ABSTRACT
Treatment wetlands in general are plant-soil-water systems utilized to promote water quality improvement. This book expands and modernizes information concerning a specific type of treatment wetland, the free water surface system, often called a marsh. It is further restricted to waters at relatively low contaminant concentrations. As a consequence, it is positioned in the gap between ecological desires for wetland restoration and preservation, and engineering concerns for reliable and economical methods for water quality improvement.
