GB 17621-1998 Specification for reservoir operation of large and medium-sized hydropower stations
Some standard content:
GB17621—1998
In order to carry out reservoir dispatch in a scientific, reasonable and economical manner, ensure the safety of hub projects, give full play to the comprehensive utilization benefits, improve the level of reservoir dispatch management, and realize the standardization, institutionalization and scientificization of reservoir dispatch, this standard is specially formulated according to the arrangement of the 1996 National Standard Plan Project of the State Bureau of Technical Supervision (Document No. 32 of the State Bureau of Technical Supervision [1996]). This standard stipulates the principles, tasks, methods, external conditions and scientific management requirements for the dispatch of large and medium-sized hydropower stations. This standard is based on the "Electricity Law of the People's Republic of China", "Water Law of the People's Republic of China", "Flood Control Law of the People's Republic of China", "Flood Control Regulations of the People's Republic of China" and "Grid Dispatching Management Regulations of the People's Republic of China", and refers to the dispatching procedures, systems and relevant standards and specifications of large and medium-sized reservoirs under the power, water conservancy and other departments, absorbs the main experience and lessons of the dispatching of large and medium-sized hydropower stations since the founding of the People's Republic of China, and widely solicits the opinions of experts and scholars from operation, design, scientific research, colleges and universities, etc. After several discussions, revisions and reviews, this standard has been passed. This standard was proposed by the Ministry of Electric Power Industry.
This standard is under the jurisdiction of the National Electric Power Dispatching and Communication Center. The main responsible drafting unit of this standard is the National Electric Power Dispatching and Communication Center, and the participating units are the Central China Electric Power Administration, the Northwest Electric Power Administration Dispatching and Communication Bureau, and the Gansu Electric Power Industry Bureau. The main drafters of this standard are Ren Zhaohong, Yin Wenyan, Pu Run, Zhu Jiaoxin, and Tang Yong. This standard is interpreted by the National Electric Power Dispatching and Communication Center. 126
1 Scope
National Standard of the People's Republic of China
Specification of reservoir operation for large and medium-sized hydropower stations
Specification of reservoir operation for large and medium-sized hydropower stationsGB 17621—1998
This standard specifies the principles, tasks, methods, external conditions and scientific management requirements for reservoir operation of large and medium-sized hydropower stations. This standard is applicable to reservoirs of large and medium-sized hydropower stations, and other reservoirs can be used as a reference. 2 General Provisions
2.1 Basic principles of reservoir dispatching: According to the tasks, parameters, indicators and relevant application principles determined in Design 1, the comprehensive utilization benefits of reservoirs should be fully utilized under the premise of ensuring the safety of hub projects. 2.2 Hydropower stations connected to the power grid must obey the unified dispatching of the power grid. For reservoirs that undertake downstream flood control tasks during the flood season, the use of flood control storage capacity above the flood control limit water level during the flood season must be subject to the command and supervision of the flood control command organization with jurisdiction. 2.3 The reservoir dispatching management unit and its superior department in charge should strengthen the leadership of reservoir dispatching work, establish full-time institutions, improve rules and regulations, equip professional and technical personnel, pay attention to personnel training, and continuously improve the quality of personnel and technical and management levels. 2.4 The reservoir dispatching management unit must have complete reservoir design data, master and understand the basic conditions of natural geography, hydrology and meteorology, social economy and comprehensive utilization in the upstream and downstream basins of the reservoir, and provide a reliable basis for reservoir dispatching work. 2.5 The design parameters and indicators of the reservoir are the basis for guiding the operation and dispatch of the reservoir, and shall not be changed arbitrarily without approval. 2.6 The main contents of reservoir dispatching work include: preparing reservoir dispatching plans and operation plans, timely mastering, processing and transmitting information such as hydrology, meteorology and reservoir operation, and conducting hydrological Meteorological forecast, implementation of reservoir dispatching and operation and analysis and summary, 2.7 Reservoir dispatching management units and their superior competent departments should fully adopt advanced technologies and equipment, strengthen scientific research, actively carry out automatic water situation monitoring and reporting, water regulation automation and optimized dispatching, and continuously improve the level of reservoir dispatching. 2.8 Reservoir dispatching management units should formulate reservoir dispatching and operation procedures based on this specification and in combination with specific circumstances, and report them to the superior competent department for approval according to the affiliation.
