黄河中游河-三区间近200年区域性暴雨研究——等级指标系列的建立和演变规律

根据河口镇至三门峡区间区域性暴雨时、空集中性和重复性,以及与三门峡(陕县)洪峰量级和洪水次数的密切对应关系,运用实测雨量资料,以及陕县万锦滩水尺志桩资料及该区间雨、水、灾情史料记载,建立了1770年～1989年河-三区间区域性暴雨等级指标系列。由分析可知,区域性暴雨与其它气象要素一样,有其自身演变规律,并存在107.5a,53.7a和13.4a等6个显著周期。

Construction and Variation of the Regional Rainstorm Grade Series for the Hekouzen-Shanmenxia Basin of the Yellow River in the past 200 years

According to the temporal and spatial distributive concentration and the recurrence of the regional rainstorms over the Hekouzen-Shanmenxia basin,and their closing relationships with the magnitude order of flood peaks and the number of occurrences of flood at Sanmenxia (Shanxian),the regional grade index series from 1770-1989 is constructed by using the gage pile date at Wanjintan in Shanxian county,the historical information regarding stormflood disasters,and the recorded pr ecipitation data for the Hekouzen and Shanmenxia basin.From the analysis of the grade series it follows that the regional rainstorms,just like other meteorological elements,have their own variation pattterns,and that six prominent cycles of the regional rainstroms are detected for the past 200 years period.