| RIP-N模型对官厅水库库滨带去氮效应的流域尺度模拟分析 |
| 摘要点击 1539 全文点击 1394 投稿时间：2008-10-22 修订日期：2009-01-06 |
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| 中文关键词 RIP-N模型 库滨带 氮 土壤反硝化 植物生长 官厅水库 |
| 英文关键词 RIP-N Model riparian zone nitrogen soil denitrification plant growth Guanting Reservior |
| 作者 | 单位 | | 王雪蕾 | 北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,遥感与地理信息系统研究中心,环境遥感与数字城市北京市重点实验室,北京100875 | | 刘昌明 | 北京师范大学水科学研究院,北京100875 | | 杨胜天 | 北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,遥感与地理信息系统研究中心,环境遥感与数字城市北京市重点实验室,北京100875 | | Mannaerts C M | International Institute for Geo-Information Science and Earth Observation,Enschede 7500 AA, Netherlands | | 高云飞 | 北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,遥感与地理信息系统研究中心,环境遥感与数字城市北京市重点实验室,北京100875 | | 李茜 | 中国环境监测总站,北京100012 |
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| 中文摘要 |
| 以官厅水库库滨带为研究对象,构建适用于流域尺度岸边带去氮负荷估算的生态水文模型——RIP-N(Riparian-Nitrogen)模型,对官厅水库库滨带2007年3～9月间岸边带去氮效应进行分析. 同时,在延庆水保站开展田间尺度的野外模拟实验,结合室内外试验分析和以往研究成果,对模型模拟结果进行验证.RIP-N模型包括土壤化学过程模拟和植物生长过程模拟.前者包括土壤反硝化模拟、硝化模拟和氨挥发模拟;后者包括植物净第一性生产力(net primary productivity, NPP)模拟、植物生产力分配模拟和植物营养元素吸收模拟.结果表明：①RIP-N模型模拟值与实验值的决定系数大于0.5,证明该模型在空间尺度模拟上的有效性及模拟结果的可靠性; ②模型模拟结果表明官厅水库库滨带流域3～9月对N的总去除量为5.91×103 t; ③RIP-N模型对官厅水库库滨带去氮环境效益分析表明,当前库滨带土地利用格局中,滩地、林地和草地是去污效果较好的土地利用类型, 3～9月对流域的去N量占流域总去N量的76.5％, 在非点源污染防治中起到“汇”的作用；但是研究区中专属湿地的“汇”作用表现不明显, 3～9月去N量仅占流域总去N量的5.9%. |
| 英文摘要 |
| An eco-hydrological model system (RIP-N) was constructed to simulate the nitrogen (N) removal by riparian zone in reservoir catchment scale. As a case study, the N removal in Guanting Reservoir riparian zone from March to September in 2007 was estimated. At same time, the field simulated experiment was carried out in Yanqing experimental station, which lies in the northeast part of the catchment. With the experimental data and previous studies, the RIP-N model was calibrated. RIP-N model was consisted with two parts, which were soil chemical process modeling and plant growth modeling. Soil chemical processes considered the soil denitrification, nitrification and ammonium volatilization. Plant growth included net primary productivity (NPP) module, plant production allocation module and nutrition uptake module. The research indicated that the correlation coefficient between simulated value and monitored value was larger than 0.5, which proved the effectiveness and reliability of RIP-N model in catchment scale simulating. The simulated results showed that the N removal loss by riparian zone in Guanting Reservoir catchment from March to September was 5.91×103 t. The model also identified the N removal functions of different land use. At present land use condition, the bottomland, forest land and grassland contributed positively environmental benefits and removed most of N. In the temporal scale, the N removal from March to September consisted 76.5％ of annual removal load. On the contrary, the wetlands just removed 5.9% of N of whole watershed. By comparison, the riparian zone was recognized as critical location for non point source pollution prevention. |
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