WILDLIFE HABITAT AND PUBLIC USE BENEFITS OF TREATMENT WETLANDS

Constructed and natural wetlands are being utilized for water quality management of a broad variety of wastewater types worldwide. While wat er treatment is a primary goal of many of these systems, there is a ge neral recognition that ancillary benefits for public use and wildlife habitat are typical of some of these wetlands. Also, there are growing numbers of constructed wetlands that are primarily focused on providi ng habitat and/or public use while relying on pretreated wastewater as the principal water supply. Efforts are currently underway to documen t the normal ranges of human and wildlife use benefits of treatment we tlands, and to provide a reasoned assessment of the potential environm ental risks associated with these systems. Information collected from existing surface-flow treatment wetlands indicates consistent net bene fits for wildlife habitat and public use. An understanding of the rela tionship between design and operation of treatment wetlands, and their positive and negative ecological and societal responses, will allow f or optimization of new wetland systems. (C) 1997 IAWQ.