3 Reservoir operation parameters and basic information
3.1 The main parameters and indicators of reservoir dispatching and operation should include: normal water storage level of the reservoir, design flood level, verified flood level, flood season limit water level, dead water level and the corresponding reservoir storage capacity of the above water levels, installed capacity of hydropower stations, power generation, guaranteed output and corresponding guarantees rate, control discharge, etc.; reservoirs with flood control tasks should also include flood control high water level and flood control storage capacity, downstream flood control standards and safe discharge, and the phased start and end time of reserved flood control storage capacity during the flood season; reservoirs with irrigation and water supply tasks should also include the irrigation and water supply water volume and water level requirements specified in the design, as well as the corresponding guarantee rate and water distribution process; reservoirs with shipping and drifting wood tasks should also include various types of over-dam transportation volume and over-dam methods specified in the design, and meet the following 1) All designs involved in this specification refer to designs approved by the competent authorities with approval authority. 2) Reservoir dispatching and management units refer to units directly responsible for reservoir dispatching business and management. These units include hydropower plants, water conservancy hub management bureaus, reservoir management bureaus (departments), hydropower development limited liability companies, and relevant power dispatching agencies. The superior administrative department of the reservoir dispatching and management unit refers to the administrative leadership unit at the next higher level of the reservoir dispatching and management unit.
Approved by the State Administration of Quality and Technical Supervision on December 17, 1998 and implemented on April 1, 1999
The corresponding flow rate of the water depth requirement of the river channel, etc. GB17621—1998
These parameters and indicators are the basis for reservoir dispatching and should be explained in the annual dispatching and operation plan and program based on the design report and relevant agreement documents.
3.2 Basic data is the basis of reservoir dispatching and must be given full attention. Attention should be paid to the accumulation of data and supplement and revise it when necessary. The basic data mainly include:
3.2.1 Reservoir capacity curve: The original reservoir capacity curve should adopt the curve provided by the design. Reservoirs with serious sedimentation problems should regularly conduct reservoir sedimentation measurements and review the reservoir capacity curve according to the sedimentation situation. The new reservoir capacity curve should be reported to the superior administrative department for filing and approved when necessary. 3.2.2 Design flood: The approved design flood (including staged flood) results should be adopted. 3.2.3 Runoff data: The compiled results should be adopted. Including annual, monthly, ten-day, daily runoff series and their guaranteed rate curves, typical annual processes, etc. 3.2.4 Discharge curve: Including the discharge curves of various discharge structures. The model test curve is used in the initial operation of the reservoir. After accumulating enough measured data, on-site calibration should be carried out, and the results should be reported to the higher-level competent department for approval. 3.2.5 Hydro-generator unit characteristic curve: The data provided by the manufacturer or the results of on-site efficiency tests should be used. 3.2.6 Downstream water level-flow relationship curve: The on-site measured results should be used. 3.2.7 Head loss curve of the water diversion system: The data provided by the design or the on-site calibration results should be used. 3.2.8 Downstream river data: The composition and use conditions of the flood control system of the river embankment and the flood separation and detention areas downstream of the reservoir should be explained. 3.3 After the reservoir is completed and put into use, if the reservoir cannot be used according to the design requirements due to changes in hydrological conditions, engineering conditions and comprehensive utilization tasks, the superior competent department shall organize the operation management, design and other relevant units to review the reservoir operation parameters and indicators. Under normal circumstances, the review shall be conducted every 5 to 10 years. If the main parameters and indicators need to be changed, they shall be approved according to the original design approval procedures before implementation. 4 Hydrometeorological information and forecast
4.1 The reservoir dispatching management unit shall make full use of the existing hydrometeorological stations in the country and reasonably lay out the hydrometeorological information station network according to the requirements of forecast dispatching. The selection of stations shall take into account representativeness, controllability and transportation and communication conditions, and strive for stability. 4.2 The reservoir dispatching management unit shall observe and calculate the hydrometeorological elements related to the water balance of the reservoir, and the accuracy shall comply with the relevant national regulations.
4.3 The hydrometeorological station network managed by the national hydrometeorological department is the basic means for reservoir dispatching to obtain hydrometeorological information and should serve reservoir dispatching.
4.4 Communication is an important means to ensure reservoir operation and should be kept unimpeded. In addition to making full use of the existing communication facilities of the postal and telecommunications departments, a special flood reporting radio station should be set up when necessary.
