Physical Treatment Methods for Excessive Chlorophyll in Reservoirs

Excessive chlorophyll levels in reservoirs indicate algal blooms, which can harm water quality and ecosystem health. Physical treatments offer immediate, chemical-free control by targeting algae directly. Key methods include:

1. Ultrasonic Treatment: Ultrasonic devices emit high-frequency sound waves that disrupt algal cells, causing them to sink and die. This method is eco-friendly and suitable for localized areas.

2. Water Circulation: Installing circulators or mixers breaks up thermal stratification, reducing stagnant conditions that favor algal growth. This also improves oxygen levels and discourages bloom formation.

3. Shading Techniques: Using floating covers or dyes limits sunlight penetration, inhibiting photosynthesis and slowing algal reproduction. This is effective for small reservoirs or critical zones.

4. Mechanical Removal: Skimming or dredging equipment physically extracts algal mats from the water surface. While labor-intensive, it provides rapid results for severe blooms.

These physical approaches are often used in combination for better efficiency. Selection depends on factors like reservoir size, bloom severity, and cost considerations. Regular monitoring ensures timely intervention and long-term management.