基于河南百泉泉域降水量的小波分析

文章利用1951—2016年百泉泉域降水量进行小波分析,揭示了百泉泉域不同时间尺度的降水特征,对百泉泉水流量的动态分析和百泉泉域裂隙岩溶地下水资源评价具有重要意义,也可为类似地区降水分析和资源评价提供参考。小波分析结果显示:(1)百泉泉域年降水量Z值为-2.49,总体呈下降的趋势,且趋势显著。春季降水量Z值为-0.01,降水量几乎无明显变化;夏季降水量Z值为-2.67,降水量明显减少,且趋势显著;秋、冬两季降水量Z值分别为-0.98和-0.95,降水量呈减少趋势,下降不显著。(2)年降水量和四季降水量存在多个主要周期变换。在大时间尺度内,年降水量和四季降水量震荡较强;而在小时间尺度内,秋、冬两季降水量震荡较强,突变点增多。(3)2016年百泉泉域为丰水期,但未来将步入枯水期。

Wavelet analysis based on the precipitation in Henan Baiquan spring area

The wavelet analysis on the 1951 ~ 2016 precipitation in the area of Baiquan spring reveals the characteristics of precipitation over there in different time scales,which not only is greatly significant for cuducting dynamic analysis on the Baiquan spring water flow and evaluation on local fissure karst groundwater resources, but also can provide reference for similar areas'' rainfall analysis and resource evaluation. Wavelet analysis results on Baiquan spring area shows that:(1) Baiquan springs precipitationZZvalue is -2.49, the overall precipitation apprears decreasing and the trend is significant.In spring,the precipitation Z value is -0.01with no obvious change;in summer, the precipitationZvalue is -2.67 and decreases significantly and the trend is obvious; in autumn and winter, the precipitationZ value are-0.98 and -0.95respectively, the precipitation still decreases but not obvious. (2) The annual precipitation and seasonal precipitation have several major cycle transformations. In the view of large time scale, the annual precipitation and the seasonal precipitation are more volatile; while in the small time scale, the precipitation in autumn and winter volate stronger with more breaking points.(3) Baiquan springs had its high water period of precipitation in the year 2016;from then on it enters into dry season.