巩义市煤炭矿区降水时空分布特征分析

Spatial-Temporal Distribution of Precipitation in Gongyi Coal Mining Area

结合巩义市1981-2015年降水资料,运用线性倾向估值法、Mann-Kendall非参数检验以及小波分析等统计学分析方法,对采煤矿区降水分布特征、演变趋势进行分析;结果表明:降水高度集中于夏季,秋季次之,冬春季节降水几乎为0,降水量年内分配极不均匀;全年降水量的减少主要由夏季降水量的减少造成;小波分析得出:降水振荡周期为2 a和32 a,在未来一段时间里,巩义市将处于降水减少的时期。由于矿区地层为寒武系以及奥陶纪灰岩,岩溶裂隙发育,夏季降水丰沛,极易下渗造成井下淹水。

Based on the precipitation data from 1981 to 2015 in Gongyi,the distribution characteristics and evolution trend of precipitation in coal mining area are analyzed by using linear tendency estimation,Mann-Kendall nonparametric test and wavelet analysis the results show that the precipitation is highly concentrated in summer,followed by autumn,nearly zero in winter and spring,and the annual precipitation distribution is very uneven the wavelet analysis shows that the oscillation periods of precipitation are 2 a and 32 a,and in the future,Gongyi will be in the period of decreasing precipitation.Because the strata in the mining area are Cambrian and Ordovician limestone,the karst fissure is developed,the precipitation is abundant in summer,and the underground water is easily flooded.