4.5 The reservoir operation management unit and its superior competent department should build an automatic water situation measurement and water regulation automation system and strengthen operation and maintenance. 4.6 The reservoir operation management unit should carry out flood forecasting work, and the forecast scheme used should meet the requirements of the forecast specification and be approved by the superior competent department. The adopted forecast scheme should be continuously modified and improved according to the accumulation of measured data. When making operational forecasts, the forecast should be revised according to the short-term weather forecast and the development of the hydrological situation. In actual operation, the forecast results of the meteorological department should be collected, and if necessary, short-term weather forecasts should also be carried out.
4.7 The reservoir operation management unit should create conditions for medium- and long-term hydrological and meteorological forecasts, and collect the forecast results of the hydrological and meteorological departments. 4.8 When using forecasts, the forecast error should be fully taken into account and allowance should be left according to the purpose of the forecast. 5Flood control
5.1Tasks of reservoir flood control: Based on the design flood, verification flood and flood control standards of downstream protection objects determined by the design of the hub project, in accordance with the designed flood control principles, under the premise of ensuring the safety of the hub project, intercept and store flood water and control the downstream flow according to regulations, and try to reduce or avoid downstream flood disasters. 1) Reservoirs with a Kusha ratio of less than 100 are classified as reservoirs with serious sediment problems. Kusha ratio is the ratio of the reservoir volume corresponding to the normal water storage level of the reservoir to the annual sediment volume.
2) Hydrological conditions refer to hydrological and meteorological observation data, natural geographical conditions of the basin, water inflow, sediment inflow and reservoir siltation of the reservoir, etc. 128
5.2 Principles of flood control:
5.2.1 Dam safety first.
GB 17621-1998
5.2.2 Carry out flood control according to the goals and tasks determined by the design or the relevant documents of the superior. 5.2.3 In case of emergency in downstream embankments and flood distribution and detention areas, the flood control function of reservoirs should be fully utilized under the condition of water situation forecast and reliable key projects.
5.2.4 In case of super-standard floods, the downstream losses should be considered as much as possible when taking extraordinary measures to ensure the safety of dams. 5.3 Division of responsibilities for reservoir flood dispatching:
5.3.1 The flood control work of reservoirs should rely closely on the support and leadership of local governments. 5.3.2 For reservoirs that undertake downstream flood control tasks during the flood season, flood dispatching above the flood control limit water level during the flood season shall be directed and dispatched by the flood control command department with jurisdiction, and no other units and departments shall be involved. The dispatching of reservoirs below the flood control limit water level during the flood season shall be directed and dispatched by the reservoir dispatching management unit.
5.3.3 For reservoirs that do not undertake downstream flood control tasks, their flood dispatching during the flood season shall be directed and dispatched by the reservoir dispatching management unit. 5.3.4 For the hydropower projects under construction that have been put into use, the flood control should be mainly carried out by the project construction unit, and the flood control coordination leading group composed of the design, construction, reservoir control management and other units should be responsible for commanding and controlling. 5.4 The reservoir control management unit should formulate an annual flood control plan based on the designed flood control standards and reservoir flood control principles, combined with the actual situation of the hub project. Reservoirs that undertake downstream flood control tasks shall be reviewed by the superior competent department and reported to the flood control leading department with jurisdiction for approval; reservoirs that do not undertake downstream flood control tasks shall be reported to the superior competent department for review and approval, and filed with the relevant local people's government and river basin agencies.
The annual flood control plan mainly includes:
-Guiding ideology and main basis for plan preparation. In addition to the original design regulations, it should also explain the special circumstances existing in this year, such as engineering defects, construction requirements of downstream cascade power stations, problems existing in the reservoir area, etc. Overview of hub projects and reservoir operation principles. - Regulations on various flood control indicators.
-Flood control rules.
: Draw a reservoir flood dispatching diagram and attach a text description. According to the characteristics of different floods, specify the control conditions and propose corresponding dispatching measures.
