Medium and long term hydrologic forecasting method based on empirical mode decomposition
A technology of empirical mode decomposition and hydrological forecasting, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., and can solve the problem of low prediction accuracy
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[0071] Such as figure 1 A medium- and long-term hydrological forecasting method based on empirical mode decomposition is shown, including the following steps:
[0072] Step 1. Establishment of the hydrological forecast model, using data processing equipment to establish the hydrological forecast model of the predicted watershed, the process is as follows:
[0073] Step 101, Empirical Mode Decomposition: Call the Empirical Mode Decomposition module to perform empirical mode decomposition on the hydrological time series s(t) of the predicted watershed, and obtain n eigenmode function components F j and a trend term r n , and n eigenmode function components F j and a trend term r n are discrete functions.
[0074] in, And it contains the measured annual runoff data of the predicted basin for M consecutive years, (y 0 +i) is the year and y 0 is the initial year, is the i-th annual runoff data in the hydrological time series s(t) and it is the year (y 0 +i) measured annu...
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