Why is mechanical removal of aquatic weeds not practical for large bodies of water?

Mechanical removal of aquatic weeds becomes impractical for large bodies of water primarily due to its high cost associated with extensive management efforts. Large areas require significant resources, including labor, equipment, and maintenance. As the size of the water body increases, the logistics of transporting necessary equipment and personnel also complicate the operation, making it economically unfeasible.

The costs involved can escalate rapidly, especially when considering the need for repeated management efforts to keep aquatic weed growth in check. In contrast, other methods like chemical application or biological controls may offer a more cost-effective and efficient solution for controlling invasive species over large areas. This financial aspect is a crucial factor in the decision-making process for managing aquatic vegetation in larger environments.