干旱区生态环境知识资源中心(Arid): 利用SEBAL模型对沙拉沐沦河流域蒸散发的分析

Arid

	利用SEBAL模型对沙拉沐沦河流域蒸散发的分析
其他题名	Study on Evapotranspiration in the Shalamulun River Basin Using SEBAL Model and MODIS Data
	杨肖丽; 任立良; 袁飞; 雍斌; 江善虎
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2010
卷号	27 期号:4 页码:507-514
中文摘要	以2001年7月10日的MODIS数据为数据源, 采用基于地表热量平衡的SEBAL模型估算位于半干旱地区的沙拉沐沦河流域的实际蒸散发量, 综合分析蒸散发量与土地利用/覆被、地表温度、植被指数、高程、坡度和坡向的关系. 结果表明: 该流域的夏季日实际蒸散发量空间差异比较大, 从0 mm 到6.57 mm, 平均蒸散发约2.90 mm; 蒸散发的空间分布不均匀, 流域边缘林地覆盖区的蒸散发最高, 中部和流域出口所在的草地、耕地分布区相对较低. 实际蒸散发量与地表温度和归一化植被指数高度线性相关; 不同的土地利用类型具有不同的日平均蒸散发量, 林地的日平均蒸散发量最高, 其次为耕地, 建设用地最低.
英文摘要	Apart from rainfall and runoff, evapotranspiration (ET) including water evaporation from soil surface and vegetation transpiration represents a fundamental process of hydrological cycle and a key element of water resources management, particularly in semiarid and arid regions, because it affects the partition of energy and water fluxes over earth surface. ET is one of the important components of hydrological cycle in semiarid regions and cannot be directly measured. Estimate of regional ET is of a crucial need for climate studies, weather forecasts, hydrological surveys, ecological monitoring, and water resources management. Traditionally, ET is computed as a residual in water balance equations, from estimates of potential ET or, indirectly, from field measurements at meteorological stations. Recently, however, some researchers have begun to use scintillometers, RS data and hydrological models to estimate regional ET. The current study focuses on deriving daily actual ET values from Moderate Resolution Imaging Spectroradiometer (MODIS) images over the Shalmulun River Basin in Inner Mongolia, China. The SEBAL model based on the Surface Energy Balance Algorithm for Land is applied in this study. In this model, a small number of empirical relations are needed only, and there are also many other advantages. In the SEBAL model, surface albedo, NDVI and surface temperature could be derived from RS data. Semi-empirical relationships are used to estimate the emissivity from Normalized Difference Vegetation Index (NDVI). The atmospheric transmittance and atmospheric emissivity could be estimated from meteorological data, such as air temperature and humidity. Elevation, slope and aspect of land surface could be extracted and computed from the digital elevation model (DEM). Landsat Enhanced Thematic Mapper Plus (ETM+) images in July 6, 2001 are used to detect the land use/cover types in the study area. The spatial distribution of daily ET in the study area is estimated. In addition, the effects of surface temperature, NDVI, elevation, slope, aspect and land use/cover types on ET in the Shalamulun River Basin are quantified by using the spatial analysis of ArcGIS. The results are as follows: (1) SEBAL model is used to produce the best ET estimates for semiarid environment from MODIS image; (2) Spatial distribution of ET is uneven in the Shalamulun River Basin, the daily ET estimated from satellite data in this study in the drainage basin ranges from 0 mm to 6.57 mm, and 2.90 mm in average; (3) Actual ET has a strong index correlation with surface temperature and NDVI, and there are not obvious direct relationships between ET and elevation, slope and aspect; and (4) ET is different from different land use types and in an order of forest > farmland > grassland > barren land > construction land.
中文关键词	蒸散发量 ; 空间分布 ; SEBAL模型 ; 植被指数 ; 土地利用类型 ; 沙拉沐沦河流域 ; 半干旱区
英文关键词	evapotranspiration spatial distribution SEBAL model vegetation index land use type Shalamulun River Basin semiarid region
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Geology
WOS研究方向	Geology
CSCD记录号	CSCD:3919826
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225076
作者单位	杨肖丽, 河海大学, 水文水资源与水利工程科学国家重点实验室, 南京, 江苏 210098, 中国.; 任立良, 河海大学, 水文水资源与水利工程科学国家重点实验室, 南京, 江苏 210098, 中国.; 袁飞, 河海大学, 水文水资源与水利工程科学国家重点实验室, 南京, 江苏 210098, 中国.; 雍斌, 河海大学, 水文水资源与水利工程科学国家重点实验室, 南京, 江苏 210098, 中国.; 江善虎, 河海大学, 水文水资源与水利工程科学国家重点实验室, 南京, 江苏 210098, 中国.
推荐引用方式 GB/T 7714	杨肖丽,任立良,袁飞,等. 利用SEBAL模型对沙拉沐沦河流域蒸散发的分析[J],2010,27(4):507-514.
APA	杨肖丽,任立良,袁飞,雍斌,&江善虎.(2010).利用SEBAL模型对沙拉沐沦河流域蒸散发的分析.干旱区研究,27(4),507-514.
MLA	杨肖丽,et al."利用SEBAL模型对沙拉沐沦河流域蒸散发的分析".干旱区研究 27.4(2010):507-514.