They are found in both coastal and inland regions. Each region, however, has its own unique type of wetland, because wetlands vary in water levels in different regions. This creates different and unique habitats. No two wetlands are alike. Wetlands maintain water quality by retaining excess nutrients and pollutants that would clog waterways.
Wetlands also maintain stream flow during dry periods and replenish groundwater for drinking.
Wetlands offer flood protection by acting as natural sponges. Wetlands store the flood water and then slowly release it back into the environment. Wetlands provide erosion control . The many plants which flourish in a wetland hold the soil in place with their roots. The plants also absorb the energy or force of impact from the waves and breakup the flow of the waterways.