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Multi parameter monitoring system for floating and drifting in Pushiguqiao Jing River, Lingxiangdian, Taizhou City, Zhejiang Province

Date: 2025-12-22Read: 0

Multi parameter monitoring system scheme for floating and drifting in Pushiguqiao Jing River, Lingxiangdian, Taizhou City, Zhejiang Province

1、 Background and objectives of system construction

（1） Construction background

Shiguqiao Jing is located in the Lingxiangdianpu area of Taizhou City, Zhejiang Province. It is a tributary of the Yongning River, with a total length of about 1300 meters. It is adjacent to the agricultural port city. Due to problems such as direct discharge of sewage from surrounding catering businesses and leakage from garbage dumps, the river channel has silted up, the water body has turned black and smelly, and it has become a key and difficult river section for regional water environment governance. Although the main sources of pollution have been eliminated through measures such as dismantling illegal containers and relocating garbage dumps in the early stage, there are still hidden pollution risks such as rainwater pipes secretly discharging sewage at night in the river. The traditional manual inspection and monitoring mode has disadvantages such as low frequency, poor timeliness, and difficulty in detecting hidden pollution, which cannot meet the needs of refined management and protection.

To consolidate the effectiveness of water control and implement the requirements of river chief management, it is urgent to establish an automated and real-time water quality monitoring system. The floating multi parameter monitoring system, with its flexible deployment, unmanned operation, and full-time monitoring advantages, can accurately capture changes in water quality, timely warn of pollution risks, and provide scientific data support for the long-term management and protection of the Shiguqiao Jing River.

（2） Construction Goal

1. Real time perception of water quality status: achieve continuous monitoring of core parameters of water bodies in key sections of Shiguqiao Jing, and grasp the dynamic changes in water quality;

2. Accurate warning of pollution risks: Establish a threshold warning mechanism to address issues such as hidden pollution discharge and sudden changes in water quality, and shorten emergency response time;

3. Support scientific decision-making management: provide objective data basis for the performance of the river chief system, pollution tracing, and evaluation of governance effectiveness;

4. Build a long-term management and protection system: Combining intelligent water management technology, promote the transformation of monitoring mode from "manual inspection" to "intelligent perception", and improve the efficiency of river management and protection.

2、 Overall system architecture

The system adopts a three-layer architecture of "front-end perception network transmission cloud application" to form a closed-loop management process of "monitoring transmission analysis warning disposal", achieving full chain intelligent supervision of the water quality of Shiguqiao Jing River.

（1） Front end perception layer

Deploy a floating monitoring station as the core sensing unit, integrating multi parameter water quality sensors, data acquisition modules, solar power supply systems, and anchoring devices to achieve in-situ collection and local storage of water parameters; For key pollution risk points such as rainwater discharge outlets, auxiliary deployment of input sensors will be carried out to strengthen the monitoring of characteristic pollutants.

（2） Network Transport Layer

Using 4G/NB IoT wireless communication technology, the water quality data collected by the front-end is encrypted and transmitted in real-time to the cloud platform, ensuring the stability and security of data transmission; Support local data storage backup to avoid data loss caused by network interruptions.

（3） Cloud application layer

Build a cloud management platform that integrates data display, analysis and warning, and equipment management to achieve visual presentation of water quality data, historical data query, abnormal warning push, and remote control of equipment, supporting collaborative disposal among multiple departments.

3、 Core components and technical parameters of the system

（1） Core configuration of float monitoring station

The floating monitoring station, as the front-end perception core, adopts modular design and is deployed at three key sections including the intersection of the main and tributary streams of Shiguqiaojing and downstream of the rainwater discharge outlet. The specific configuration is as follows:

Float body: made of ultra-high molecular weight polyethylene material, with a diameter of about 408mm and a low center of gravity design, it has the characteristics of corrosion resistance, impact resistance, and anti biological attachment, and is suitable for river water flow environment;
Power supply system: equipped with 11W solar panels and 60Ah lithium battery pack, using MPPT automatic power point tracking technology to ensure continuous power supply for more than 7 days in rainy weather, meeting the needs of unmanned operation;
Anchoring system: using 2.5kg cast iron anchor with 10 meter nylon rope to ensure the stability of the buoy under the impact of river water flow and ensure the representativeness of monitoring data;
Protective device: equipped with GPS positioning and anti-theft alarm lights, supporting real-time tracking of device location and security warning.

