“Wetlands –whether natural or constructed – provide a fascinating setting, teeming with myriad forms of biological life and activity. They have increasingly become recognized for their unique ecological functions in our environment and are the focus of increased research by scientists and interpretive programs by schools, communities and nature centers”
(Campbell, C. and M. Ogden,1999

Constructed Wetlands and Water Retention systems have a high potential for developing dense urban areas into a more sustainable landscape. Constructed wetlands play in important role for multifunctional purposes such as water storage, biological water purification, improvement of microclimate, reduction of the heat island effect and for storm water management. To ensure these abilities constructed wetlands need to be designed and build according to their purpose.