小波水文分析在年降水量分析中的应用

Application of wavelet hydrological analysis in annual precipitation analysis

水文工作一项重要任务就是对相关要素进行中、长期水文预报,目前采用的方法一般为参数估计法、多元回归法、线性相关法等。应用小波水文分析理论,探讨降水量时间序列的多时间尺度变化特征,寻找出降水量时间序列不同时间尺度下的演变规律和发展趋势,从而为降水量的中、长期预测提供分析依据。

An important task of the hydrology is the medium and long term hydrological forecasting for the hydrological factors. At present, the methods of the parameter estimation, the multiple regression and linear correla tion are used generally. Based on the theory of the wavelet hydrological analysis, the paper discusses the variation characteristics of the multiple time scales of the precipitation time series and finds out the evolution and trends of precipitation time series at the different time scales, which could provide the analysis basis for the medi um and long term forecasting of the precipitation.