Fish Screen – Definition & Detailed Explanation – Hydroelectric Power Glossary Terms

I. What is a Fish Screen?

A fish screen is a device used in hydroelectric power plants to prevent fish and other aquatic organisms from being drawn into water intake systems. These screens are essential for protecting fish populations and maintaining the ecological balance of rivers and streams. Fish screens are typically made of mesh or other materials that allow water to pass through while blocking fish and debris.

II. How does a Fish Screen work?

Fish screens work by diverting fish away from intake structures and guiding them back into the natural flow of the water. The screens are placed in front of intake pipes or channels, where water is drawn into the power plant for electricity generation. As water passes through the screen, fish are prevented from entering the intake system and are directed back into the river or stream.

III. Why are Fish Screens important for Hydroelectric Power?

Fish screens are crucial for hydroelectric power plants because they help protect fish populations and maintain the health of aquatic ecosystems. Without fish screens, fish can become trapped in intake systems or turbines, leading to injury or death. By using fish screens, power plants can reduce their impact on fish populations and comply with environmental regulations.

IV. What are the different types of Fish Screens?

There are several types of fish screens used in hydroelectric power plants, including passive and active screens. Passive screens rely on the natural flow of water to divert fish away from intake structures, while active screens use mechanical devices to guide fish back into the river. Other types of fish screens include traveling screens, drum screens, and wedge-wire screens, each with its own unique design and function.

V. What are the benefits of using Fish Screens in hydroelectric power plants?

The use of fish screens in hydroelectric power plants offers several benefits, including protecting fish populations, maintaining water quality, and ensuring compliance with environmental regulations. By preventing fish from entering intake systems, fish screens help reduce mortality rates and preserve the ecological balance of rivers and streams. Additionally, fish screens can improve the efficiency of power plant operations by reducing downtime and maintenance costs.

VI. How are Fish Screens maintained and monitored?

Fish screens require regular maintenance and monitoring to ensure they are functioning properly and effectively protecting fish populations. Maintenance tasks may include cleaning the screens, inspecting for damage, and replacing worn or broken parts. Monitoring efforts involve assessing fish passage rates, conducting visual inspections, and using underwater cameras to observe fish behavior around the screens. By staying vigilant and proactive in their maintenance and monitoring efforts, hydroelectric power plants can continue to benefit from the use of fish screens.