『Abstract
　The Kuihe River is in Xuzhou, Jiangsu, China. It contains high concentrations of nitrogen. The water in the Kuihe River recharges the groundwater via riverbank filtration (RBF) along the Xucun and Huangqiao reaches, which are characterized by unsaturated and saturated percolations, respectively. The two sections were selected to study the effectiveness of RBF to the nitrogen removal from the infiltrating river water. The results showed that the RBF in the saturated percolation had the potential to remove the nitrogen through biochemical processes. The nitrogen-removal rates were more than 95％ over the monitoring period. However, the RBF in the unsaturated percolation resulted mainly from the physical process and thus had no efficacy for nitrogen removal.

keywords: Kuihe River; Riverbank filtration; Saturated percolation; Nitrogen removal; China』

Introduction
Field study
　Study site
　Field monitoring
Results and discussion
　Assessment of the groundwater quality
　Characteristics of RBF in nitrogen removal
　Effect of unsaturated and saturated percolation on nitrogen removal
　Effect of the seasons on nitrogen removal
　Effect of the interface thickness between the river and groundwater on nitrogen removal
Conclusion
Acknowledgments
References

• Doussan,C., Guillemette,P., Emmanuel,L. and Michel,D.(1997): Riverbank filtration: modeling of the changes in water chemistry with emphasis on nitrogen species. J.Contam.Hydrol., 25(1-2), 129-155.
• Hiscock,K.M. and Grischek,T.(2002): Attenuation of groundwater pollution by bank filtration. J.Hydrol., 266, 139-144.
• Ray,C., Grischek,T. and Schubert,J.(2002): A perspective of riverbank filtration. J.Am.Water Works Assoc., 94(4), 149-162.
• Weiss,W.J., Bouwer,E.J. and Aboytes,R.(2005): Riverbank filtration for control of microorganisms: results from field monitoring. Water Res., 39, 1990-2001.