| 三峡库区兰陵溪小流域径流氮磷输出及其降雨径流过程特征 |
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| 引用本文： | 张林,黄志霖,肖文发,曾立雄,宋文梅.三峡库区兰陵溪小流域径流氮磷输出及其降雨径流过程特征[J].环境科学,2018,39(2):792-799. |
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| 作者姓名： | 张林 黄志霖 肖文发 曾立雄 宋文梅 |
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| 作者单位： | 中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091,中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091;南京林业大学, 南方现代林业协同创新中心, 南京 210037,中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091,中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091,秭归县林业局, 宜昌 443600 |
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| 基金项目： | 国家科技支撑计划项目（2015BAD07B04）；国家自然科学基金项目（31370481） |
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| 摘 要： | 以三峡库区兰陵溪农林复合系统小流域为研究对象,对小流域氮磷流失量及其浓度进行连续监测,结合丰水期次降雨分析径流氮、磷输出变化特征及其响应过程.结果表明:(1)小流域雨季径流总量为50.92×10~4m~3,输出总氮载荷为52.43kg·hm~(-2),其中以硝态氮(30.26 kg·hm~(-2))和颗粒态氮(21.61 kg·hm~(-2))为主体,输出总磷为0.10 kg·hm~(-2);(2)降雨量分布具有阶段性特征,丰水期强降雨是土壤养分输出的主要驱动,其降雨径流贡献了雨季88%的总氮和90%的总磷流失;(3)小流域土壤养分氮、磷主要经由降雨形成地表径流过程输出,占养分总流失量的68%和74%;(4)降雨径流过程硝态氮浓度与径流量表现为负相关,养分输出主要在径流过程后期;径流的氨氮、总磷浓度与降雨量显著正相关,输出主要在径流过程前期;(5)雨季流域水体总氮浓度超标,降雨或非降雨期间均属劣Ⅴ类水质.
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| 关 键 词： | 三峡库区 退耕还林 面源污染 小流域 降雨径流 |
| 收稿时间： | 2017/6/30 0:00:00 |
| 修稿时间： | 2017/10/24 0:00:00 |
Characteristics of Nitrogen and Phosphorus Output in Runoff and Rainfall Runoff in Lanlingxi Watershed, Three Gorges Reservoir Area |
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| ZHANG Lin,HUANG Zhi-lin,XIAO Wen-f,ZENG Li-xiong and SONG Wen-mei.Characteristics of Nitrogen and Phosphorus Output in Runoff and Rainfall Runoff in Lanlingxi Watershed, Three Gorges Reservoir Area[J].Chinese Journal of Environmental Science,2018,39(2):792-799. |
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| Authors: | ZHANG Lin HUANG Zhi-lin XIAO Wen-f ZENG Li-xiong and SONG Wen-mei |
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| Institution: | Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China,Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China,Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China,Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China and Forestry Bureau of Zigui Country, Yichang 443600, China |
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| Abstract: | |
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| Keywords: | Three Gorges Reservoir Area returning farmland to forest non-point source pollution watershed rainfall and runoff |
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