What issues can algae in a reservoir cause?

Algae in a reservoir can lead to significant operational challenges and water quality issues, and the selection of filter clogging, taste, and odor encapsulates some of the most pressing concerns.

When algae proliferate, they can obstruct water treatment processes, particularly filtration systems. The biomass produced by algae can lead to clogs as it accumulates in filters, necessitating more frequent maintenance and downtime during treatment. This clogging can increase operational costs and complexity.

In addition to physical interference, algae can also produce natural byproducts that affect the taste and odor of the water. These compounds can make the water unpalatable and may even pose consumer health concerns, leading to public complaints and decreased acceptance of the treated water.

While the other options list valid issues associated with algae, such as water discoloration, toxicity, and increased turbidity, they do not directly address the immediate and observable impacts that operators deal with in terms of taste and odor, as well as the practical operation of filtration systems. These factors are crucial for maintaining the quality and safety of drinking water, highlighting why the chosen answer effectively captures the essence of the challenges posed by algae in a reservoir setting.