5.5 For reservoirs that undertake downstream flood control tasks, a reservoir flood dispatching plan should be formulated based on the flood control capacity of the reservoir design and the importance of the protected objects, and clearly stipulate the judgment method for the reservoir to switch to the dam protection main dispatching mode when encountering a flood that exceeds the downstream flood control standard. Generally, one of the following three methods should be used for judgment:
-Reservoir water level judgment: the reservoir water level reaches the flood control high water level. One-person reservoir flow judgment: the flood flow of the reservoir reaches the downstream design flood control standard. One-reservoir water level and reservoir flow double judgment: the reservoir water level reaches the flood control high water level, and the reservoir flow reaches the downstream design flood control standard flood flow.
5.6 In order to avoid man-made disasters to the downstream, in principle, the reservoir discharge flow should not exceed the reservoir peak flow of this flood during flood control during the flood season.
5.7 In order to give full play to the comprehensive utilization benefits of reservoirs, if the flood entering the reservoir has obvious seasonal changes and the original design does not calculate the staged flood, the reservoir dispatching and management unit shall, together with the design unit, supplement the calculation and formulate the staged flood control limit water level, and submit it for approval according to the design procedure. 5.8 Reservoirs with qualified flood forecasting plans can adopt the following major flood forecasting and dispatching methods. When using the results of flood forecasting, the forecast error should be fully considered and left room. 5.8.1 Pre-discharge dispatching: Before the flood enters the reservoir, the flood forecast can be used to increase the reservoir discharge in advance (the maximum shall not exceed the safe discharge of the downstream river channel) to free up part of the storage capacity for later flood control. 5.8.2 Compensation and peak-shifting dispatching: Under the premise of ensuring the safety of the hub project, the front-shifting or rear-shifting method can be adopted. The control conditions for the peak-shifting start and end should be clearly specified.
GB 17621—1998
5.8.3 Real-time forecast dispatch: According to the forecast flood, the reservoir water level at that time and the conditions for determining the controlled discharge at each level, the magnitude of the reservoir discharge flow is determined and the reservoir forecast dispatch is implemented. 5.9 The reservoir dispatch management unit shall determine the number and opening of the gates according to the approved flood discharge flow. Operate the gates according to the prescribed procedures and inform the relevant units of the information.
5.10 When the flood peak has passed and the highest reservoir water level has appeared, the reservoir should be emptied as soon as possible without affecting the flood control safety of the upstream and downstream, so as to prepare for the next flood to reduce the reservoir water level to the flood control limit water level during the flood season. The speed of the reservoir water level drop must comply with the design regulations. 5.11 The timing of water storage at the end of the flood season is related to the flood control safety of the reservoir and affects the reservoir storage rate. It should be determined according to the design regulations and with reference to the hydrological and meteorological laws of previous years and the water situation of the year. If water is required in advance, it should be approved by the relevant departments. 5.12 The reservoir dispatching and management unit shall formulate an emergency dispatching plan for floods exceeding the check mark and submit it to the superior competent department for approval. The emergency dispatching plan shall include:
Simulation of floods exceeding the check mark.
——-Dispatching principles and dispatching methods for floods exceeding the check mark. Formulate the discharge flow.
——-Measures for emergency flood prevention and rescue in cooperation with hub projects. -Measures for emergency flood prevention and rescue in cooperation with living areas. 5.13 Reservoirs in the same flood control system shall formulate a joint flood dispatching and utilization plan based on the flood compensation and regulation methods specified in the design, and implement unified dispatching of the reservoir group.
5.14 Reservoirs with serious sediment problems shall adopt a dispatching method that combines water and sediment regulation. According to the specific conditions of each reservoir and the law of sediment movement, research and analyze the adoption of appropriate sediment dispatching methods, such as "different density flow" sediment discharge, "storing clear water and discharging turbid water", emptying and concentrated sediment flushing, bottom hole sediment discharge and graded flow sediment discharge, etc., to minimize reservoir siltation and wear on turbines. 5.15 Reservoirs in the north with ice prevention tasks should carefully analyze the ice situation, formulate a scheduling plan for reservoir storage and discharge during the ice flood period according to the law of floods during the ice flood period and the requirements of ice prevention in downstream rivers, and provide conditions for ensuring the safety of ice prevention in downstream rivers. 6 Power generation and other beneficial scheduling
6.1 Tasks of reservoir beneficial scheduling: According to the development goals, parameters, indicators and the primary and secondary relationships and requirements between the beneficial departments of the hub project design, reasonably allocate water and give full play to the beneficial benefits of the reservoir. 6.2 Principles of beneficial scheduling
6.2.1 Ensure the safety of the hub project and meet the safety requirements of other protection objects as required. 6.2.2 Adhere to the principles of planned water use, water conservation and multiple uses of water. 6.2.3 When there are conflicts in the water use requirements of various comprehensive utilization departments, the principles of ensuring key points, taking into account other aspects, full consultation and overall interests should be adhered to.
