关键词: 长江黄河源区, 水文序列, 气象序列, 周期分析

Abstract: We use the Meyer wavelet transform method that has being used extensively in Hydrology and in Meteorology, to analysis the periodic regularities of the annual precipitation, yearly average air temperature and annual runoff in the source regions of the Yangtze and Yellow rivers in this paper. The results show that the periods of average annual air temperature and yearly precipitation series in the source regions are accordant, and they varied periodically at 22 a, 16~17 a, 11 a, 7~8 a, 5~6 a and 2~3 a. They are just the periods of the sunspot activity and of the mutual action between sea and atmosphere. The relationship shows that the global movement influences the periodic variation in hydrology and meteorology of the study regions. Firstly, it directly influences the periodic variation of precipitation and air temperature, then influences the periodic variation of runoff based on the underlying surface.

Key words: source regions of Yangtze River and Yellow River, hydrological series, meteorological series, analysis on periodic variation