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Shen Huanting, Wang Xiaochun, Yang Qingshu. The spectrum analysis of discharge and salinity in the Changjiang Estuary[J]. Haiyang Xuebao, 2000, 22(4): 17-23.
Citation:
Shen Huanting, Wang Xiaochun, Yang Qingshu. The spectrum analysis of discharge and salinity in the Changjiang Estuary[J]. Haiyang Xuebao, 2000, 22(4): 17-23.
Shen Huanting, Wang Xiaochun, Yang Qingshu. The spectrum analysis of discharge and salinity in the Changjiang Estuary[J]. Haiyang Xuebao, 2000, 22(4): 17-23.
Citation:
Shen Huanting, Wang Xiaochun, Yang Qingshu. The spectrum analysis of discharge and salinity in the Changjiang Estuary[J]. Haiyang Xuebao, 2000, 22(4): 17-23.
The spectrum analysis is applied to analyse the fluctuations of the discharge and salinity, the characteristics of correlation between salinity and discharge in the Changjiang Estuary.The results show that the quasi-periods of discharge include 4.0-8.0,2.0-3.0,1.5 a, 30-60 and 20 d; the quasi-periods of salinity are 5.0-10.0, 2.0-3.0,1.5,1.0, 0.5 a, 40.0-50.0,7.0-8.0 and 3.5 d.The spectrum structures of salinity in different typical hydrologic years are almost similar to those of discharge.The dominant quasi-periods of discharge and salinity are 1 a.The high-frequency vibration of salinity is stronger than that of discharge.The analysis also shows that the close correlation is existed between salinity and discharge, their correlation periods are 5.0-10.0, 2.0-3.0, 1.5,1.0 and 0.5 a.The low-frequency fluctuation of salinity is primarily affected by discharge and lags the fluctuation of discharge.
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