摘要
基于MODIS遥感数据,应用表面能量平衡系统对柴达木盆地都兰河希赛区2001—2011年的区域蒸散量进行了计算,并分析了其影响因素。结果表明:都兰河希赛区11 a间的年蒸散量呈逐渐增长趋势,由2001年的94.61 mm增加到2011年的266.80 mm;都兰河希赛区的蒸发系数为0.115;区域蒸散量与气温、降水、相对湿度等气象因子呈正相关关系,复相关系数分别为0.659、0.635、0.543;区域蒸散量随着地表植被指数的增大而增大,随着地下水位埋深的增加而减小。
Based on MODIS data, the annual evapotranspiration of Xisai subregion was estimated during the period of 2001--2011 using Surface Energy Balance System and the impact factors of ET were also analyzed in this paper. The results indicate that： a）The annual evapo-transpiration increases between this 11 years and it increases from 94.61 mm of 2001 to 266.80 mm of 2011; b）The evaporation coefficient of Xisai Subregion of Dulan River is 0.115 ; c）The annual evapotranspiration is positive correlation with air temperature, precipitation and relative humidity, the cor- relation coefficients are 0.659, 0.635 and 0. 543, respectively; d） The annum evapo-transpiration increases with NDVI increase and it decreases with the groundwater deoth.
出处
《人民黄河》
CAS
北大核心
2014年第4期50-52,88,共4页
Yellow River
基金
国家自然科学基金资助项目(41372250)
关键词
表面能量平衡原理
MODIS
驱动因子
分布特征
蒸散量
都兰河希赛区
surface energy balance system
MODIS
driving factors
distribution characteristics
evapo-transpiration
Xisai sub-region
