3. 1. 1 meteorological, hydrological and marine information

Meteorological, hydrological and marine departments at all levels should organize joint monitoring, consultation and forecast of major floods and droughts, extend the forecast period as much as possible, make an assessment of major floods and droughts, and report to the people's government at the same level and the flood control and drought relief headquarters in a timely manner.

3. 1.2 engineering information

(1) river engineering information

When a flood above the warning water level occurs on the main spillway, the local water administrative department shall organize dike management units and relevant personnel to strengthen engineering monitoring, and report the operation of dikes, sluice culverts, pumping stations and other engineering facilities to the superior engineering management department and the flood control and drought relief headquarters at the same level.

When dikes, sluice culverts, pumping stations and other buildings crossing dikes are in danger or are attacked by over-standard floods, and other irresistible factors may burst, the local water administrative department should quickly organize emergency rescue, give early warning to the relevant areas that may be flooded at the first time, and accurately report the dangerous parts, dangerous types, emergency protection plans, administrative responsible persons and technical responsible persons, and inform the superior and the flood control and drought relief headquarters at the same level of communication methods and danger elimination, so as to strengthen guidance and decision-making.

(2) Reservoir engineering information

When the water level of the reservoir exceeds the flood limit level, it shall report the operation of the project to the water administrative department at the next higher level and the flood control and drought relief headquarters at the same level when dispatching according to the flood dispatching plan approved by the flood control and drought relief headquarters.

When the reservoir is in danger, the reservoir management unit should issue an early warning to the downstream at the first time to deal with the danger quickly. At the same time, the location, type, emergency support scheme, administrative responsible person, technical responsible person, communication mode and danger elimination should be reported to the higher level and the flood control and drought relief headquarters at the same level, so as to take further corresponding measures.

When the reservoir may burst due to excessive flood or other irresistible factors, the corresponding flood control and drought relief headquarters should immediately issue an early warning to the flooded area determined by the flood risk map according to the dispatching authority, so as to win time for the safe transfer of the masses.

3. 1.3 flood disaster information

The flood disaster information mainly includes: the time, place and scope of the disaster, the affected population and people's property losses, agriculture, forestry, animal husbandry and fishery, transportation, post and telecommunications, hydropower facilities, etc.

After the occurrence of flood and drought disasters, relevant departments should collect dynamic disasters in time, pay close attention to verification, fully grasp the disaster situation, and report to the government at the same level and the flood control and drought relief headquarters at a higher level in time. Casualties and heavy property losses should be reported immediately.

3. 1.4 Drought information

Drought information mainly includes: time, place, degree, affected area, affected population, and its impact on industrial and agricultural production, urban and rural life and ecological environment.

3.2 Prevention and early warning actions

3.2. 1 Prevention and early warning preparation

(1) psychological preparation. Strengthen propaganda, overcome paralysis, luck and lax mood, enhance people's awareness of flood control and drought relief and self-protection, and make ideological preparations for flood control and drought relief.

(2) organizational preparation. Establish and improve the flood control and drought relief headquarters, implement the monitoring network and early warning measures for those responsible for flood control and drought relief, flood control and drought relief teams and key areas prone to mountain torrents, and strengthen the construction of professional mobile rescue teams for flood control and drought relief service organizations. Take the principle of graded responsibility, organized by flood control and drought relief headquarters at all levels, and train the heads of flood control and drought relief headquarters, flood control technicians and the backbone of flood control mobile rescue teams. Organize necessary flood control drills to improve the ability of rapid response and actual rescue.

(3) Engineering preparation. Complete the task of water damage project repair and water source project construction on time, and implement emergency reinforcement for water conservancy facilities such as dikes, reservoirs, culverts and pumping stations in danger; In large and medium-sized cities, water transmission and drainage pipelines, traffic intersections and drainage ditches crossing flood control dams shall be closed in time; For water conservancy projects and dangerous projects that are constructed across the flood season, it is necessary to implement a safe flood season plan; Non-flood control construction projects that have not prepared flood impact assessment reports and have not been approved by the water administrative department and seriously affected flood control should be forcibly removed according to law. Do a good job in river dredging and sand mining supervision according to law; Maintenance, overhaul and trial operation of standby power supply, standby communication facilities and gate opening and closing equipment to ensure safe operation.

(4) Plan preparation. Revise and improve all kinds of water conservancy projects and urban flood control plans, typhoon and storm surge prevention plans, flood forecasting and dispatching plans, personnel safety transfer plans in flood storage and detention areas, mountain flood prevention plans and drought relief plans, and urban emergency water supply plans.

(5) Material preparation. According to the principle of graded responsibility, reserve necessary flood control equipment, vehicles, equipment and materials. Reserve a certain amount of emergency materials in key flood control areas for emergencies.

