Variation rule of Sanhe Sluice discharge in recent 50 years
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Abstract:
Based on the monitoring data from 1964 to 2013 of Sanhe hydrology station, by linear trend method, moving average method, the cumulative anomaly and Morlet wavelet analysis method, explored the discharge variation of Sanhe Sluice for many years. The research results showed that the annual discharge of Sanhe Sluice shows downward trend in recent 50 years; the main period of Sanhe Sluice discharge changes is 30 years, the changes of cycle also exist for 6 years, 14 year time scales. The main period of flood season discharge changes is about 48 years, and 30 years is the second main cycle. There are also some small scales change periods of 5, 10 years. From 30 years of large cycle, the next 8 years the Sanhe Sluice will still at a relatively low water period. It is expected that the discharge begin to enter the relatively abundant water period in 2024, and the wet period will come to end around 2038.
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