Relative Contribution of the Topographic Influence on the Triangle Approach for Evapotranspiration Estimation over Mountainous Areas
Joint Authors
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-11-05
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Evapotranspiration (ET) is an important component of the water budget.
Estimation ET through remote sensing over a mountainous terrain is typically obstructed by topographic effects.
In this paper, topographic corrections were applied to ET estimates using the surface-air temperature difference-Normalized Difference Vegetation Index (( T s - T a )-NDVI) triangle method with MODIS data for the Taihu Basin in China.
The effect of topography on ET was evaluated over an area with a complex terrain.
After applying the topographic correction, the results indicate that the ET decreased with elevation and slope.
The slope had a stronger impact on ET than the elevation, which caused the corrected ET to decrease by 90% from 6.8 mm day−1 to 0.6 mm day−1 for slopes over 50°.
On average, the corrected ET decreased by 10.4% and 32.1% for north- and south-facing slopes, respectively.
The ET corrected using the triangle method strongly depended on the evaporative fraction correction, which can mainly be attributed to the surface temperature correction.
We conclude that a topographic correction is necessary when the triangle method is applied to areas with a complex terrain.
American Psychological Association (APA)
Zhao, Xiaosong& Liu, Yuanbo. 2014. Relative Contribution of the Topographic Influence on the Triangle Approach for Evapotranspiration Estimation over Mountainous Areas. Advances in Meteorology،Vol. 2014, no. 2014, pp.1-16.
https://search.emarefa.net/detail/BIM-1015523
Modern Language Association (MLA)
Zhao, Xiaosong& Liu, Yuanbo. Relative Contribution of the Topographic Influence on the Triangle Approach for Evapotranspiration Estimation over Mountainous Areas. Advances in Meteorology No. 2014 (2014), pp.1-16.
https://search.emarefa.net/detail/BIM-1015523
American Medical Association (AMA)
Zhao, Xiaosong& Liu, Yuanbo. Relative Contribution of the Topographic Influence on the Triangle Approach for Evapotranspiration Estimation over Mountainous Areas. Advances in Meteorology. 2014. Vol. 2014, no. 2014, pp.1-16.
https://search.emarefa.net/detail/BIM-1015523
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1015523