摘要
利用１９６５～１９８９年三峡区间３４个雨量站逐日降水量资料，计算了区间逐年的面暴雨和洪水，初步揭示了区间暴雨洪水的基本特征。指出三峡区间是长江流域多暴雨区之一，平均情况下７月和９月暴雨出现机会较其他月份多。三峡区间年最大洪峰出现在５～９月；约有１／３的区间洪水可与万县洪水遭遇；区间洪水可使宜昌流量增加。还计算了２４ｈ、３ｄ区间面暴雨及洪水的频率，为三峡工程二期围堰安全度汛和施工安排。
By use of daily precipitation data at 34 rainfall stations in Three Gorges intervening area in 1965 through 1989, the corresponding every-year areal mean storms, and floods are calculated, and the results reveal basic characteristics of the storm flood. Three Gorges intervening area is one of storm prone areas in the Yangtze valley, with storm often occurring in July and September on an average. Annual maximum intervening flood peak occurs in May through September. Some one third of intervening flood events could meet with above-Wanxian flood events. The intervening flood could increase the discharge at Yichang station by several thousands or more than ten thousands cubic metres per second. For providing information of storm flood in Three Gorges intervening area for the safety of TGP second stage cofferdams and TGP construction scheduling, 24-hour and 3-day areal intervening storms and intervening flood frequencies are also calculated.
出处
《人民长江》
北大核心
1999年第3期11-13,共3页
Yangtze River
关键词
暴雨洪水
自然地理
洪水频率
洪水特性
三峡
Storm flood \ Physical geography\ Flood frequency \ Flood characteristic\ Sanxia
