| 诺敏河流域植被覆盖时空演变及其与径流的关系研究 |
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| 引用本文： | 史晓亮,李颖,赵凯,朱红雷.诺敏河流域植被覆盖时空演变及其与径流的关系研究[J].干旱区资源与环境,2013(6):54-60. |
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| 作者姓名： | 史晓亮 李颖 赵凯 朱红雷 |
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| 作者单位： | 中国科学院东北地理与农业生态研究所;中国科学院研究生院 |
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| 基金项目： | 中国科学院重大碳专项项目(XDA05060400)资助 |
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| 摘 要： | 基于GIMMS/NDVI数据对诺敏河流域1982-2006年间植被覆盖的时空演变特征进行了研究,并结合SCS模型模拟地表径流,在流域和像元尺度分析植被NDVI变化与径流的关系。研究表明:诺敏河流域植被NDVI值较高,但25a间整体呈下降趋势,NDVI减少的区域占总面积的82.5%,植被覆盖有所降低;NDVI空间差异明显,NDVI的高值区主要分布在中上游林区,而耕地分布较多的下游地区NDVI值相对较低。流域尺度上植被NDVI与径流不具有明显的相关性。但从像元尺度来看,植被NDVI和径流的正相关和负相关共存,流域不同空间位置的植被变化与径流的关系并不一致。
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| 关 键 词： | 植被NDVI SCS模型 径流 相关关系 诺敏河流域 |
Temporal and spatial changes of vegetation cover and the relationship with runoff in Nuomin river basin |
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| SHI Xiaoliang,LI Ying,ZHAO Kai,ZHU Honglei.Temporal and spatial changes of vegetation cover and the relationship with runoff in Nuomin river basin[J].Journal of Arid Land Resources and Environment,2013(6):54-60. |
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| Authors: | SHI Xiaoliang LI Ying ZHAO Kai ZHU Honglei |
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| Institution: | 1,2(1.Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,P.R.China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,P.R.China) |
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| Abstract: | On the basis of GIMMS/NDVI during 1982-2006,the temporal and spatial changes of vegetation cover were studied in the Nuomin river basin.Combined with simulation results of annual runoff with SCS model,the relationship between vegetation NDVI and runoff in the watershed and pixel scale was analyzed.The results indicated that the vegetation NDVI was high,but the mean annual NDVI decreased from 1982 to 2006.The area in which vegetation NDVI decreased accounted for 82.5% the whole watershed,the vegetation degraded a little.The vegetation NDVI had obvious spatial variability.Forest was the principal vegetation type in the upper and middle reaches of the basin,where the vegetation NDVI was higher.The NDVI of farmland mainly distributed in the downstream was relatively smaller.In the watershed scale,the vegetation NDVI did not have clear correlation with runoff.But in the scale of pixel,the vegetation NDVI had both positive and negative correlation with runoff estimated with SCS model.The correlations between vegetation and runoff are not uniform in different areas of basin. |
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| Keywords: | vegetation NDVI SCS model runoff correlation Nuomin river basin |
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