4Go to the United States Code Service Archive Directory,TITLE 7.AGRICULTURE CHAPTER 73.Farmland Protection Policy,Copyright(c)2007 Matthew Bender & Company,Inc.110-119.
5Corwin D L, Wagenet R J. Application of GIS to the Modeling of Nonpoint Source Pollutions in the Vadose Zone: A Conference Overview. J Environ Qual , 1996, 25 (3) :403-411.
6House W A et al. Nutrient transport in the Humber rivers. The Science of the Total Environment, 1997, 194/195:303- 320.
7Behrendt H, Opitz D. Retention of nutrients in river systems: dependence on specific runoff and hydraulic load. Hydrobiologla, 2000, 410 : 111 - 122.
8Faafeng B, Roseth R. Retention of nitrogen in small streams artificially polluted with nitrate. Hydrobiologia, 1993, 251:111-122.
9Peterson B J et al. Control of nitrogen export from watershed by headwater streams. Science, 2001, 292: 86-90.
10Yin C Q et al. A multi-pond system as a protective zone for the management of lakes in China. Hydrobiologia, 1993,251:321 -329.
9ZHANG Xuyang, LIU Xingmei, ZHANG Minghua, et al.A review of vegetated buffers and a meta-analysis of their miti- gation efficacy in reducing nonpoint source pollution[J].Jour- nal of Environmental Quality,2010,39(1) :76-84.
