『Abstract
　Surface waters in Taihu Basin, China are increasingly threatened by phosphorus (P) related eutrophication. This study investigated the temporal-spatial status of P in sediment-water in riparian wetlands located in the southern region of Taihu Basin. Two sets of laboratory simulation study, 1) static columns and 2) steady-flow flumes representing wetland in both dry and rainy seasons, were carried out to understand the characteristics and mechanisms of P interaction between sediment and overlying water. In wetland sediments, significant increases in total P (TP) and NaHCO3 (pH=8.5) extractable P (Olsen-P) occurred with the increase of NaOH+EDTA extractable P (NaOH+EDTA-P). After comparing the P adsorption capacity (Qmax) with TP in the sediment, there could be a risk of P export from the sediment. In the static column experiment, dynamic characteristics of dissolved reactive phosphorus (DRP) in the overlying water can be divided into buffer reaction, rapid adsorption, and slow adsorption. A quasi U-pattern curve was observed in the steady-flow flume experiment, i.e., DRP in the overlying water decreased initially and then increased. Because upstream water with high P concentration flowed over the test wetland during rainy seasons, the ecological role of P interception by the sediment could be weakened.

Keywords: Overlying water; Phosphorus interception; Quasi U-pattern curve; Wetland sediment』

Introduction
Materials and methods
　Study site and sampling
　Physico-chemical analysis
　Laboratory simulation experiments
Results and discussion
　P status of sediments
　P status of overlying waters
　Relationship between P in overlying waters and sediment
　Laboratory P static simulation experiments
　Laboratory P steady-flow flume experiments
Acknowledgments
Appendix
References

※Olsen法など。