Zhanghe Irrigation District, Hubei Province

Project Background

With the rapid development of the social economy and the growth of population, the contradiction between water resource shortage and irrigation demand has become increasingly prominent. The traditional irrigation district management model has been unable to meet the requirements of modern agricultural development. The modernization reform of irrigation districts aims to enhance the efficiency of water resource utilization, optimize the management of irrigation districts, and improve the level of irrigation services. The construction of demonstration zones for consolidating achievements will help summarize and promote the reform experience, further advancing the modernization process of irrigation districts across the country.

Current situation and problems

Water resources monitoring and management: Some irrigation districts lack precise water condition monitoring equipment, making it difficult to grasp the distribution and changes of water resources in real time. This leads to unreasonable water resource allocation, resulting in waste or insufficient water supply.

Irrigation engineering facilities: In some irrigation areas, the canal systems, gates and other engineering facilities are aging and in disrepair, with a low degree of automation control, low irrigation efficiency, and great difficulty in maintenance and management.

 

Informationization construction: The informationization level of most irrigation districts is relatively low, lacking effective data collection, transmission and management platforms. As a result, managers find it difficult to obtain operational information of the irrigation districts in a timely manner, which affects the scientificity and timeliness of decision-making.

Organizational management and operation: In some irrigation districts, the functions of management institutions are not clear, the management system is rigid, and the operation mechanism is not flexible. As a result, farmers' enthusiasm for participating in irrigation management is not high, which has affected the sustainable development of the irrigation districts.

Solution approach

Strengthen the construction of the monitoring system: By installing advanced hydrological, meteorological, soil moisture and other monitoring equipment, real-time and accurate monitoring of water resources information in irrigation districts can be achieved, providing data support for scientific dispatching and efficient utilization of water resources.

Upgrade engineering facilities and equipment: Carry out automation renovations on engineering facilities such as channels, gates, and pumping stations in the irrigation area to enhance the operational efficiency and reliability of irrigation projects, and achieve remote monitoring and precise control.

Promote information-based management: Establish a unified information management platform for irrigation districts, integrating data collection, transmission, storage, analysis and decision support, to achieve digitalization, intelligence and visualization of irrigation district management.

Innovate management systems and mechanisms: Clarify management responsibilities, optimize management processes, introduce market-oriented mechanisms, encourage farmers to participate in irrigation management, enhance the efficiency and effectiveness of irrigation district management, and promote the sustainable development of irrigation districts.

Hardware perception system

Hydro-meteorological monitoring equipment: Reasonably set up automatic rainfall stations, water level stations, meteorological stations, flow stations, etc. in the irrigation area to monitor meteorological and hydrological elements such as rainfall, water level, temperature, humidity, wind speed and evaporation in real time, providing a basis for irrigation dispatching.

Soil moisture monitoring equipment: Set up soil moisture monitoring points in different plots and crop planting areas, install soil moisture sensors, collect soil moisture content information at regular intervals, grasp the dynamics of soil moisture conditions, and facilitate precise irrigation.

Image and video surveillance equipment: Install network high-definition cameras and other video surveillance equipment at important channels, hubs, buildings, etc., to achieve real-time visual monitoring of the operation status of engineering facilities, water flow conditions, etc., and promptly identify problems and take measures.

Gate automatic control system: Equipped with gate position gauges, flow measurement devices, remote control terminals (Rtus) and other equipment on various types of gates, it realizes remote opening and closing control of gates, gate position monitoring and automatic flow regulation, improving the refined management level of irrigation water.

Pumping station automation monitoring system: It involves the automation transformation of the motors, water pumps, and power distribution equipment in the pumping station, installing sensors, monitoring instruments, and control devices to achieve remote monitoring, fault diagnosis, and automatic control of the pumping station, ensuring its safe and efficient operation.

Equipment selection

Doppler ultrasonic flowmeter - Small channel flow measurement

Doppler ultrasonic flowmeter: The Doppler ultrasonic flowmeter independently developed and designed by Wuhan Shuicejia Technology is compact in size. It measures the water level, flow velocity and flow rate of water bodies in a contact manner based on the Doppler effect. The integrated design enables efficient data perception and collection.

Technical parameters

Power supply range: DC12V /24V (limit: DC6-28V). It is recommended to use DC12V

Operating current: <45mA@DC12V25℃

Operating temperature: 0℃ to 60℃

Storage temperature: -40℃ to 85℃

Flow velocity range: 0-12m/s(Adjustable range: 0-4m/s;0-6m/s;0-8m/s;0-12m/s)

Flow velocity accuracy: 1%(accuracy within 1 meter: 1cm/s)

Flow velocity resolution: 1mm/s

Water depth range: 0-10m

Water depth accuracy: ±0.5%

Water depth resolution: 1mm

Water temperature range: 0℃ to 60℃

Water temperature accuracy: ±0.5℃

Waterproof rating: IP68

Operating power consumption: <0.5W@DC12V

Power protection: Reverse connection protection, static discharge protection

Maximum operating temperature: -30℃ to 70℃

Communication interface: RS485 interface (baud rate 9600,8,N,1), effective transmission distance 1000m(>300m requires an external 150Ω matching resistor)

Communication protocol: Standard Modbus-RTU protocol, function code

Compensation methods: Sound velocity compensation, user parameter compensation

Ultrasonic frequency: 1MHz±30Hz

2. Radar flowmeter - Wide channel natural channel flow measurement

The SCJ-LL21 radar flowmeter is an integrated flow measurement product that combines radar speed measurement and radar water level measurement. It measures the flow velocity of water bodies by utilizing the Doppler effect of electromagnetic waves and water level by using frequency modulated continuous wave (FMCW) technology. It is equipped with an internal integrated signal processor and a proprietary flow velocity calculation algorithm, which can quickly and accurately calculate the flow velocity and water level of water bodies. Moreover, no calibration is required and there is no drift.

3. Radar water level gauge: Online monitoring of water levels in river channels

The SCJ-LD07 radar water level gauge is a device that uses microwave radar technology to achieve precise non-contact water level measurement. It is compact, lightweight and easy to install, and can be used for non-contact liquid level measurement in rivers, open channels, reservoirs, sewage networks, water tanks, etc.

The radar water level gauge adopts PCR planar microstrip pulse coherent technology to achieve rapid and high-precision water level measurement. The product features high measurement accuracy, low power consumption, small size, light weight, strong resistance to environmental interference, and excellent reliability and maintainability. All-weather operation, suitable for unmonitored situations in the wild or mountainous areas, capable of automatically measuring and calculating data, with high stability, long service life and maintenance-free. Adopting the principle of microwave reflection, it has strong anti-interference ability, and the measurement data can reach the millimeter level. It is not affected by factors such as weather, air pressure, and region, and can operate in various complex on-site environments. Even after changing scenes, it can adapt to different environments at any time.

Telemetry terminal: Data acquisition, computing, storage and transmission

 

The SCJ-RTU01 telemetry terminal is a low-power Internet of Things data acquisition terminal integrating a 4GDTU, equipped with a 2.8-inch TFTLCD display. It supports the collection and transmission of flow, water level, water quality and meteorological data. It is equipped with a large-capacity SD card, which can meet the data storage needs for three years. At the same time, it supports remote configuration and upgrade functions, reducing the difficulty of installation and use for customers.