【JD-YJ2】， Shandong Jingdao Optoelectronics, customer-centric and quality-oriented, work together for a win-win future.

In reservoir management, rainfall and water level are two key parameters. The monitoring of rainfall and water level in reservoirs provides scientific support for flood control decisions by linking these two parameters, which is of great significance for ensuring the safe operation of reservoirs and protecting the safety of people's lives and property in downstream areas.

Dual parameter linkage monitoring: comprehensive and accurate grasp of reservoir dynamics

The reservoir rainfall and water level monitoring system is equipped with high-precision rainfall monitoring equipment and water level monitoring equipment, achieving synchronous and accurate monitoring of rainfall and water level, and realizing dual parameter linkage through data correlation analysis.

Rainfall monitoring equipment usually uses tipping bucket rain sensors, weighing rain sensors, etc. The tipping bucket rain sensor measures rainfall by the number of flips of the tipping bucket. When it rains, rainwater falls into the tipping bucket. When the amount of rainwater in the tipping bucket reaches a certain level, the tipping bucket flips. By recording the number of flips of the tipping bucket and combining it with its capacity, the rainfall can be accurately calculated. This type of sensor has a fast response speed and can capture real-time changes in rainfall intensity. Weighing rain sensors convert rainfall by measuring the weight of precipitation, providing more accurate measurement results for solid precipitation (such as snow) and situations with significant changes in precipitation intensity.

Common water level monitoring devices include pressure type water level sensors, ultrasonic water level sensors, etc. The pressure type water level sensor calculates the water level height by measuring the water pressure based on the relationship between water pressure and water level. It has high stability and can adapt to reservoir environments at different depths, accurately measuring small changes in water level. Ultrasonic water level sensors use the principle of ultrasonic reflection to emit ultrasonic pulses to the water surface and receive reflected waves. Based on the time difference between transmission and reception, as well as the propagation speed of ultrasonic waves in the air, the water level height is accurately calculated. This sensor is not affected by factors such as water impurities and floating objects, and measures quickly and accurately.

Dual parameter linkage monitoring is not only a separate measurement of rainfall and water level, but more importantly, it involves analyzing the correlation between the two data through a data processing system. For example, during the rainfall process, the system compares the real-time changes in rainfall amount and water level. When rainfall increases, observe the speed and magnitude of water level rise and analyze the relationship between the two. Through long-term data accumulation and analysis, a model of rainfall and water level changes in the reservoir can be established. This model can help staff more accurately predict the trend of water level changes under different rainfall conditions, thus comprehensively and accurately grasping the dynamic changes of the reservoir.

Scientific support for flood control decision-making: ensuring the safety of reservoirs and downstream areas

The dual parameter linkage monitoring data provided by reservoir rainfall and water level monitoring provides solid scientific support for flood control decision-making.

In terms of flood prevention warning, real-time monitoring and linkage analysis of rainfall and water level can timely and accurately issue flood prevention warnings. When the rainfall reaches a certain value and the water level begins to rise rapidly, the system determines whether floods and other disasters may occur based on pre-set thresholds and models, and promptly sends warning signals to the reservoir management department, downstream area ZF, and relevant departments. Early warning information includes rainfall, water level status, expected change trends, and potential risks, enabling relevant departments to prepare for flood prevention in advance, such as organizing personnel evacuation and allocating flood prevention materials.

In terms of reservoir scheduling decisions, rainfall and water level linkage monitoring data is an important basis for scientific reservoir scheduling. The reservoir management department formulates a reasonable reservoir scheduling plan based on real-time rainfall and water level data, combined with factors such as reservoir capacity and flood discharge capacity. For example, when the rainfall continues to increase and the water level approaches the warning level, according to the trend of rainfall and water level changes, the flood discharge gate should be opened reasonably to control the flood discharge flow, ensuring the safety of the reservoir itself and avoiding excessive flood threats to downstream. Through scientific reservoir scheduling, the impact of flood disasters can be effectively reduced, ensuring the safety of people's lives and property in downstream areas and the stable development of society.

At the same time, long-term monitoring and analysis of rainfall and water level data can help evaluate the flood control capacity of reservoirs and the effectiveness of flood control plans. By analyzing historical data, problems and weak links in the flood prevention process of reservoirs can be identified, providing scientific basis for further improving flood prevention facilities and optimizing flood prevention plans. For example, by analyzing the changes in water level under the same rainfall in different years, the impact of reservoir sedimentation on water level changes can be determined, and corresponding dredging measures can be taken to improve the flood control capacity of the reservoir.

The monitoring of rainfall and water level in reservoirs provides comprehensive and scientific support for flood control decision-making through dual parameter linkage monitoring. It is an important means to ensure the safe operation of reservoirs and protect downstream areas from flood threats. With the continuous advancement of technology, the reservoir rainfall and water level monitoring system will become more intelligent and accurate, providing stronger support for flood prevention work and playing a greater role in ensuring the rational use of water resources and sustainable socio-economic development.