| 农业生态系统地下水氮面源污染数值模拟 |
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| 引用本文： | 虞子婧,王明玉,王辉民.农业生态系统地下水氮面源污染数值模拟[J].中国科学院研究生院学报,2009,26(6):774-780. |
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| 作者姓名： | 虞子婧 王明玉 王辉民 |
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| 作者单位： | 1. 中国科学院研究生院水系统安全研究中心/资源与环境学院,北京,100049
2. 中国科学院地理科学与资源研究所,北京,100101 |
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| 基金项目： | 中国科学院"百人计划"项目资助 |
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| 摘 要： | 结合农业生态系统特征,以实例展示了在仅有短期有限野外监测数据及少量野外试验条件下,通过合理概化、参数分步识别与过程综合分析等,使模型识别的可靠性提高,成功地建立了农业生态系统地下水氮面源污染数值模型,并反演出表征农业氮面源污染特征的地下水入渗补给强度和氮补给量.本研究对定量评价农业生态系统地下水氮面源污染,特别是对野外基本调查工作部署与根据有限的基本数据较好地模拟识别特征参数,具有一定借鉴意义.
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| 关 键 词： | 地下水 农业面源污染 数值模拟 模型参数反演 |
| 收稿时间： | 2009-04-09 |
| 修稿时间： | 2009-05-04 |
Numerical modeling of groundwater contamination from non-point sources of nitrogen in agricultural ecosystems |
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| YU Zi-Jing,WANG Ming-Yu,WANG Hui-Min.Numerical modeling of groundwater contamination from non-point sources of nitrogen in agricultural ecosystems[J].Journal of the Graduate School of the Chinese Academy of Sciences,2009,26(6):774-780. |
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| Authors: | YU Zi-Jing WANG Ming-Yu WANG Hui-Min |
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| Institution: | 1. Center for Water System Security &; College of Resources and Environment, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | A numerical model is presented for simulating groundwater contamination from the non-point sources of nitrogen in an agricultural ecosystem. We successfully established a model based on only the short-term and limited observed field data and field tests through the reasonable conceptualizations, stepwise parameter calibrations, and process integrations, which made the calibrated model more reliable. The recharge rates and nitrogen loading into groundwater were obtained by the inverse modeling approach. The results obtained would be informative for quantitative understanding of groundwater contamination from the non-point sources of nitrogen in agricultural ecosystems, especially for effective monitoring and model parameter estimations. |
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| Keywords: | groundwater agricultural non-point source contamination numerical modeling inverse approach |
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