6.2.4 The comprehensive utilization tasks specified in the design must be avoided, and the water supply tasks and scope shall not be arbitrarily expanded or reduced. Water diversion within the reservoir should be included in the unified allocation and dispatch of the reservoir water volume4.
6.2.5 All hydropower stations connected to the power grid should give full play to their peak regulation, frequency regulation and emergency standby functions in the operation of the power grid, under the premise of ensuring the control of water level and water storage in each period. 1) Early water diversion refers to the start of water storage before the flood season at the end of the flood season as stipulated in the annual flood dispatching plan of the reservoir. 2) Combining water and sediment diversion means that the selection of the reservoir sediment discharge time and flow rate should be combined with the reservoir water supply situation and the requirements of various comprehensive utilization departments. For example, during flood control in the middle of the flood season, there may be water abandonment and more water at the end of the flood season. If power generation is allowed, it can be arranged to discharge and concentrate sand flushing; for example, the sediment discharge time of "abnormal density flow" is naturally formed, but the outflow flow depends on the downstream sand control and water use situation. 3) "Key points" refers to the key development goals in the design or the primary benefit goals that must be guaranteed at different times during the abnormal period of reservoir operation. 4) Water diversion from reservoirs reduces the amount of water available for distribution in reservoirs and affects other comprehensive utilization tasks. Therefore, it should be included in the water distribution plan to achieve unified distribution and unified dispatching.
GB 17621—1998
6.3 Prepare and submit a water dispatching plan, which includes: - Forecast and formulate the water inflow process during the planning period. - Coordinate the requirements of water users for reservoir water supply. - Formulate reservoir utilization indicators during the control period during the planning period. - Formulate a dispatching plan.
Formulate measures to implement the dispatching plan.
6.4 Reservoirs that are mainly used for power generation and have other tasks such as irrigation, water supply, and navigation should first meet the power generation task according to the design regulations, while taking into account irrigation, water supply, and navigation.
6.5 The annual power generation plan is generally prepared with a guaranteed water rate of 70%~75%, and other typical frequency water is used to calculate the power generation for reference when balancing power and electricity. The power generation plan for the time period (daily, monthly, seasonal, etc.) should be prepared on the basis of the previous power generation plan, with reference to the hydrological and meteorological forecasts and power grid conditions for the corresponding time period. In case of special circumstances, the plan should be modified in time. The compiled power generation plan should be submitted to the relevant departments in a timely manner. 6.6 For reservoirs with regulation capabilities, a reservoir dispatching diagram should be drawn according to the development goals, parameters and indicators determined by the design. The reservoir dispatching diagram should include guaranteed water supply (output) areas, increased water supply (output) areas, reduced water supply (output) areas, etc., and indicate the water volume (output) value of each area and the flood season limit water level line. For existing reservoirs that lack a reservoir dispatching diagram, the reservoir dispatching management unit shall draw it together with the design unit and submit it for approval according to the design procedure. In actual use, it should be noted that:
6.6.1 The reservoir operation mode shall be determined according to the position of the reservoir water level on the reservoir dispatching diagram, and water use shall not exceed the plan and regulations. 6.6.2 Under normal water storage conditions, the reservoir water level at the end of the annual water supply period of a multi-year regulation reservoir shall be controlled not lower than the annual drawdown level. Only when encountering a dry year with a rate greater than the design guarantee, is it allowed to use the multi-year regulation reservoir capacity; when encountering a dry period with a rate greater than the design guarantee, is it allowed to drop to the dead water level.
