云南抚仙湖流域年降水量时空分布特征研究

Study on spatial and temporal distribution feature of annual precipitation over Fuxian Lake Basin in Yunnan Province

抚仙湖是全国第二深淡水湖泊,同时也是云南省重要战略水源地,流域降水量的时空分布影响着湖泊的水量及水质状况。采用数理统计、趋势法、小波分析等方法,分析了抚仙湖流域年降水量的时空变化、地区分布,以及年内、年际、丰枯、多年变化趋势,揭示了该流域年降水量的时空变化特征。研究结果可为实现高原湖泊资源的可持续利用提供技术支持。

Fuxian Lake is the second deepest fresh lake in China,and one of the most important strategic water source for Yunnan Province. The water volume and quality of Fuxian Lake are affected by the spatial and temporal distribution of precipitation over the basin. The methods of mathematical statistics,climate trend coefficient and wavelet transform were employed to analyze the temporal and spatial variation and regional distribution of the annual precipitation in the basin. Meanwhile,the variation trend of intra- annual,inter- annual,flood and dry season,and multi- year precipitation were described. The results reveal the characteristics of spatial and temporal variations of the annual precipitation in the basin,providing technical reference for sustainable exploration of lake resources in plateau.