| 在土槽尺度下的硝态氮迁移模拟研究 |
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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[J].湖泊科学,2007,19(6):710-717. |
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| 作者姓名： | 梁威 刘凌 潘沛 |
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| 作者单位： | 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;河海大学水资源环境学院水文系,南京,210098 |
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| 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ANSWERS-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.
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| 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 土槽 尺度 硝态氮迁移 模拟研究 scale transfer 价值 计算 迁移量 模拟效果 一致性 观测值 模拟结果 硝态氮浓度 降雨径流 显示 误差 径流总量 实验验证 模型 |
| 收稿时间： | 2006-11-28 |
| 修稿时间： | 2007-01-17 |
Simulation of nitrate-nitrogen transfer in trough scale |
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| LIANG Wei,LIU Ling and PAN Pei.Simulation of nitrate-nitrogen transfer in trough scale[J].Journal of Lake Science,2007,19(6):710-717. |
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| Authors: | LIANG Wei LIU Ling and PAN Pei |
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| Institution: | State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;College of Water Resources and Environment, Hohai University, Nanjing 210098, P. R. China,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;College of Water Resources and Environment, Hohai University, Nanjing 210098, P. R. China and State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China;College of Water Resources and Environment, Hohai University, Nanjing 210098, P. R. China |
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| Abstract: | Nowadays,research on non-point source pollution which comes from agricultural activities has become a bet-point and difficult-point issue in the area of environmental problem.But currently few researches have been made on non-point source pollution in trough scale.By using big soil trough and artificial rainfall equipment to simulate na- ture precipitation and flow in uncovered sloping field,a physically-based model based on ANSWERS-2000 and re- combined submedules of ANSWERS-2000 is developed to study transfer rule of dissolved nutrient(Nitrate-Nitro- gen)in the soil trough during single precipitation.The model had been validated three times.Total runoff errors were between 4%-15% and CP'_A were between 0.7-12.Accordingly,total Nitrate-Nitrogen errors were between 9%- 17% and CP'_A were between 0.6-1.1.Results shined that the simulation value of runoff and Nitrate-Nitnogen con- centration basically accords with the observed value.The model can be used to calculate the transporting amount of Nitrate-Nitrogen in trough scale during single precipitation and had some reference values for future research. |
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| Keywords: | Agricultural non-point source pollution trough scale precipitation runoff Nitrate-Nitrogen ANSWELLS-2000 Model GREEN-AMPT infiltration model transfer simulation |
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