| 近海流域氮流失风险评价 |
| |
| 引用本文： | CHEN Neng-Wang,HONG Hua-Sheng,ZHANG Luo-Ping,CAO Wen-Zhi. 近海流域氮流失风险评价[J]. 土壤圈, 2007, 17(4): 467-474. DOI: 10.1016/S1002-0160(07)60056-3 |
| |
| 作者姓名： | CHEN Neng-Wang HONG Hua-Sheng ZHANG Luo-Ping CAO Wen-Zhi |
| |
| 作者单位： | State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen 361005 （China）. |
| |
| 摘 要： | Probabilistic risk assessment （PRA） uses probability theory to quantify the probability of occurrence of an event. In this study, PRA was conducted for the discharge of excess nitrogen （N） from an agricultural （Jiulong River） watershed in Southeast China. Using fault tree analysis, a type of PRA, the probability of occurrence of excess N discharge into the river during a runoff event was evaluated both qualitatively and quantitatively. Land use maps, soil maps, fertilizer use records, and expert opinions were used to determine probabilities of individual events within the fault tree and to calculate the overall probability of excess N discharge during a runoff event. Qualitative analysis showed that the risk of excess N discharge was mainly related to crop and livestock practices in the watershed. Proper management of tillage, fertilizer, and manure was necessary to control N releases. Quantitative assessment results indicated that alternative practices including reduction of fertilization, installation of vegetative strip buffer around the pig farms, and installation of more riparian buffers along the Jiulong River could reduce the likelihood of N discharge through runoff.
|
| 关 键 词： | 氮流失 风险评估 海岸带 土壤学 |
| 收稿时间： | 2007-01-23 |
| 修稿时间： | 2007-02-232007-05-22 |
Risk assessment of nitrogen discharge from a coastal watershed |
| |
| CHEN Neng-Wang,HONG Hua-Sheng,ZHANG Luo-Ping and CAO Wen-Zhi. Risk assessment of nitrogen discharge from a coastal watershed[J]. Pedosphere, 2007, 17(4): 467-474. DOI: 10.1016/S1002-0160(07)60056-3 |
| |
| Authors: | CHEN Neng-Wang HONG Hua-Sheng ZHANG Luo-Ping CAO Wen-Zhi |
| |
| Affiliation: | State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen 361005 (China). E-mail: nwchen@zju.edu.cn;State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen 361005 (China). E-mail: nwchen@zju.edu.cn;State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen 361005 (China). E-mail: nwchen@zju.edu.cn;State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen 361005 (China). E-mail: nwchen@zju.edu.cn |
| |
| Abstract: | Probabilistic risk assessment (PRA) uses probability theory to quantify the probability of occurrence of an event. In this study, PRA was conducted for the discharge of excess nitrogen (N) from an agricultural (Jiulong River) watershed in Southeast China. Using fault tree analysis, a type of PRA, the probability of occurrence of excess N discharge into the river during a runoff event was evaluated both qualitatively and quantitatively. Land use maps, soil maps, fertilizer use records, and expert opinions were used to determine probabilities of individual events within the fault tree and to calculate the overall probability of excess N discharge during a runoff event. Qualitative analysis showed that the risk of excess N discharge was mainly related to crop and livestock practices in the watershed. Proper management of tillage, fertilizer, and manure was necessary to control N releases. Quantitative assessment results indicated that alternative practices including reduction of fertilization, installation of vegetative strip buffer around the pig farms, and installation of more riparian buffers along the Jiulong River could reduce the likelihood of N discharge through runoff. |
| |
| Keywords: | N discharge probabilistic risk assessment runoff watershed |
| 本文献已被 维普 万方数据 ScienceDirect 等数据库收录！ |
| 点击此处可从《土壤圈》浏览原始摘要信息 |
|
点击此处可从《土壤圈》下载全文 |
|
