基于小波变换的年径流序列的模拟

根据黄河三门峡（陕县）站实测39年的年径流量序列，本文利用小波变换把实测序列分解成高频部分和较为光滑部分，对不同部分进行分析后，结合AR（1）模型进行模拟，再用小波变换重构算法进行重构，重构的模拟序列的统计特征参数表明，利用小波变换结合AR（1）模型模拟的水文序列与原序列的统计特征参数较为接近，是一个较好的模拟水文序列的方法。

Simulation of Annlual Runoff Sequences on the Basis of Wavelet Transform

Based on thirty-nine years'annual runoff sequences of Sanmenxia Hydlnlogy Station on the Yellow River, this paper uses the wavelet transform to decomope the actually measured se-quences into the high-freqency and smoother parts. Alter analysing the different parts, this paper has made a simulation, comining with AR(1) medel, and rearranged them by the reaLranging cal-culating method. The case of simulation shows that the statistic characteristic paramter of thehydrologic sequences by combining wavelet transform with AN(1) moclel is closer to the original one. As a result, such simulation is a better method of simulating hydrologic runoff sequences.