| 黄河源区玛曲县植被覆盖度及其气候变化研究 |
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| 引用本文： | 王兮之,梁钊雄,周显辉,王军.黄河源区玛曲县植被覆盖度及其气候变化研究[J].水土保持研究,2012,19(2):57-61,65. |
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| 作者姓名： | 王兮之 梁钊雄 周显辉 王军 |
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| 作者单位： | 1. 佛山大学资源环境系,广东佛山,528000
2. 兰州大学生命科学学院,兰州,730000 |
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| 基金项目： | 国家科技支撑计划项目(2009BAC53B01) |
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| 摘 要： | 以MODIS—NDVI遥感数据为基础,利用像元二分模型对玛曲县2000—2010年的植被覆盖度进行估算,对植被覆盖度的时空变化特征进行分析,并探讨了植被覆盖度与降水量和气温之间的响应关系。结果表明:近10a来玛曲县植被覆盖度变化呈明显波动起伏且总体略有增加趋势,高植被覆盖度和较高植被覆盖度的数量变化剧烈,中植被覆盖度、较低植被覆盖度和低植被覆盖度分布相对稳定;不同等级植被覆盖度在各乡范围及基于地形特征的空间分布差异十分显著;在年际与生长季的变化水平上,气温与降水量都对植被覆盖度有影响,其中气温比降水量的影响更加显著。
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| 关 键 词： | 玛曲县 MODIS—NDVI数据 植被覆盖度 气候变化 |
Vegetation Coverage and Climate Change of Maqu County in Source Region of Yellow River |
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| WANG Xi-zhi,LIANG Zhao-xiong,ZHOU Xian-hui,WANG Jun.Vegetation Coverage and Climate Change of Maqu County in Source Region of Yellow River[J].Research of Soil and Water Conservation,2012,19(2):57-61,65. |
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| Authors: | WANG Xi-zhi LIANG Zhao-xiong ZHOU Xian-hui WANG Jun |
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| Institution: | 1(1.Department of Resources and Environment,Foshan University,Foshan, Guangdong 528000,China;2.College of Life Science,Lanzhou University,Lanzhou 730000,China) |
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| Abstract: | The characteristics dynamic changes of vegetation cover were analyzed by using dimidiate pixel model and terrain data,as well as combining with climate changes of Maqu County of Yellow river based on MODIS-NDVI data from 2001 to 2010.The results indicated that vegetation cover was obviously fluctuated and a little increase trend in recent 10 years,and the high coverage and comparatively high coverage area undulated sharply,but the medium and comparatively low and low vegetation coverage areas kept stable.There were larger spatial variations of different vegetation cover types in terrain characteristic of each town.There were some influences of the temperature and the precipitation on the vegetation cover in growing season and year scale,but influence of temperature was much more significant than precipitation. |
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| Keywords: | Maqu County MODIS—NDVI data vegetation coverage climate change |
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