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引用本文:梁威,刘凌,潘沛.在土槽尺度下的硝态氮迁移模拟研究.湖泊科学,2007,19(6):710-717. DOI:10.18307/2007.0614
LIANG Wei,LIU Ling,PAN Pei.Simulation of nitrate-nitrogen transfer in trough scale. J. Lake Sci.2007,19(6):710-717. DOI:10.18307/2007.0614
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在土槽尺度下的硝态氮迁移模拟研究
梁威1,2, 刘凌1,2, 潘沛1,2
1.河海大学水文水资源与水利工程科学国家重点实验室, 南京 210098;2.河海大学水资源环境学院水文系, 南京 210098
摘要:
农业非点源污染研究是当前环境问题研究领域的重点和难点.目前而言土槽尺度下非点源模型的研究较少.利用大型土槽和人工降雨装置来模拟无植被坡地单次降雨过程地表径流中硝态氮迁移过程.在此基础上,适当选取AN-SWERS-2000的子模块建立起具有一定机理的适用模型,来研究土槽尺度下无植被坡地单次降雨过程地表径流中硝态氮迁移过程.经过三次实验验证,模拟的径流总量误差在4%-15%之间,CP′A在0.7-12之间;模拟的硝态氮总量误差的绝对值在9%-17%之间,CP′A在0.6-1.1之间.结果显示降雨径流、硝态氮浓度模拟结果与实际观测值有较好的一致性,模型模拟效果较好,模型可用于该尺度下硝态氮迁移量计算,具有一定的研究参考价值.
关键词:  农业非点源污染  土槽尺度  降雨径流  硝态氮  ANSWERS-2000模型  GREEN-AMPT下渗模型  迁移模拟
DOI:10.18307/2007.0614
分类号:
基金项目:国家自然科学基金重点项目(50239030)资助.
Simulation of nitrate-nitrogen transfer in trough scale
LIANG Wei1,2, LIU Ling1,2, PAN Pei1,2
1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;2.College of Water Resources and Environment, Hohai University, Nanjing 210098, P. R. China
Abstract:
Nowadays, research on ran-point source pollution which comes from agricultural activities has become ahot-point and diffcult-point issue in the area of enriromnental problem. But currently few researches have been made onnon-point~pollution in trough scale. By using big soil trough and artificial rainfall equipmern to simulate nature precipitation and flow in uncovered sloping field, a physically-based model based.ANSWERS-2000 and,combined submodules of ANSWERS-2000 is developed to study transfer rule of dissolved nutrient(Nitrate-Nitrogen) in the soil trough during single precipitation. The model had been validated three times. Total runoff errors werebetween 4%-15% andCPAwere between 0. 7-1 2. Accordingly, total Nitrate-Nitrogen errors~between 9%-17% and CP,,~between 0. 6-1. 1. Results showed that the simulation value of runo$ and Nitrate-Nitrogen-centration basically accords with the observed value. The modelbe used to calculate the transporting amount ofNitrate-Nitrogen in trough scale during single precipitation and had some reference values for future research.
Key words:  Agricultural non-point source pollution  trough scale  precipitation nmofF  Nitrate-Nitrogen  ANSWERS-2000 Model  GREEN-AMl'T infiltration model  transfer simulation
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