In addition to the aesthetic benefits of removing wrack from the tide line, it also prevents re-contamination. Often E.Coli and other bacteria will be in the water from farm runoff and waste management overflow. The water contaminates the wrack, leaving bacteria-infected waste on the beach. Then, after the ocean clears of the bacteria, the wrack line can re-infect it—perpetuating a hazardous cycle. Removing the wrack with a beach cleaner prevents this from happening.
Despite the visual and safety benefits of removing seaweed and other wrack from the tide line, certain beaches are mating grounds for certain rare or endangered sea creatures, which are negatively effected by beach cleaning. For example, Grunion fish in southern California lay their eggs and spawn on the beach surface from March thru June each year. During this time, all mechanical beach cleaners are prohibited from operating bellow the tide line. Similarly Piping Plovers nesting areas are completely off limits.
However, other environmental issues allow for more flexible beach cleaning practices, and it is important that a beach cleaner machine is able to adapt to the associated regulations if it operates in such areas. For example, sea turtles in Florida lay their eggs in the sand. A deep-digging beach cleaner could remove or damage these eggs and quickly destroy the sea turtle population.
Instead, beach cleaning is allowed with mechanical beach cleaners when they follow certain strict regulations. Specifically, Florida requires that the machine's footprint is 10 psi. Large floatation tires distribute the machines weight and allow for such even weight distribution, which keeps the weight of the machine from crushing the buried eggs. Similarly, machines are not allowed to clean more than two inches bellow the sand’s surface, as the eggs are typically buried about 10 inches deep. As discussed in a previous blog post, adjusting a beach cleaner’s mold board to a two inch cleaning depth ensures that the machine’s tines clean surface material without disturbing the eggs bellow. Sifting machines need to be careful not to dig their cutting edge too deep into the sand, which can be a tricky endeavor.
In summary, it is important to balance health, aesthetic, and environmental concerns when cleaning beaches with mechanical beach cleaners. An adaptable beach cleaning machine can ensure this balance is met, providing the best results for both environmental safety and beach appearance.