艾比湖流域径流变化特征分析——以精河为例

Research on Runoff Characteristics in the Ebinur Lake Basin——The Case Study of Jinghe River

利用精河水文站1964—2012年径流数据，采用变异系数、集中度、集中期和小波分析方法，对艾比湖流域精河的径流量在多时间尺度上进行分析。结果显示，精河径流年际变化较平稳，增长趋势不明显；精河流域径流主要集中在6～8月，季节上主要集中在夏季。径流集中期主要集中在6月下旬至7月中旬之间。应用小波分析发现精河年径流集中度变化具有明显的阶段性与周期性。径流集中度呈现15年、8年、4年、2年左右的显著周期性变化。

Based on the annual runoff data of Jinghe Hydrological Station from 1964 to 2012 in Jinghe River, the runoff on the multiple time scales were analyzed by indices of variation coefficient, concentration degree, concentration period and wavelet analysis in Aibihu basin. The results show that runoff series increased insignificantly; runoff mainly occurs during June-August, mainly concentrated in summer, runoff main- ly concentrated in late June to mid-July, and shows that the annual runoff of concentration period holds obvious quasi-periodic oscillations. The primary periods were 15, 8, 4 and 2 years, respectively.