【摘要】 利用1961—2008年贵州75个测站逐日12 h降水资料,分析了48 a来贵州暴雨的时空分布特征。结果表明:全省多(少)暴雨区与年暴雨量、年降水量多(少)值区的分布一致;年暴雨量占年雨量的12%～32%;年暴雨日数1.6～4.9 d;年暴雨日数、夏季暴雨日数呈上升趋势,春秋两季暴雨日数呈减少趋势;暴雨的季节分布呈明显的"单峰型",6月是暴雨最集中的时段;夜间暴雨多、白天暴雨少。更多还原

【Abstract】 The spatial and temporal characteristics of rainstorm over Guizhou in recent 48 years were analyzed by using the 12-hour precipitation data of 75 stations in Guizhou Province during 1961-2008.The result indicated that the area of more(less)rainstorm is identical to the area of more(less)annual precipitation and annual rainstorm fall;the annual precipitation of rainstorm was 12% ~32% of the total annual precipitation;the number of the annual average rainstorm days were1.6~4.9 days.The annual and summer average rainstorm days were increased,but decreased during spring and autumn.The monthly and ten-day distribution of rainstorm assumed"single-peak type"evidently.June is the most focus time section of the seasonal,monthly and ten-day rainstorm distribution.The frequency of rainstorm at night is obviously higher than that in daytime.更多还原