide range of continuous rainstorms.

Heavy rain and floods in the Huaihe River Basin are concentrated in the flood season from June to September, and mainly occur in the Huainan Mountains in June. It can occur in the whole basin in July; In August, it mostly appeared in the Funiu Mountains in the west and the Yimeng Mountains in the northeast, and typhoons and rains often occurred in the eastern coastal areas affected by typhoons.

Heavy rainfall in the basin decreased in September. Generally, from mid-June to early July, the southern part of the Huaihe River enters the plum rainy season, and the plum rainy period is generally 15-20 days, and the length can reach one and a half months.

The average annual runoff of the Huaihe River basin is 62.1 billion cubic meters, of which 45.3 billion cubic meters are in the Huaihe River system and 16.8 billion cubic meters in the Yishu River system. The average annual runoff depth of the Huaihe River basin is about 231mm, of which the Huaihe River system is 238mm and the Yishu River system is 215mm.

The annual distribution of runoff is also uneven, mainly during the flood season. The measured water volume of each control station in the main stream of the Huaihe River accounts for about 60% of the whole year, and the water volume of each tributary of the Yishu River system accounts for a larger proportion of the water volume in the flood season, about 70% and 80% of the whole year.

The flood season from May to August in the Huaihe River Basin usually rains 5 to 600 mm in three months, especially in June and July, the special plum rainy season in the Jianghuai region, the rainfall can last for one or two months. The scope is so large that it can cover the whole basin; Wet years alternate with poor years, and precipitation varies by an average of four or five times.

The weather systems that produce heavy rainfall in the Huaihe River Basin are typhoons (including typhoon inverted troughs), vortex shear, north-south shear and cold shear lines, with the former two being the majority. In the early part of the rainy season, it is mainly vortex shear, and in the later part there are typhoons. The typhoon's path covers the entire basin.

The trend of the rainstorm is generally consistent with the movement of the weather system, and the central movement of the typhoon rainstorm is related to the typhoon path. Cold peak rainstorms mostly move from northwest to southeast, and low vortex rainstorms usually move from southwest to northeast, with the north-south airflow intersecting, the shear line or front swings in the north-south and southeast-northwest directions, and the rainstorm center also moves accordingly.

Floods in the Huai River basin are generally composed of continuous rainfall and the warning water level at all major control stations. Heavy to heavy rain continued to fall in the Huaihe River Basin, and heavy rains occurred in some areas. The main stream of the Huai River exceeded the warning water level in its entirety, and some sections of the river exceeded the guaranteed water level, resulting in a basin-wide flood second only to 1954 since the founding of the People's Republic of China.