6.6.3 In the operation of the hydropower station reservoir, except for special circumstances, the minimum operating water level shall not be lower than the dead water level. When encountering a dry year and the reservoir water level is in the restricted water supply (output) area, the water use plan shall be adjusted and reduced after approval by the superior. 6.7 For reservoirs with regulation capacity, the method of combining the design reservoir dispatching diagram with hydrological forecast shall be used for dispatching. Note: The reservoir dispatching diagram is compiled with historical data. In actual dispatching, due to the non-repetitive and random nature of runoff, rolling dispatching should be carried out in combination with short- and medium-term hydrological forecasts to determine the reasonable use of the reservoir. If the water supply (output) of the facing period indicated by the dispatching diagram is guaranteed according to the initial water level of the period, and the forecast is that the water inflow in the facing period is abundant, the reservoir can appropriately increase the water supply (output) in advance. 6.7.1 Make full use of hydrological and meteorological forecasts to gradually revise and optimize the reservoir dispatching plan. 6.7.2 Reservoirs with poor regulation capacity should make full use of short-term hydrological and meteorological forecasts and take measures to increase water supply and intercept flood tail in advance within the permitted range to improve the benefits. bzxZ.net
6.8 For daily regulation and non-regulation reservoirs, special attention should be paid to short-term hydrological forecasts, and corresponding daily operation plans should be prepared. The reservoir water level should be maintained at a higher position as much as possible.
6.9 Actively take the following measures to create conditions for water conservation and increased power generation: 6.9.1 Strengthen the management of reservoirs and hub projects to reduce water loss in reservoirs. 6.9.2 Strengthen the maintenance and overhaul management of electromechanical equipment to ensure the normal operation of equipment. 6.9.3 Carry out economic operation within the plant, optimize the startup mode and load distribution, and keep the unit operating in the high-efficiency output area. 6.9.4 Timely discharge and clean up the floating dirt to reduce the head loss. 6.9.5 Carry out tailwater slag cleaning work to improve the operating head. 6.9.6 Minimize the no-load loss of the unit.
6.10 The power grid should reasonably arrange the operation mode according to the characteristics of the hydropower station, combined with the hydrological forecast and load prediction results. When a reservoir abandons water or is likely to abandon water, thermal power should be arranged as much as possible to adjust the peak, increase off-peak electricity consumption, and improve the load rate of hydropower generation, so that hydropower stations (especially those with poor regulation performance) can avoid unnecessary abandonment of water and excessive power generation to save fuel resources. 1) Special circumstances refer to the situation in which the actual water inflow of the reservoir deviates greatly from the estimated water inflow adopted during the implementation of the reservoir plan or other factors affect the planned power generation of the reservoir.
GB17621—1998
6.11 The cascade reservoir group should be designed according to the requirements of the best comprehensive utilization benefit of the whole cascade, and the dispatching rules and dispatching diagrams of the cascade reservoir group should be formulated according to the location and characteristics of each reservoir. During implementation, the order of water storage and release of each reservoir should be correctly grasped, and the operation of each reservoir should be coordinated. 6.12 Reservoir groups in the same power grid should make full use of the differences in reservoir characteristics and hydrological conditions, carry out compensation and regulation of the reservoir group, and give full play to the benefits of the reservoir group.
6.13 Reservoir dispatching and management units and their superior departments should conscientiously carry out assessment work on water-saving and power generation increase of hydropower stations to improve the utilization rate of water energy.
6.14 Reservoirs that are mainly used for irrigation and have other tasks such as power generation, water supply, and navigation should first meet the irrigation task according to the design regulations, and take into account power generation, water supply, and navigation. When formulating water supply plans and actual dispatching, attention should be paid to: Reasonably arrange irrigation water use methods to reduce water supply peaks. Make full use of water storage projects in irrigation areas. Recharge in advance during non-irrigation periods or non-peak water use periods. During peak water use periods, water storage projects in irrigation areas can supply water together with reservoirs. 6.15 Reservoirs that are mainly used for water supply and have other tasks such as irrigation, power generation, and navigation should first meet the industrial and urban domestic water use tasks according to the design regulations, and take into account irrigation, power generation, and navigation. 6.16 Reservoirs that are mainly used for navigation and have other tasks such as power generation, irrigation, and water supply should first meet the navigation task according to the design regulations, and take into account power generation, irrigation, and water supply.
