The function of the reservoir is to store water, so why do the reservoirs discharge floods frequentl

Reservoirs frequently discharge floods because the reservoir is already at its highest saturation, just like if you pour more water into a cup than the cup can handle, it will overflow.

Because the discharge has a great impact on the flood discharge area below, the road can become a small stream at least and a river at worst. If the warning water level is exceeded, the reservoir is in danger of bursting, so the reservoir staff must ask their superiors for instructions before releasing water. When it rains continuously, if the water level does not reach the highest position, it is not easy to release water and hail.

When the reservoir was built, many experts accurately calculated the pressure resistance of the reservoir according to its construction material, depth and size, and then gave the maximum storage capacity of the reservoir and drew the highest water mark.

In an exclusive interview with Voice of China, Yang Kun, deputy director of the Flood Prevention and Disaster Reduction Center of the Ministry of Water Resources, explained that reservoirs and hydropower stations with flood prevention tasks should be carried out in strict accordance with the approved flood season operation plan and flood relief plan. The plan is based on relevant data and trends during the flood season. The accuracy of the data of hydrological forecasting is related to the accuracy of weather forecasting.

Therefore, it is very difficult to dispatch accurately in real time, and the flood dispatch of the reservoir is also relatively complex, so it is necessary to leave enough time for the downstream people to transfer and cannot be decided suddenly. There is no necessary connection between upstream and downstream reservoir discharges.

This is for the sake of protecting the safety of the country, but also for the sake of the economic Changfan Late interests, this situation can only choose to discharge the flood, otherwise once the dam collapses, the impact of the car bend is difficult to estimate.

It is because only in this case can it have a better effect, and it will be more thorough.

Because the reservoir is a reservoir, it is used for flood control irrigation, and after the reservoir is full of water, it cannot exceed the warning line, so it will discharge the flood. The remaining water will be stored for irrigation during the dry season. Because the reservoir is a reservoir, it is used for flood control and irrigation, and after the reservoir is full of water, it cannot exceed the warning line, so the flood will be discharged.

The surplus water will be stored for irrigation during the dry season.

It is to divert the flow and free up storage capacity for heavy rainfall. On the other hand, the flood discharge of the reservoir is actually a good thing for the urban river, the flood discharge can use the kinetic energy generated by the height of the dam to the bottom of the river to wash the river, and the river rubber that runs through the city can be completely purified and improve the ecological environment.

Because the flood discharge will lead to the water level in the short term, and because of the continuous rainy days, the soil on both sides of the river is close to saturation, the ability to absorb water is poor, and the rainwater is all into surface runoff, and once it encounters heavy rainfall, it is easy to form waterlogging, so remind the public not to go to the river on both sides of the city river for a walk.

It is to divert the flow and free up storage capacity for heavy rainfall. On the other hand, the flood discharge of the reservoir is actually a good thing for the urban river, the flood discharge can use the kinetic energy generated by the height of the dam to the bottom of the river to scour the river, and the river that runs through the city can be completely purified and improve the ecological environment.

Because the flood discharge will lead to the water level in the short term, and because of the continuous rainy days, the soil on both sides of the river is close to saturation, the ability to absorb water is poor, and the rainwater is all into surface runoff, and once it encounters heavy rainfall, it is easy to form waterlogging, so remind the public not to go to the river on both sides of the city river for a walk.

Typhoon "Kanu" hit,In order to prevent the reservoir from being in danger, the Hainan Reservoir was released ahead of schedule.

On October 14, 2017, the Shibi Reservoir in Penglai Town, Wenchang, Hainan Province, was pre-discharged ahead of schedule to lower the water level.

According to the Hainan Provincial Meteorological Bureau at 20 o'clock on the evening of the 14th, this year's No. 20 typhoon "Kanu" (strong tropical storm level) may make landfall in the coastal areas from Wenchang, Hainan to Zhanjiang City, Guangdong Province (12 13 level). In order to cope with the possible impact of Typhoon "Kanu" No. 20 this year, a reservoir in Wenchang opened its flood gates.

On October 14, 2017, in Qionghai, Hainan Province, the flood peak of the Niululing Reservoir in Qionghai passed through the dam of the hydropower station.

On the same day, in order to defend against the heavy precipitation brought by Typhoon "Kanu", the Qionghai Niululing Reservoir began to discharge the flood in advance from October 13 to reserve the storage capacity, with a maximum discharge capacity of 2,000 cubic meters per second, and by 7 p.m. on the 14th, the discharge volume was controlled at 1,337 cubic meters per second.

