Wastewater New York State Practice Exam

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What is the likely cause of weed growth in a lagoon?

Poor drainage
Poor circulation and maintenance
Overfertilization
High temperature

The correct answer is: Poor circulation and maintenance

The presence of weed growth in a lagoon can be primarily attributed to poor circulation and maintenance. When there is inadequate circulation within the lagoon, it can lead to stagnant water conditions. Stagnation allows sunlight to penetrate easily, promoting algal blooms and the growth of aquatic weeds. Additionally, insufficient maintenance can exacerbate the problem, as accumulated organic matter and debris provide a fertile environment for weeds to thrive. Without regular maintenance measures such as removing debris, monitoring and controlling nutrient levels, and ensuring that the lagoon is functioning optimally, the conditions will create a favorable environment for weeds and unwanted vegetation to grow unchecked. This is why poor circulation and maintenance play a critical role in the likelihood of weed growth in lagoons.