| 1995—2014年北洛河流域植被恢复的地形分布特征 |
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| 引用本文： | 闫瑞,张晓萍,闫胜军,赵文慧.1995—2014年北洛河流域植被恢复的地形分布特征[J].东北大学学报(自然科学版),2016,37(11):1598-1603. |
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| 作者姓名： | 闫瑞 张晓萍 闫胜军 赵文慧 |
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| 作者单位： | ( 1. 西北农林科技大学 土壤侵蚀与旱地农业国家重点实验室， 陕西 杨凌712100； 2. 中国科学院 水利部， 陕西 杨凌712100； 3. 北京师范大学 水环境模拟国家重点实验室， 北京100875) |
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| 基金项目： | 国家自然科学基金资助项目 (41440012，41230852，41101265);中科院重点部署项目(KZZD-EW-04-03-03);中科院知识创新项目(KZCX2-XB3-13). |
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| 摘 要： | 以1995， 2007和2014年Landsat TM影像为数据源，计算归一化植被指数(NDVI)，分析退耕还林政策下北洛河流域植被的恢复程度.结果表明，流域三年平均植被覆盖度分别为:46.4%， 63.4%和73.4%.上游吴起、志丹等县所在丘陵沟壑区增加态势最明显，三年平均植被覆盖度分别为20.2%， 41.64%， 51.2%.系统分析流域上游丘陵沟壑区植被恢复在地形上的趋势变化.结果表明:不同高程、坡度和坡向分布带上均表现出植被覆盖度随着时间进展呈现明显好转态势.
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| 关 键 词： | 植被恢复 覆盖度 地形因子 北洛河 丘陵沟壑区 |
Topographical Distribution Characteristics of Vegetation Restoration in the Beiluo River Basin from 1995 to 2014 |
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| YAN Rui,ZHANG Xiao-ping,YAN Sheng-jun,ZHAO Wen-hui.Topographical Distribution Characteristics of Vegetation Restoration in the Beiluo River Basin from 1995 to 2014[J].Journal of Northeastern University(Natural Science),2016,37(11):1598-1603. |
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| Authors: | YAN Rui ZHANG Xiao-ping YAN Sheng-jun ZHAO Wen-hui |
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| Institution: | 1.State Key Laboratory of Soil Erosion and Dry land Farming in Loess Plateau， Northwest A & F University， Yangling 712100， China; 2.Institute of Soil and Water Conservation， Chinese Academy of Sciences， Yangling 712100， China; 3.Key Laboratory for Water and Sediment Sciences of Ministry of Education， Beijing Normal University， Beijing 100875， China. |
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| Abstract: | Taking the Beiluo river basin as an example， the Landsat TM image data in 1995， 2007 and 2014 were employed and the vegetation coverage was derived to analyze how the vegetation restored.The results showed that the average vegetation coverage in the three years of the whole basin are 46.43%， 63.42%， and 73.4%， respectively. The trends of vegetation distribution on landform were analyzed in the upper reaches of the basin. It is showed that whatever the elevation belts， slope gradient spans， and slope aspect zones were， the vegetation coverage improved distinctively in 1995， 2007 and 2014. Meanwhile， the extent or the area of low vegetation coverage transforming to high vegetation coverage tends to be greater with the elevation lower， slope gradient larger， and slope aspect inclining to be shady. |
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| Keywords: | vegetation restoration vegetation coverage landform factors Beiluo river loess hilly gully region |
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