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Proceedings Paper

Spatial-temporal variations of evapotranspiration in the upper Huaihe River basin
Author(s): Qiongfang Li; Meixiu Yu; Yunhong Xue; Peng Li; Bin You
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Paper Abstract

Evapotranspiration, which is an important component of water cycle, is a critical variable in determination of local water resources available. This paper selected the upper Huaihe River as case study site. The daily reference evapotranspiration was computed by the Penman-Monteith method, and then the mean annual reference evapotranspiration (ETref), the decadal average values of annual ETref and the decadal average values of annual seasonal ETref were calculated and mapped. The results revealed that the spatial distribution of mean annual ETref was uneven with a clearly decreasing gradient in the mean annual ETref from the east to the west; The spatial and temporal distribution of decadal average values of annual ETref varied with decades and from 1960s to 1980s , there existed a decreasing trend with an increasing trend from 1980s to 1990s; The spatial and temporal distribution of decadal averages of annual seasonal ETref varied with seasons and decades. The decadal average in spring decreased with decades, while the value in summer had a decreasing trend from 1960s to 1980s with an increasing trend in 1990s compared with 1980s, and the decadal averages both in autumn and winter increased from 1960s to 1970s then decreased in 1980s with an increasing trend in 1990s compared with 1980s. The output of this paper provides a valuable reference for the forecast of future water resource available and the sustainable development and utilization of water resources in the Huaihe river basin.

Paper Details

Date Published: 15 October 2009
PDF: 9 pages
Proc. SPIE 7492, International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining, 749212 (15 October 2009); doi: 10.1117/12.838700
Show Author Affiliations
Qiongfang Li, Hohai Univ. (China)
Meixiu Yu, Hohai Univ. (China)
Yunhong Xue, Bureau of Xinyang Hydrology and Water Resources Survey (China)
Peng Li, Bureau of Xinyang Hydrology and Water Resources Survey (China)
Bin You, Bureau of Xinyang Hydrology and Water Resources Survey (China)


Published in SPIE Proceedings Vol. 7492:
International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining

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