（2） Multi parameter monitoring indicators and technical parameters

Based on the pollution risk characteristics of Shiguqiao Jing, the focus is on monitoring the conventional five parameters and characteristic pollutants. The sensors adopt advanced detection principles such as fluorescence and spectroscopy, and have automatic cleaning functions to reduce operation and maintenance costs. The specific parameters are shown in the table below:

monitoring indicators	measurement range	measurement accuracy	Measuring principle	remark
water temperature	-20~60℃	±0.5℃	thermocouple	Conventional five parameters
PH value	0~14pH	±0.05pH	glass electrode	Conventional five parameters
dissolved oxygen	0~20mg/L	±2%FS	Fluorescence photometry method	Conventional five parameters
conductivity	0~100mS/cm	±1%FS	conductance method	Conventional five parameters
turbidity	0~1000NTU	±3%FS	90 ° scattered light	Conventional five parameters
COD (Chemical Oxygen Demand)	0.75~475mg/L	±3%FS	Spectral method	characteristic pollutant
ammonia nitrogen	0~10mg/L	±5%FS	Ion selection method	characteristic pollutant

（3） Data transmission and cloud platform

Data transmission: using 4G wireless communication module, supporting Modbus/RTU protocol, data upload frequency can be customized (default 5 minutes/time), transmission delay<1 minute; Equipped with breakpoint resume function, automatically replenishing historical data after network recovery;
Cloud platform functions:

Data visualization: Present real-time/historical water quality data in the form of charts and curves, supporting single parameter trend analysis and multi parameter correlation comparison;
Warning management: pre-set water quality parameter thresholds (such as pH<6.5 or>8.5, COD>50mg/L, etc.), and push alarm information through SMS or APP in case of abnormalities, supporting warning level grading;
Equipment management: supports the display of monitoring site topology diagrams, real-time monitoring of equipment online status, power consumption, sensor calibration status, and remote setting of collection frequency and calibration parameters;
Report generation: Automatically generate daily/weekly/monthly water quality monitoring reports, support data export, and provide a basis for water control effectiveness assessment;
Multi cross collaboration: Reserve interfaces for docking with the "HeChang Online" platform in Taizhou City to achieve data sharing and collaborative processing.

4、 System deployment and implementation process

（1） Layout of monitoring points

Based on the characteristics and pollution risks of the Shiguqiao Jing River channel, a grid based distribution strategy is adopted:

Upstream control section: deployed near the source of Shiguqiao Jing to monitor the background water quality of the river channel;
Key midstream sections: deployed 50 meters downstream of rainwater discharge outlets, with a focus on monitoring the impact of illegal sewage discharge on water quality;
Downstream outlet section: deployed at the intersection of Shiguqiao Jing and Yongning River, monitoring the effluent quality of the river and evaluating the effectiveness of treatment.

（2） Implementation process

Preliminary research and plan optimization: Conduct on-site investigations on river depth, flow velocity, pollution source distribution, etc., refine point layout and equipment parameters;
Equipment integration and calibration: Complete sensor assembly, data acquisition module configuration, perform laboratory standard liquid calibration to ensure monitoring accuracy;
On site installation and networking: Lift and place the floating monitoring station at the preset point, fix the anchoring system, and complete the 4G network activation and cloud platform docking;
System integration and trial operation: Test the stability of the entire process of data collection, transmission, and display, optimize warning thresholds and upload frequency;
Acceptance and operation training: Complete system function acceptance, provide equipment inspection, data interpretation, fault handling and other training for management and maintenance personnel.

5、 Operation and maintenance guarantee system

（1） Daily operation and maintenance

Sensor maintenance: Clean probe attachments every 2 months, conduct on-site accuracy verification and calibration every quarter;
Equipment inspection: Check the integrity of the buoy body, cleanliness of the solar panel, stability of the anchoring system, and test the power supply and communication functions every six months;
Data quality control: Establish a mechanism for identifying abnormal data, eliminate interference values through time series comparison and sensor data correlation analysis, and ensure data accuracy.

（2） Emergency support

Establish an emergency response mechanism for equipment failures, and complete on-site disposal within 24 hours upon receiving offline equipment or abnormal data alarms; Equipped with backup sensors and communication modules to ensure rapid system recovery and operation.

6、 System application value

Improve regulatory efficiency: achieve 24-hour unmanned monitoring, increase data collection frequency to the minute level, replace traditional daily manual sampling, and significantly reduce the burden of grassroots river chiefs on river patrols;
Accurate pollution tracing: By analyzing the water quality change curves of key sections, hidden pollution sources such as nighttime illegal discharge can be quickly identified, providing precise targeting for law enforcement and disposal;
Reduce management costs: Integrated design and intelligent operation and maintenance reduce single point construction costs by 30%, reduce manual inspection workload by 60%, and achieve efficient and low-cost supervision;
Consolidate the effectiveness of water management: Promote the transformation of water environment supervision from post disposal to pre prevention and control, and help Shiguqiao Jing achieve the long-term management and protection goals of "clear water, smooth rivers, green banks, and beautiful scenery".

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