人民珠江2025，Vol.46Issue(7)：53-60,8.DOI:10.3969/j.issn.1001-9235.2025.07.006
基于小波变换-SG滤波融合算法的平寨水库场次洪水反推入库流量去噪研究
Denoising of Inflow of Pingzhai Reservoir Based on Fusion Algorithm of Wavelet Transform and Savitzky-Golay Filter
摘要
Abstract
In response to abnormal fluctuations of water flow in the shape of a"sawtooth"in the reverse inference of water balance,a wavelet transform Savitzky-Golay filter fusion algorithm was proposed.The algorithm first performed wavelet decomposition and threshold denoising preprocessing on the research data by setting different parameter combinations.Wavelet basis functions and decomposition levels were then selected.Based on this,the Savitzky-Golay filter was used to perform secondary denoising on the preprocessed data,to further eliminate residual low-level noise and improve the overall smoothing effect.Finally,the inverse wavelet transform was employed to reconstruct the complete signal process.The window length and polynomial order were further optimized through denoising evaluation indicators to achieve wavelet transform Savitzky-Golay filter fusion denoising.This method was applied to the historical flood events of Pingzhai Reservoir to infer the inflow,and the relative error of flood peak,peak time difference,and smoothness were set as evaluation indicators.According to the results,compared with the five point three order smoothing method,sliding average method,and wavelet threshold denoising method,the wavelet transform SG filtering fusion algorithm significantly improves the smoothness and denoising effect while ensuring the characteristics of the reverse flow peak information of the inflow.The research results are of great significance for the refined management and optimized operation of Pingzhai Reservoir and serve as a reference for similar projects.关键词
入库流量/锯齿状/平滑去噪/小波阈值去噪法/小波变换-SG滤波融合算法Key words
inbound traffic/zigzag/smooth denoising/wavelet threshold denoising method/wavelet threshold denoising method/fusion algorithm of wavelet transform and Savitzky-Golay filter分类
建筑与水利引用本文复制引用
高林,宋金伟,李作孝..基于小波变换-SG滤波融合算法的平寨水库场次洪水反推入库流量去噪研究[J].人民珠江,2025,46(7):53-60,8.基金项目
贵州省水利厅科技专项经费项目资助(KT202308) （KT202308）
