| 农田排水及氮素流失过程模拟 |
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| 引用本文： | 罗文兵,洪林.农田排水及氮素流失过程模拟[J].武汉大学学报(工学版),2011,44(4):471-475. |
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| 作者姓名： | 罗文兵 洪林 |
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| 作者单位： | 武汉大学水资源与水电工程科学国家重点实验室,湖北武汉,430072 |
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| 基金项目： | 国家自然科学基金重点项目(编号:50639040); 教育部科学研究重大项目(编号:308017); 湖北省自然科学基金项目(编号:2005ABA290) |
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| 摘 要： | 为了了解农田排水及养分流失特性,利用DRAINMOD-N模型对湖北漳河灌区水旱农田地下水位变化及地表径流氮素流失过程进行了模拟.结果表明:水田和旱地地下水位逐日实测值与模拟值的相关系数分别为0.817和0.849,效率系数分别为0.209和0.582,相关性较好.另外,农田排水氮素流失模拟值与实测值非常接近.水稻田地表排水铵态氮流失量要高于硝态氮,旱作硝态氮流失量远远高于铵态氮.水田和旱地硝态氮模拟的相对误差分别为8.35%和5.45%,铵态氮的相对误差分别为10.99%和14.11%,都在允许误差范围内.
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| 关 键 词： | DRAINMOD-N模型 农田排水 氮素流失 过程 模拟 |
Simulation of farmland drainage and nitrogen loss processes |
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| LUO Wenbing,HONG Lin.Simulation of farmland drainage and nitrogen loss processes[J].Engineering Journal of Wuhan University,2011,44(4):471-475. |
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| Authors: | LUO Wenbing HONG Lin |
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| Affiliation: | LUO Wenbing,HONG Lin(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China) |
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| Abstract: | In order to understand the characteristics of farmland drainage and nitrogen loss,the processes of groundwater table changes and nitrogen loss in surface runoff from upland and paddy fields in Zhanghe Irrigation District,Hubei Province,are simulated based on DRAINMOD-N model.Results show that for the paddy field,the correlation coefficient between the observed and simulated daily groundwater tables is 0.817,and the model efficiency is 0.209;and for corn field,they are 0.849 and 0.582 respectively,with good ... |
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| Keywords: | DRAINMOD-N model farmland drainage nitrogen loss process simulation |
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