基于SEBAL模型的老哈河流域蒸散发研究  

Estimating Evapotranspiration in Laoha River Basin Using SEBAL Model

作　　者：杨肖丽[1] 任立良[1] 雍斌[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《水电能源科学》2010年第1期9-11,共3页Water Resources and Power

基　　金：国家重点基础研究发展计划(973)基金资助项目(2006CB400502);高等学校学科创新111引智计划基金资助项目(B08048)

摘　　要：针对传统的蒸散发计算方法存在的不足,采用基于地表热量平衡的SEBAL模型,利用1 km分辨率的MODIS影像数据估算了位于半干旱地区的老哈河流域的实际蒸散发量及其时空分布特征,并综合分析了蒸散发量与土地利用、土地覆被、地表温度、植被指数、高程、坡度的关系。结果表明,该流域蒸散发时空分布不均匀,且实际蒸散发与地表温度呈指数相关,与归一化植被指数和高程等参数呈线性相关。该方法可为国内半干旱地区的实际蒸散发研究提供参考。According to the shortcomings of the traditional method of calculating evapotranspiration, the SEBAL model based on surface heat balance is used to estimate the actual evapotranspiration and its temporal and spatial distribution characteristics of the Laoha River Basin located in semiarid region using 1 km resolution MODIS image data. The relationship of land utilization, land cover, surface temperature, vegetative index, elevation and slope with evapotranspiration is also analyzed. The results show that the temporal and spatial distribution of evapotranspiration are nonuniform. The actual evapotranspiration has the strong index correlation with the land surface temperature, and has liner correlation with NDVI and elevation et al. Therefore, the proposed method provides reference for studying actual evapotranspiration in domestic semiarid region.

关 键 词：蒸散发 半干旱地区 SEBAL模型 MODIS数据 老哈河流域 

分 类 号：P332.2[天文地球—水文科学] TP79[水利工程—水文学及水资源]