北京师范大学学报（自然科学版）2018，Vol.54Issue(2)：224-231,8.DOI:10.16360/j.cnki.jbnuns.2018.02.013
场次降水与日降水差异对比
Comparison of event and daily precipitations
摘要
Abstract
One-minute rainfall data from 18 weather stations in middle and eastern China from 1961-2000 were used to derive event and daily precipitation values. Statistical relationships of event and daily precipitations were compared at different rainfall levels. Half-day rainfall of either 08:00-20: 00 or 20:00-8:00 from 811 weather stations nationwide were used to derive two datasets of daily rainfall according to different criteria of weather station (08:00-08:00) and hydrological station (20:00-20:00). Effects of daily boundary on characteristics of daily rainfall were analyzed. It was found that most events occured on the same day or across one day. The mean, 90％ percentile, 95％ percentile and maximum values of rainfall calculated from event precipitation data were found to be 1.2,1.2, 1.3 and 1.5 times of values calculated from daily precipitation. The 10 a,20 a, 50 a and 100 a return level precipitations calculated from daily rainfall data were found to be comparable to those calculated from event data after multiplying coefficients of 1.39,1.42,1.44 and 1.45,respectively. Daily precipitation boundary weather station criterion and hydrological station criterion had no significant impact on rainy days with rainfalls of ＜250.0 mm, whereas rainy days with rainfalls ≥250.0 mm based on the weather station criterion were significantly larger than those based on hydrological station criterion. Daily rainfall values in return levels based on weather station criterion were larger than those based on hydrological station criterion for Yangtze River Basin, Pearl River Basin and most of Northwest China,whereas the relationship is reverse for the southeast coast, northern part of North China and Northeast China.关键词
场次降水/日降水/重现期/气象站/水文站Key words
event precipitation/daily precipitation/return period/weather station/hydrological station分类
建筑与水利引用本文复制引用
王文婷,殷水清,袁莹莹..场次降水与日降水差异对比[J].北京师范大学学报（自然科学版）,2018,54(2):224-231,8.基金项目
国家自然科学基金资助项目(41301281) （41301281）
城市短历时强降水监测和致灾阈值研究及业务系统研发资助项目(GYHY201506014) （GYHY201506014）
