What are the two main disadvantages of beach nourishment?
Beach nourishment is usually an ongoing process, which leads to higher costs over time and repeated disturbance of the ecosystem. Nourishment does not end erosion; it only provides additional sediments on which erosion will continue.
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Sea Level RiseThe global warming caused by the rise in greenhouse gases in the atmosphere is the main trigger for the sea-level rise in recent decades. The rising global temperatures are melting the ice caps at the poles leading to the increase in the water level in the sea. Beaches are threatened by sea level rise.
As water flows from land to coastal waters, it is often contaminated by untreated sewage from boats, pets, failing septic systems, fertilizers, and spills from hazardous substances. High levels of bacteria and other chemicals in the water can cause gastrointestinal illnesses in those who swim directly in the water.