Urban Drainage Network
Differentiated Monitoring for Huailai's Drainage-Network Renovation
1 / 4Project Background
Huailai County's old urban drainage network had deteriorated: mixed rain-sewage flows, blockages, hidden discharges and quality anomalies were hard to trace in aging infrastructure — so the renovation project built monitoring in from the start.
Customer Challenge
Old-town pipe conditions are complex, and different wells need different watches. A uniform configuration would overspend where little is needed and underserve the critical points — the scheme had to match monitoring depth to each location's actual risk.
The TENGINE Solution
In September 2023, 15 domestic-sewage wells were instrumented with a differentiated configuration: 5 points focus on level and flow, while the other 10 run the full ten-parameter suite — velocity, level, flow, COD, ammonia nitrogen, dissolved oxygen, conductivity, turbidity, pH and temperature — using TNET-100 multi-parameter data terminals, Doppler point-velocity meters, integrated UVC COD analyzers, electrode-method ammonia-nitrogen analyzers, dissolved-oxygen, conductivity and turbidity instruments, all uploading over 4G.
Implementation
The differentiated scheme was installed and commissioned in September 2023, with 4G upload to the supervision platform; warranty includes two on-site inspection visits per year.
Project Results
The renovated network is now observable end to end: quality and quantity dynamics are tracked in real time, blockages, leaks and illegal discharges are found and handled early, and the county has a scientific basis for retrofit evaluation and long-term drainage management.
Related Case Studies
Illegal discharge is hard to catch: it typically happens in the small hours when manual patrols cannot cover; discharge points are scattered and some enterprises use hidden pipes; and without continuous data, regulators only discover pollution after the damage is done.
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The monitoring points are numerous and sit inside stormwater wells: cramped, harsh underground spaces where installation is difficult. The system had to feed flow, level and conductivity data to the municipal smart supervision platform — with battery power and wireless transmission, since wells have neither.
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