The statement "Beach is elevated and extended" is not a negative side effect of beach renourishment. In fact, it can be seen as a positive aspect, as the elevation and extension of the beach can enhance recreational space and protect coastal infrastructure. The other points you mentioned—cost, temporary results, and beach closures during the process—are indeed negative side effects associated with beach renourishment.
While beach renourishment is effective the following are negative except side effects
Expensive process
Beach is elevated and extended
Beaches must close during renourishment
Results are temporary and must be repeated every 5-7 years
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