Stormwater-Sewage Separation Online Monitoring System Solution

Stormwater and sewage network separation monitoring with overflow early warning and real-time water quality alarms

Overview

Summary

Stormwater and sewage network separation monitoring with overflow early warning and real-time water quality alarms

Key Advantages

Real-time stormwater/sewage network level and flow monitoring

Automatic identification of dry-weather sewage discharge and wet-weather overflow

Multi-parameter online water quality monitoring (COD/ammonia/pH)

GIS map visualization and pollution source tracing analysis

Storm warning linkage and emergency dispatch

Quantitative assessment of separation retrofit effectiveness

Challenges

Widespread stormwater-sewage cross-connections causing dry-weather sewage discharge and wet-weather overflow
Manual inspection cannot timely detect cross-connections with low efficiency and high cost
Unknown network status during storms with delayed overflow pollution warnings
Lack of quantitative assessment tools for separation retrofit effectiveness
Limited water quality monitoring points making pollution source tracing difficult

Results

200 monitoring points deployed in city center, 58 cross-connections identified and corrected in 3 months
Water quality compliance rate improved from 65% to 92% after monitoring system launch
30-minute advance warning prevented 3 major pollution incidents during storms
Precise location of 5 illegal discharge enterprises through water quality source tracing
Retrofit effectiveness assessment cycle reduced from 6 months to real-time

Solution Details

Policy Background for Stormwater-Sewage Separation

Effective stormwater-sewage separation is crucial for urban water body pollution control. Regulatory requirements increasingly mandate the elimination of direct sewage discharge and the implementation of separate drainage systems. Cross-connections between stormwater and sewage networks remain a major cause of urban water pollution.

Technical Highlights: Multi-dimensional Monitoring and Intelligent Recognition

Ecolor's stormwater-sewage separation online monitoring system solution utilizes a three-dimensional "flow + level + water quality" monitoring approach for the precise identification of cross-connections and overflow pollution. Dry-weather baseflow analysis establishes normal flow baselines; rainfall response models predict overflow risks; water quality fingerprinting enables rapid pollution source tracing.

Key Features of the Monitoring System

Real-time stormwater/sewage network level and flow monitoring
Automatic identification of dry-weather sewage discharge and wet-weather overflow
Multi-parameter online water quality monitoring (COD/ammonia/pH)
GIS map visualization and pollution source tracing analysis
Storm warning linkage and emergency dispatch
Quantitative assessment of separation retrofit effectiveness

Application Scenarios

This solution is designed for urban water pollution control, separation retrofit effectiveness assessment, drainage user supervision, and storm flood early warning.

System Architecture of the Separation Monitoring Solution

The system features a robust four-layer architecture:

Sensing Layer: Utilizes Doppler flowmeters, level meters, and integrated water quality stations.
Transmission Layer: Data is transmitted reliably via the Hero V9 RTU with 4G/NB-IoT connectivity.
Platform Layer: Handles data aggregation, management, and GIS-based visual display.
Application Layer: Provides core functions including cross-connection identification, overflow warning, and pollution source tracing.

Approach

How we implement intelligence into your infrastructure step by step.

Network Survey & Site Planning

Survey stormwater/sewage network distribution, outfall locations, and flood-prone areas; plan monitoring point layout prioritizing key rivers and historical overflow points.

Monitoring Equipment Deployment

Install Ecolor Doppler radar flowmeters, ultrasonic level meters, and water quality stations at key nodes; deploy Hero V9 RTU for data collection and 4G transmission.

Platform Setup & Model Building

Build monitoring platform, import GIS and meteorological data, establish dry-weather baseflow and storm overflow prediction models.

Trial Run & Problem Investigation

Analyze monitoring data during trial period to identify suspected cross-connections and illegal discharges, guide field investigation and remediation.

Long-term O&M & Effectiveness Assessment

Continuous monitoring of separation retrofit effectiveness with periodic reports on water quality compliance, overflow frequency, and remediation progress.