Analysis of Spatial Distribution and Temporal Trend of Potential Evapotranspiration in Hexi Corridor

Y. M. Wang, D. F. Peng, X. Y. Guo, H. Huo, O. Cheng, L. L. Tong, D. S. Hu

2018

Abstract

In this paper, the FAO Penman-Monteith (FAO-56 PM)model are evaluated to estimate daily potential evapotranspiration (PET) values, at 14 meteorological stations during 1960-2011 in the Hexi Corridor in China are calculated. Using GIS spatial analysis techniques and mathematical statistical theory to analyzed temporal and spatial characteristics of potential evapotranspiration in Hexi Corridor. Their spatial distributions and temporal variations are examined and the causes for the variations are discussed. The contributions of various meteorological variables to the temporal trend detected in the PET is then determined. The results show that: (i) The annual PET showed a mixed pattern of upward and downward trend during 1960-2011 in Hexi Corridor. The trends in the seasonal changes were particularly strong in summer and spring, whereas the increase is in summer. (ii) The potential evapotranspiration was decreased from northwest to southeast in Hexi Corridor, the minimum were in the Qilian Mountains. The potential evapotranspiration mainly concentrated in the spring and summer, account for 30% and 40% in potential evapotranspiration, respectively, autumn followed and winter was minimum. (iii) The main factor effect potential evapotranspiration of Hexi Corridor was wind speed, which effect the spring potential evapotranspiration was temperature.

Paper Citation

in Harvard Style

Wang Y., Peng D., Guo X., Huo H., Cheng O., Tong L. and Hu D. (2018). Analysis of Spatial Distribution and Temporal Trend of Potential Evapotranspiration in Hexi Corridor.In Proceedings of the International Workshop on Environmental Management, Science and Engineering - Volume 1: IWEMSE, ISBN 978-989-758-344-5, pages 102-110. DOI: 10.5220/0007557601020110

in Bibtex Style

@conference{iwemse18,
author={Y. M. Wang and D. F. Peng and X. Y. Guo and H. Huo and O. Cheng and L. L. Tong and D. S. Hu},
title={Analysis of Spatial Distribution and Temporal Trend of Potential Evapotranspiration in Hexi Corridor},
booktitle={Proceedings of the International Workshop on Environmental Management, Science and Engineering - Volume 1: IWEMSE,},
year={2018},
pages={102-110},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007557601020110},
isbn={978-989-758-344-5},
}

in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Environmental Management, Science and Engineering - Volume 1: IWEMSE,
TI - Analysis of Spatial Distribution and Temporal Trend of Potential Evapotranspiration in Hexi Corridor
SN - 978-989-758-344-5
AU - Wang Y.
AU - Peng D.
AU - Guo X.
AU - Huo H.
AU - Cheng O.
AU - Tong L.
AU - Hu D.
PY - 2018
SP - 102
EP - 110
DO - 10.5220/0007557601020110