基于方差线谱的水文时间序列周期分析

Analysis of Hydrological time series cycle based on variance line spectrum

水文资料在地方水利建设、防洪减灾、水资源管理等方面具有重要作用。由于许多地区缺少长时间序列水文资料,因此在涉水工程研究中,往往需要对水文序列进行模拟和延长,周期识别是其中一个非常关键的步骤,方差线谱法(即周期图法)是周期识别的一种重要方法。本文通过对长江上游某水文站流量时间序列的周期识别,阐述了方差线谱分析在水文时间序列模型中的应用。

The hydrological data plays an important role in the local water conservancy constructlon,flood control ,water resources management.Due to the lack of long sequences of hydrological data in many areas ,so in hydraulic engineering studies ,to simulate the hydrological sequence and extended ,cycle recognition is one of the crucial steps,variance line spectroscopy（that is periodogram） is a cycle an important method of identification.Through a cycle of recognition of upper Yangtze River Hydrological Station traffic time series line spectrum analysis of variance,it explained the application of variance line spectrum in hydrological time series model.