| 积雪和植被高程分布的相关性——以羊八井流域为例 |
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| 引用本文： | 高洁,傅旭东,王光谦,巩同梁,王皓. 积雪和植被高程分布的相关性——以羊八井流域为例[J]. 应用基础与工程科学学报, 2011, 0(Z1): 37-48 |
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| 作者姓名： | 高洁 傅旭东 王光谦 巩同梁 王皓 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室;西藏自治区水利厅; |
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| 基金项目： | 科技部“十一五”科技支撑计划(2007BAC06B06) |
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| 摘 要： | 基于2003—2008年空间分辨率500m的MOD IS雪产品和植被产品数据提取了拉萨河羊八井流域(2665km2)的积雪-高程和植被-高程曲线.研究发现,在积雪植被敏感变化带[4800m,6000m]内,随着高程增加,积雪覆盖率呈非线性的"S"型递增趋势,植被变化则呈现反向的"S"型曲线,并且两者斜率变化的拐点分别位于相邻的高程带内[5600m,5800m]和[5400m,5600m].这一现象进一步验证了中尺度(100m—10km)积雪和植被的密切相关性,表明积雪-高程和植被-高程关系可以互为指示作用.
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| 关 键 词： | 积雪覆盖率 羊八井 积雪-植被-高程 MODIS产品 |
Correlations Between Snow,Vegetation and Elevation in Yangbajain,Lhasa River Basin |
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| GAO Jie,FU Xudong,WANG Guangqian,GONG Tongliang,WANG Hao. Correlations Between Snow,Vegetation and Elevation in Yangbajain,Lhasa River Basin[J]. Journal of Basic Science and Engineering, 2011, 0(Z1): 37-48 |
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| Authors: | GAO Jie FU Xudong WANG Guangqian GONG Tongliang WANG Hao |
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| Affiliation: | GAO Jie1,FU Xudong1,WANG Guangqian1,GONG Tongliang2,WANG Hao1 (1.State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China,2.Tibet Bureau of Water Resources,Lhasa 850000,China) |
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| Abstract: | Based on MODIS product from 2003 to 2008 with a spatial resolution of 500m and temporal resolution of eight days,snow-covered area and snow depletion curves in different elevation zones are extracted for the Yangbajain catchment of the Lhasa River Basin in China.Snow-cover percentage increases as elevation increases.The positive relation between snow cover and elevation results in an S shape with inflection point at about 5600 and 5800m.Similarly,the MODIS vegetation product also demonstrates an S pattern,b... |
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| Keywords: | snow-covered area Yangbajain snow-vegetation-elevation MODIS product |
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