Wetlands International was involved in the rehabilitation of man-made lakes at the National Hydrological Research Institute Malaysia (NAHRIM). The aim was to improve conditions of the lake, this was done by emulating the functions of natural lake systems. The construction of proper wetland cells which will act as a filtration and pollution control medium to improve water quality in the lakes. Wetland plants will assist the filtration process and act as a pollution control medium that will cleanse the water flowing into this wetland cell before being discharged into a bigger lake. It also aim to conserve the richness of aquatic biodiversity of the lake environment, by increasing the abundance of species.