灌溉排水学报2017，Vol.36Issue(11)：29-35,7.DOI:10.13522/j.cnki.ggps.2017.11.006
水稻灌区农业面源污染物迁移转化规律模拟研究
Simulating the Transport and Transformation of Non-point Contaminants in Paddy Field within a Irrigated District
摘要
Abstract
Simulating transport and transformation of contaminantsin irrigated paddy fields is essential to under-stand the mechanisms underlying their movement and accumulation, providing guidance to remediation strate-gies. In this paper, we divided paddy field water into surface and subsurface waters. The leaching of surface water and the dissolved solute NH4+, NO3-and PO43-within it were calculated using water-balance method. Water in the soil was simulated numerically from transient flow equation, from which we calculated the discharge rate to drain-age ditch. Water flow in the drainage network was simulated using the wave equation and the biochemical reac-tion of the solutes was described by first-order kinetics. We then applied the model to Qianguo Irrigation District. The data measured over 2008—2009 were used to estimated the model parameters, and the model was validated against the data measured in 2010. The results showed that the model was capable of reproducing the break-through curves of these solutes in both surface and subsurface water. The Nash-Sutcliffe coefficient of the concen-trations of NH4+, NO3-and PO43-simulated from the model was 0.772, 0.758 and 0.709 respectively, with their as-sociated root-mean-square error being 0.645, 0.70 and 0.854 and relative root-mean-square error being 0.072, 0.060 and 0.031 respectively.关键词
面源污染/水稻灌区/一阶动力学方程/模拟Key words
agricultural non-point source pollution/rice irrigation district/first order kinetic equation/simulation分类
资源环境引用本文复制引用
李玉庆,张存,张文贤..水稻灌区农业面源污染物迁移转化规律模拟研究[J].灌溉排水学报,2017,36(11):29-35,7.基金项目
西藏自治区科技厅农牧业科技成果转化与示范项目 （）
西藏自治区科技厅科技重大专项(Z2016C01G01/07) （Z2016C01G01/07）
国家重点研发项目(2016YFC0402405) （2016YFC0402405）
国家自然科学基金项目(51379152,91647109,51679257) （51379152,91647109,51679257）
