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3 November 2010Multiscale study on the spatial heterogeneity of remotely-sensed evapotranspiration in the typical Oasis of Tarim Basin
Time series of regional evapotranspiration (ET) of the typical oasis in the Tarim Basin were investigated and
calculated by integrating remotely sensed surface parameters into the improved Surface Energy Balance Algorithm for
Land (SEBAL) model. The distributed average and maximum daily actual ET was calculated based on the instantaneous
ET, corresponding to oasis vegetation types for investigating the relationships between spatial difference of actual ET
and land cover types in arid environment. Different land cover types and surface water conditions in the Keriya Oasis
can be distinguished obviously in NDVI-LST feature space and characterized by the Temperature Vegetation Dryness
Index (TVDI). Lacunarity index was employed to determine heterogeneity and spatial patterns of ET landscape in the
Keriya Oasis by using RS and GIS techniques. Spatially distributed scale-dependent regularities of land cover types
across a range of patch sizes were revealed by changes of lacunarity curves. It is explicitly suggested that lacunarity
index is quite effective to quantify the scale-dependent ET spatial heterogeneity and useful to figure out the water use
pattern of oasis-desert landscape.
Chuansheng Liu andWanchang Zhang
"Multiscale study on the spatial heterogeneity of remotely-sensed evapotranspiration in the typical Oasis of Tarim Basin", Proc. SPIE 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications, 78411A (3 November 2010); https://doi.org/10.1117/12.873256
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Chuansheng Liu, Wanchang Zhang, "Multiscale study on the spatial heterogeneity of remotely-sensed evapotranspiration in the typical Oasis of Tarim Basin," Proc. SPIE 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications, 78411A (3 November 2010); https://doi.org/10.1117/12.873256