River Flow Monitoring

1.River Flow Monitoring Product Overview

River Flow Monitoring is a fully automatic hydrological online monitoring system based on microwave technology, which can simultaneously measure the water level, velocity, flow and rainfall in the channel. It uses advanced K-band planar radar technology to measure the velocity and water level of the water body in a non-contact manner, and calculates and outputs the real-time cross-sectional flow and cumulative flow according to the built-in software algorithm; it can be used for non-contact flow measurement in rivers, irrigation canals, underground drainage networks, flood prevention and early warning, etc.; the product has the characteristics of low power consumption, small size, high reliability and easy maintenance; the measurement process is not affected by factors such as temperature, sediment, river pollutants, and floating objects on the water surface.

2. River Flow Monitoring Application Areas

1. Measurement of flow velocity, water level, flow and rainfall in rivers, lakes, tides, reservoir gates, groundwater pipe networks, irrigation canals, etc.

2. Auxiliary water treatment operations, such as urban water supply and sewage monitoring, etc.

3. Flow calculation, inlet and outlet flow monitoring, etc.

3. River Flow Monitoring Product Features

1. Non-contact measurement, combining cross-sectional parameters to calculate flow, not affected by wind, temperature, haze, silt, floating objects, etc.

2. It is suitable for a variety of measurement conditions, is not affected by corrosion and foam, and can output measurement data of flow rate, water level and flow.

3. The flow velocity and water level adopt a planar array radar antenna with built-in angle measurement function. The equipment is small in size and easy to install.

4. Convenient configuration software can configure parameters conveniently according to actual needs to adapt to different usage conditions.

5. Not affected by changes in water vapor, temperature and pressure in the atmosphere

4. River Flow Monitoring Platform

1. CS architecture software platform, supports direct observation through mobile phones and PC browsers, without the need to install additional software.

2. Support multiple accounts and multiple devices to log in

3. Support real-time data display and historical data display dashboard

4. Cloud servers and cloud data storage are stable, reliable, easy to expand, and load balanced.

5. Support SMS alarm and threshold setting

6. Support map display and view device information.

7. Support data curve analysis

8. Support data export in table format

9. Support data forwarding, HJ-212 protocol, TCP forwarding, http protocol, etc.

10. Support data post-processing function

11. Support external running of javascript scripts

5. River Flow Monitoring Summary Indicators

Supply voltage: 100mA (working), <1mA (sleeping);

Working voltage: 12V power supply

Operating temperature: -35℃~60℃;

Storage temperature: -40℃~60℃;

Field protection level: IP68

Signal output: RS485/MODBUS protocol;

6. River Flow Monitoring Technical Parameters

Water level measurement

Measuring range: 0.4-40 meters

Distance measurement accuracy: ±1cm

Distance measurement resolution: 1mm

Interval time: 1-5000min

Flow rate measurement

Distance measurement range: 0.15～15m/s

Speed measurement accuracy: ±2%

Speed resolution: 0.01m/s

Flow measurement

Flow rate = average flow velocity x flow cross-sectional area x correction factor

The average flow rate is obtained by collecting the surface flow rate of the fluid through the flow meter and calculating the model.

The cross-sectional area of the flow is calculated from the water level measured by the water level gauge and the cross-sectional information.

Rainfall monitoring

Measuring range: Rain intensity 0～4mm/min

Measuring accuracy: ±0.2mm

Resolution: 0.2mm

Rainwater receiving diameter: φ200mm

Power supply mode: solar panel + battery combination power supply

Solar power: 10W/30W (optional)

Battery parameters: DC3.7V 10Ah

Bracket height: 4 meters for vertical pole and 3 meters for horizontal arm

Working environment: -20℃～80℃ (no freezing)

VII. Notes on River Flow Monitoring Installation

1. Installation environment

There are no huge rocks blocking the water in the test channel section, and there are no huge whirlpools, turbulent flow, etc.

The test channel section should be straight, stable and have concentrated water flow

The test channel section needs to be hardened and the measurement section should be regular.

The test channel section should be kept smooth to prevent floating objects from accumulating.

2. Installation height

Recommended installation height 3-4 meters

3. Installation direction of flow meter

The velocity meter beam is recommended to face the incoming water direction

Attachment: Hydrological Monitoring Station Construction Manual

1. Principles of layout:

1. The land use situation within 1,000 meters of the monitoring point is relatively stable;

2. The horizontal plane around the monitoring point should ensure a capture space of more than 270°. If the monitoring point is close to a building, the horizontal plane around the monitoring point should have a free space of more than 180°;

3. The surrounding environment of the monitoring point is relatively stable, the location conditions must be long-term stable and sufficiently solid, and the safety and fire prevention measures must be guaranteed;

4. There is no strong electromagnetic interference or strong shock source near the monitoring point, and there should be stable lightning protection equipment around it as much as possible;

5. The monitoring point should have smooth and convenient access and conditions to facilitate maintenance;

6. The height of the monitoring point sensor should be within 2-5 meters from the ground;

7. There are no obvious fixed pollution sources within 50 meters around the monitoring point;

8. If the weather station is installed on a non-customized monitoring pole, the load-bearing capacity of the base pole must be considered;

9. The monitoring point should be selected in a place with sufficient light (the daytime light time should be kept for more than 6 hours) or there should be a stable and reliable AC220V power supply around the monitoring point.

