摘要
基于贺州市1957～2014年共58 a的降雨资料,采用年最大值法选取降雨样本,应用耿贝尔分布指数拟合调整得到P-i-t关系值,并利用数值逼近法和最小二乘法求解暴雨强度公式。结果表明：上述方法求得的暴雨强度公式合理可行,且具有较高的评价精度。对比本文公式、原暴雨强度公式,发现本文公式计算值偏大,且随着降水历时的增长,偏大幅度有所增加,符合近30 a来贺州市暴雨事件频繁的事实。
Based on the precipitation data of Hezhou Meteorological Bureau during from 1957 ～ 2014,and rainfall samples were selected by annual maximum value method,then,the relations among the return period,intensity and duration of storm were built by Gumbel distribution analysis. On this basis the number approaching method and least square both were applied to find the storm intensity formula. The results showed that the rainstorm intensity formula obtained by the above method is reasonable and feasible,and has high evaluation accuracy. Based on the comparison of this formula and the original rainstorm intensity formula,we found that the calculation value of this formula is larger,and with the duration of precipitation growth,partial substantial increase,in accordance with the fact in past 30 years.
出处
《河南城建学院学报》
CAS
2016年第5期83-87,共5页
Journal of Henan University of Urban Construction
基金
贺州市"多规合一"试点工作项目(HZZG2015服字34号)
关键词
暴雨强度公式
贺州市
年最大值法
耿贝尔分布
storm intensity formula
Hezhou
annual maximum method
Gumbel distribution
