cje
Previous Articles Next Articles
WANG Qiong, ZHANG Ming-jun**, PAN Shu-kun, MA Xue-ning, LI Fei, LIU Wen-li
Online:
Published:
Abstract: Based on the daily meteorological data from 116 meteorological stations in the Yangtze River basin of China in 1961-2011, and by using the Penman-Monteith method recommended by the FAO, this paper calculated the potential evapotranspiration in the basin. In the meantime, the methods of inverse distanceweighted interpolation, MannKendall mutation test, Morlet wavelet analysis, and rescaled range analysis were adopted to study the spatiotemporal variation patterns of the potential evapotranspiration. In recent 51 years, the inter-annual change tendency rate of the potential evapotranspiration in the whole basin was -0.34 mm·a-1. Spatially, the potential evapotranspiration had an increased trend after an initial decrease from west to east. Temporally, the potential evapotranspiration presented an obvious increasing trend in autumn, but a decreasing trend in spring, summer, and winter, with an overall tendency of summer > autumn > spring > winter. The M-K mutation test and Morlet wavelet analysis showed that the yearly potential evapotranspiration mutation happened around 1980, and the departure sequence vibration of the potential evapotranspiration frequency was primary quasi 12 years and secondary quasi 4 years. The rescaled range analysis showed that except precipitation, all the test climate factors had the same variation trend with the potential evapotranspiration as that in the past.
Key words: indicators of hydrological alteration (IHA), eco-hydrology, change of water regime, the Three Gorges Reservoir, three outfalls of Chingjiang River.
WANG Qiong, ZHANG Ming-jun**, PAN Shu-kun, MA Xue-ning, LI Fei, LIU Wen-li. Spatiotemporal variation patterns of potential evapotranspiration in the Yangtze River basin of China.[J]. cje.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: https://www.cje.net.cn/EN/abstract/abstract20513.shtml
https://www.cje.net.cn/EN/Y2013/V32/I5/1292