7 Management of the reservoir area and downstream river
7.1 No unit or individual has the right to privately develop and utilize the water surface and reservoir bank below the reservoir resettlement line or land acquisition line. The reservoir dispatching and management unit shall not bear any responsibility for the development and utilization projects that suffer losses due to the storage and release of water by the reservoir without the consent of the reservoir dispatching and management unit. 7.2 The boundary stakes (cement stakes or rock carvings) buried along the reservoir resettlement line or land acquisition line, the hydrological and meteorological monitoring and information facilities and reservoir area measurement signs set up in the reservoir catchment area are all permanent protection facilities. No unit or individual may change, move, encroach on or destroy them. 7.3 Soil and water conservation should be strengthened in the reservoir catchment area. It is strictly prohibited to cut down trees indiscriminately, open up steep land, and other activities that lead to soil erosion and aggravate the sedimentation of the reservoir.
7.4 It is strictly prohibited to discharge sewage into the reservoir. If it causes pollution, it should be handled in accordance with the Environmental Protection Law. Relevant departments should strengthen the management of the piled materials around the reservoir to prevent floods from rushing into the reservoir and affecting the operation of the reservoir. 7.5 The water surface and the shore within 300m upstream and downstream of the dam axis are the management restricted areas of the reservoir dispatching and management unit (special circumstances are determined separately). No unit or individual shall engage in any activities that endanger the hub project, such as stacking goods, blasting aquatic organisms, reclaiming land for planting, and mining sand and gravel in the management restricted areas. Except for normal routes and ships operated by the reservoir dispatching and management unit, other ships shall not enter or stop. 7.6 The river channel downstream of the reservoir shall maintain the water-passing capacity specified in the design, and no obstacles shall be set up to block floods. The reservoir dispatching and management unit shall not bear any responsibility for the destruction of water-blocking obstacles due to the discharge of floods according to the flood dispatching plan. 8 Reservoir dispatching and management
8.1 The reservoir dispatching and management unit shall compile the reservoir dispatching regulations and continuously revise and improve them. The main contents include: - Basic tasks specified in the design, comprehensive utilization requirements, dispatching and application principles and relevant dispatching agreements. Reservoir design and application parameters and indicators.
--Hydrological and meteorological information forecast.
Flood control.
Power generation and other beneficial control.
…Regulations on reservoir control orders and the use of water discharge facilities. ——Rules and regulations for reservoir control.
8.2 The flood control plan prepared by the reservoir control management unit is generally required to be submitted for approval by the end of March for southern reservoirs and by the end of May for northern reservoirs; the formulated beneficial control plan is generally required to be submitted for approval by the end of November of the previous year, and the water supply period plan is not submitted for approval during the water storage period, and the monthly plan is submitted for approval before the 25th of the previous month.
8.3 The water regime automatic monitoring and reporting system and water regulation automation system that have been built and put into operation should formulate operation and management rules, strengthen equipment maintenance and overhaul, and ensure long-term reliable operation of the system.
8.4 Establish a monthly report system for reservoir dispatching. The main contents include: actual statistics and brief analysis of rain, water, sand and ice conditions in the basin. Analysis of dispatching and operation.
Next month's forecast dispatching plan and implementation measures. 8.5 Establish a reservoir dispatching duty system. The main responsibilities of the duty personnel are: 8.5.1 Receive and send water condition telegrams, and keep abreast of rain, water, sand, ice conditions and reservoir operation conditions. 8.5.2 Make good hydrological forecasts, keep abreast of flood control, water storage and water use conditions, perform reservoir storage calculations, and put forward dispatching opinions. 8.5.3 Contact relevant units and report to relevant leaders in a timely manner according to regulations, and issue dispatching orders according to authorization. 8.5.4 Make good water balance calculations and dispatching and operation data statistics. 8.5.5 Make good dispatching duty records and handover work. 8.6 Establish a technical archive system for reservoir dispatching and operation. Rain, water, sand, and ice data should be compiled and archived in a timely manner, comprehensive utilization data, short-, medium-, and long-term forecast results, dispatch plans and calculation results, and other important dispatch application data and documents, etc. 8.7. Make a good summary of reservoir dispatching work. Prepare a summary of flood dispatching, a summary of beneficial dispatching and a summary of relevant special technologies at the end of the flood season and the end of the year. The summary report should be submitted to the superior competent department for record. The main contents of the summary should include: analysis of rain, water, sand and ice conditions.
Main dispatching and application process.
Evaluation of the error of hydrological and meteorological forecast results.
Comparison of actual reservoir application indicators with planned indicators. Evaluation of water-saving and increased power generation.
Comprehensive utilization benefit analysis.
Existing problems and corresponding improvement suggestions.
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