(6) communication preparation. Make full use of public social communication networks to ensure the integrity and smoothness of special flood control communication networks and early warning feedback systems in flood storage and detention areas. Improve the hydrometeorological forecast network to ensure timely transmission of rain, water, work and disaster information and command and dispatch instructions.

(7) Flood control and drought relief inspection. Establish and improve the grading inspection system with the inspection of organization, project, plan, data and communication as the main content, and implement the method of combining self-inspection of management unit, verification by competent department and random inspection by superior leaders. According to the requirements of the flood control inspection manual, do a good job of inspection, find the weak links, clarify the responsibilities, and rectify within a time limit.

River flood warning

When the main spillway is about to flood, hydrological departments at all levels should do a good job in flood forecasting, and report the measured situation of water level and discharge and flood trend to the flood control and drought relief headquarters and relevant departments in time to provide a basis for early warning. If it is necessary to inform the upstream and downstream water conditions, it shall be implemented in accordance with the standardized procedures of the hydrological department.

3.2.3 Early warning of waterlogging disaster

When the weather forecast is that there will be heavy rainfall, the flood control and drought relief headquarters should determine the early warning area and grade of waterlogging disaster according to the principle of grading responsibility, and release it to the society according to the authority, so as to make good preparations for self-protection of waterlogging and drainage. When necessary, notify residents and enterprises and institutions in low-lying areas to transfer personnel and property in time.

3.2.4 Flash Flood Warning

Any place that may be threatened by mountain torrents should take the initiative to take preventive and hedging measures according to the causes and characteristics of mountain torrents. Land, resources, meteorology and other departments should closely contact and cooperate with each other to realize information sharing, improve the level of forecasting, and timely issue forecasting and early warning. Where there are mountain torrents, the flood control and drought relief headquarters shall organize the departments of land and resources, water conservancy, meteorology, etc. to prepare the prevention plan of mountain torrents, draw the risk map of mountain torrents in the region, divide and determine the location and scope of mountain torrents in the region, formulate the safety transfer plan, and clarify the institutional setup and responsibilities.

3.2.5 Storm Surge Disaster Early Warning

Meteorological departments at all levels should closely monitor the trend of typhoons, do a good job in forecasting future trends, and report the information such as the center position, intensity, moving direction and speed of typhoons (including tropical storms and tropical depression) to the people's government at the same level and the flood control and drought relief headquarters in a timely manner. For places that may be hit by typhoons, flood control and drought relief headquarters at all levels should strengthen their duty, track the trend of typhoons and release relevant information to the society in a timely manner. In coastal areas expected to be affected by typhoons, the local flood control and drought relief headquarters shall promptly notify relevant departments and personnel to do a good job in typhoon prevention.

3.2.6 Early warning of flood storage and detention areas

The local government in flood storage and detention areas shall draw up a plan for the safe transfer of personnel, which shall be organized and implemented by the flood control and drought relief headquarters with the power of examination and approval. When the flood storage and detention area is opened, the local people's government and the flood control and drought relief headquarters should quickly start the early warning system and implement the safe transfer according to the personnel safety transfer plan.

3.2.7 Drought disaster early warning

Flood control and drought relief headquarters at all levels should take early warning and preventive measures according to the causes and characteristics of drought disasters. Establish and improve the drought monitoring network, grasp the real-time drought, predict the development trend of drought, and put forward corresponding countermeasures according to different drought levels.

3.2.8 Early warning of water supply crisis

When a water supply crisis occurs due to shortage or destruction of water supply sources, interruption of water supply lines, violation of water supply quality, etc. The relevant departments and units should report to the local government and the flood control and drought relief headquarters in a timely manner, and the local flood control and drought relief headquarters or the leading institutions of relevant departments will announce the early warning to the public, and residents, enterprises and institutions should make emergency water supply preparations, and relevant departments should make emergency water supply preparations.

3.3 Early Warning Support System

3.3. 1 drought and flood risk map

Flood control and drought relief headquarters at all levels should organize engineers and technicians to draw flood risk maps and drought risk maps of large and medium-sized reservoirs, main flood channels and key flood storage and detention areas in the region, as the technical basis for flood fighting, emergency rescue and disaster relief, safe transfer and resettlement of personnel and drought relief decision-making.

Flood control scheme

The flood control and drought relief headquarters shall, according to the needs, compile, modify and improve the flood control scheme and flood dispatching scheme, and report them to the examination and approval level by level according to the regulations. The flood control plans and dispatching plans approved by the people's government or the flood control and drought relief headquarters shall be implemented by the relevant regions and departments.

3.3.3 Drought Relief Plan

The flood control and drought relief headquarters shall prepare a drought relief plan, which shall be examined and approved by the local people's government or the flood control and drought relief headquarters and reported to the flood control and drought relief headquarters at the next higher level for the record. After the drought relief plan is approved, the relevant regions and departments shall implement it.