The study looked at how adding floating treatment wetlands (FTWs) to stormwater retention ponds affects water flow. They did experiments with and without FTWs at different water flow rates. The results show that FTWs can improve the performance of retention ponds by reducing inefficiencies and increasing water retention time. The length of plant roots in the FTWs is important, with an optimal ratio of root length to pond depth. The way the plants are arranged in the pond also affects how well it works. Overall, adding FTWs to retention ponds can help them work better by improving water flow and retention.