Research summary · 2016
Spatio-Temporal Variation Analysis of Precipitation during 1960-2008 in the Poyang Lake Basin, China.
Long-term seasonal and annual precipitation trends, anomalies, and wavelet periods across the Poyang Lake Basin.
Research snapshot
How did seasonal and annual precipitation vary across the Poyang Lake Basin from 1960 to 2008?
17 rain stations · anomaly analysis · linear regression · Mann–Kendall test · continuous wavelet transform
Provides long-term evidence for basin-scale water-resources assessment, planning, and management.
Original post date: Oct 15, 2009 6:16:57 AM
Abstract
Long-term monthly precipitation data from 1960 to 2008 at 17 rain stations are analyzed to explore spatio-temporal variation of the seasonal and annual precipitation in the Poyang Lake basin, China, using anomaly analysis, simple linear regressive technique, Mann-Kendall trend test and Continuous Wavelet Transform. The results indicate that: (1) increasing precipitation trend is observed in summer and winter, while decreasing precipitation trend is identified in spring and autumn, and the above mentioned precipitation trends are not statistically significant; (2) changing trend of the areal average annual precipitation is non-significantly increasing, and increasing trend happens in almost the whole basin except in western and south-eastern small parts; (3) the spatial distribution of the seasonal and annual precipitation anomalies between 1991-2008 and 1960-2008 is similar to that of seasonal and annual precipitation trend during 1960-2008; (4) three main time-frequency distributions are observed in annual precipitation series during 1960- 2008, and they are 18 - 26 years, 8 - 14 years and 2 - 8 years, respectively; accordingly, there are three main periods in annual precipitation series, and they are 11-year, 22-year and 5-year respectively. This result will be helpful for further research on availability, scientific management and assessment of the water resources of the Poyang Lake basin.
Keywords: Precipitation, Poyang Lake Basin, Mann-Kendall Trend Test, Continuous Wavelet Transform
Cite this paper
Yuan, L. , Yang, G. , Li, H. and Zhang, Z. (2016) Spatio-Temporal Variation Analysis of Precipitation during 1960-2008 in the Poyang Lake Basin, China. Open Journal of Modern Hydrology, 6, 115-127. doi: 10.4236/ojmh.2016.62010.
2016 AAG Anual Meeting, San Francisco, CA. March 29 - April 2, 2016.