2. Point confirmation

After the selection of the points is completed, the points will be marked on the plane map of the monitoring area. The plane map with the location marks of the monitoring points will be submitted to Party A for confirmation and signature.

3. Construction

1. Pre-buried monitoring pole cage

1) According to the actual geological conditions on site, the pre-buried pit for the monitoring pole foundation is constructed by manual labor and excavation. The size of the pre-buried pit is 100cm (length) * 100cm (width) * 100cm (depth). If over-excavation occurs, the abandoned soil shall not be used for on-site backfilling. Gravel or sand shall be used to backfill to the design value. The edge of the pre-buried pit shall be aligned with the due south and due north directions;

2) Place the embedded parts vertically in the pit with the threads facing upwards, and fill the pit with concrete (cement: sand = 1:3) until it is slightly above the ground level;

3) Depending on the season and local climate, air-dry for about 3 days until the cement foundation is completely solidified to complete the pre-embedding.

2. Equipment installation and monitoring pole erection

1) Fix the equipment on the equipment bracket with matching bolts, and pay attention to the installation of flat spring washers;

2) Use matching bolts to fix the equipment bracket about 3 meters from the monitoring pole;

3) Install the solar panel on the solar panel bracket with matching bolts;

4) Install the radar water level sensor on the flange with matching fasteners and fix the flange to the bracket.

IV. Construction quality control requirements and safety precautions

1. The whole process of monitoring pole construction should be carried out in sequence, and the pole appearance should be straight, streamlined, smooth and vertical;

2. The solar panel is tilted 45° towards the south;

3. The anti-rust layer of the monitoring rod must not be damaged;

4. The cable connectors are firm and reliable, waterproof and insulated, and not easily exposed;

5. Pay attention to the safety of pedestrians and vehicles during hoisting;

6. When hoisting the monitoring pole, be sure to tie a rope to control the stability of the lifting object;

7. Warning signs should be set up during lifting.

V. Construction Quality Assurance Measures

1. The main materials required should comply with the design documents and current standard requirements, and must have a factory certificate and should be tested when necessary.

2. Construction is strictly controlled according to the requirements of the specifications. And process inspection is carried out. Only when the previous process is qualified can the next process be constructed.

3. Strengthen quality awareness, strictly organize construction according to the design, current construction specifications and rules, as well as the owner's special requirements and on-site instructions, implement excellence work throughout the entire construction production process, and ensure project quality.

4. Strengthen process quality control, strictly organize production according to the quality assurance system, formulate operation standards, process standards, and inspection standards for each process and each link, keep records of the implementation of process standards, ensure that each process is connected in an orderly manner and achieve traceability.

5. Strengthen project management, implement the technical responsibility system, formulate targeted special construction plans, and carry out technical briefings carefully.

6. During construction, ensure that each sub-project meets the quality standards and all are of qualified quality, and establish model projects to drive the implementation of the entire project.

VI. Measures to ensure construction period

1. Strengthen technical guidance, strict management, and effective organization and coordination.

2. Strengthen management, improve the internal economic responsibility system, give play to the role of economic levers, and fully mobilize the enthusiasm and consciousness of the construction team as the organizational and ideological guarantee to ensure the construction period.

3. Organize a team with rich experience and strong construction capabilities; the personnel and mechanical equipment are well-equipped and complete to ensure that the construction plan is completed every day.

4. Grasp the node targets in stages. To facilitate inspection, assessment and adjustment, under the control of the overall construction plan, prepare the left and right construction plan targets, emphasize the node progress, and effectively control the realization of the overall plan.

5. Strengthen the management of material procurement and supply, and ensure timely supply of materials to meet the needs of project construction.

6. Actively coordinate relationships and create a good construction environment. Organize construction according to procedures to effectively control various factors that affect progress.

7. Safety construction management measures

During the implementation process, strictly abide by the laws and regulations on safety, health and environmental hygiene. Safety devices, equipment and protective equipment and other effective measures should be taken to protect the life, health and safety of on-site construction and supervision personnel;

8. Environmental Protection Measures

1. Waste treatment: Materials that are not suitable for filling should be neatly stacked or transported to designated places in a timely manner;

2. Construction wastewater should be discharged to the sewer in a timely manner and should not pollute natural water sources. Noise pollution should be prevented at the construction site and construction vehicles should not sound their horns;

3. Prevent the excavated soil from being washed away or overflowed by rainwater, as secondary dust is easily generated in dry weather. The transport crossings near the excavator need to be cleaned in time.

9. River Flow Monitoring installation photos