干贮粉煤灰降水渗透深度的统计分析

根据某热电厂贮灰场模拟降水30 mm、50 mm、100 mm和150 mm的试验数据,采用统计方法分析不同降水强度下粉煤灰随着降水渗透至地下的深度,以确定各种降水条件下贮灰场渗滤液是否能够达到含水层,造成地下水污染。运用箱线图直观了解不同降水量下含水量发生显著性变化的土层深度,进一步使用秩和检验方法,利用本底值与降水影响情况下样本土壤含水量数值进行比较分析。结果表明,在0.1显著性水平下,污染液不能达到含水层。

Statistical analysis on seepage depth of dry ash

In order to make sure whether ash seepage liquid under different precipitation can reach aquiclude and pollute groundwater，based on the test data under simulated precipitation of 30mm，50mm，100mm and 150mm of an ash disposal area in a thermal power plant，we applied statistical methods to analyze the pollution depth of dry ash under different precipitation． Firstly，the soil thickness of significant change of soil water content can be learned under different precipitation by boxplot． Moreover，the method of rank sum test is applied to com- pare the difference between background numerical value and soil water content under different precipitation． The results imply that polluted liquid can not immerge in groundwater on the significant level of 0. 1．