Niululing Reservoir is located in Huishan Township, Qionghai City, the main stream of Wanquan River in Hainan, with a total reservoir capacity of 777.9 million cubic meters, which plays a very important role in flood control and flood control.

It is understood that Hainan Province issued a typhoon level 2 warning at 20:00 on October 14, 2017: Typhoon "Kanu" (strong tropical storm level), at 19 o'clock on the 14th, the center is located at north latitude and east longitude, that is, on the sea surface about 820 kilometers south-east of Xuwen County, Zhanjiang City, Guangdong Province, with a maximum wind force of 11 near the center and a wind speed of 30 meters per second.

It is expected that "Kanu" will move west-northward at a speed of about 20 kilometers per hour, gradually approaching the coastal areas from western Guangdong to the northeast of Hainan Island, and continue to strengthen in intensity, reaching the strongest typhoon or strong typhoon (12 14, 33 42 m s), and will make landfall in the coastal areas from Wenchang, Hainan to Zhanjiang City, Guangdong Province from the early morning to the morning of the 16th (12 13 magnitude, 33 40 m s), and the maximum possible landfall will be in the coastal areas around Xuwen and Zhanjiang.

Because flood discharge is one of the flood control functions of reservoirs.

In the case that there is no sluice gate in the spillway, in the management and operation stage of the reservoir, if water can be used before the flood season, the water level of the reservoir can be reduced to the limit water level of the reservoir, and the restricted water level of the reservoir is lower than the height of the top of the spillway, and the water level is limited to the height of the top of the spillway, and the water storage capacity of the room can play the role of flood storage. Part of the flood water stored in the reservoir can be used for profit in a planned way during the dry season.

When the spillway is equipped with a sluice gate, the reservoir can play a greater role in flood storage, and the reservoir can adjust the size of the flood discharge volume by changing the opening of the sluice gate. Due to the use of gate control, the flood control water level of this kind of reservoir can be higher than the top of the spillway weir, and the gate opening can be adjusted at any time during the flood discharge process to control the flood discharge flow, which has the dual functions of flood detention and flood storage.

First of all, it is very certain that it can be compensated. The lawful private property of individuals is subject to the law!

Under normal circumstances, personal losses are compensated by the beneficiaries of the flood discharge, such as the losses caused by the sudden release of water from the upstream power station to the downstream farmers should be compensated by the power station. However, whether it is because of the flood discharge from the Jialu River in Zhengzhou to Zhoukou or the flood discharge in Anhui, it is an emergency avoidance behavior, and according to the regulations, the emergency avoidance ZF can not be held liable or only give appropriate compensation. Compensation varies from case to case.

According to the relevant provisions of the Flood Control Law, departments at all levels should do a good job in post-disaster recovery and relief work. After the flood storage and detention area, compensation or assistance shall be given in accordance with the regulations. However, the specific amount of compensation is not specified.

According to the compensation standard of the "Compensation Measures", it can be used for reference. Crops, professional breeding and economic forests shall be compensated according to -50 and 40-50 of the average output value in the first three years of flood storage, respectively. (2) 70% compensation for the loss of housing damage caused by water, and (3) 50% compensation for household agricultural production machinery and other consumer goods.

The reservoir is mainly used to irrigate farmland, and some are used to provide drinking water for the city, and some are like the Three Gorges Reservoir of the Yangtze River, which also takes into account the functions of power generation, water storage, peak staggering and peak regulation, and improving shipping conditions. Under normal circumstances, the reservoir is full of water during the dry season, and a part of the water is released during the wet season, so that it can play a staggered front when the flood peak hits. The function of adjusting the front reduces the pressure on the downstream.

However, if there is an unforeseen flood, the reservoir's storage role is limited, and the long-term high water level will cause the dam to be in danger, so it can only release water. In fact, the reservoir has been released in advance, but the weather and rain forecast is not so accurate, and it feels that the reservoir has not released water in advance, and the water will be released only when the police line is reached.

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In order to ensure the safety of reservoirs and dams, the Flood Control Law of the People's Republic of China stipulates that "during the flood season, the reservoir shall not restrict the storage of water above the water level of Shanlizi without authorization during the flood season". When the water level of the reservoir exceeds the flood limit, if the flood is not discharged, there may not be enough empty capacity to accept future water from the upstream, resulting in a rise in the water level, which may inundate towns, houses and shops upstream of the reservoir, causing huge losses and shortages.