The eutrophication problem of coastal seawater has been a serious hazard in the last two decades in Eastern China.This problem is mainly caused by the nutrients like nitrogen and phosphorous from inland non\|point sources.The purification function of natural wetlands at big river deltas provides a potential solution to cut down nutrient input into the sea.The objective of this research is to develop a model to simulate the ability of nutrient reduction in the wetland system so as to evaluate to what extent ...