Surface water automatic monitoring stations are essential for real-time water quality management. Their placement follows hydrological, environmental, and administrative criteria to ensure representativeness and effectiveness. The main deployment sites include:
1. Major River Sections
Stations are often installed at the upper, middle, and lower reaches of major rivers to track pollution load changes and flux across borders. Key locations include national boundaries, provincial interfaces, and inflow/outflow points of main tributaries.
2. Lakes and Reservoirs
In lakes and reservoirs, stations are placed near drinking water intakes, eutrophic zones, and outlet structures. These sites help monitor algal blooms, nutrient dynamics, and overall aquatic ecosystem health.
3. Drinking Water Source Protection Areas
To safeguard public health, stations are established at water intake points and upstream buffer zones. Continuous monitoring here ensures rapid detection of contamination events.
4. Administrative Boundary Sections
Stations at junctions between cities, provinces, or countries provide critical data on transboundary water quality responsibilities and support ecological compensation mechanisms.
5. Key Pollution Source Influence Zones
Downstream of industrial parks, urban sewage outfalls, and intensive agricultural areas, monitoring stations assess the impact of discharged pollutants and support pollution control enforcement.
6. Sensitive Ecological Areas
Wetlands, nature reserves, and rare aquatic species habitats may host stations to detect early signs of ecological stress or degradation.

