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秭归县1998-2019年暴雨变化特征分析
杨艳丽,谢陈,刘持菊
0
(秭归县气象局;秭归县气象局 湖北秭归 443600)
摘要:
利用秭归县1998-2019年气象观测资料,分析暴雨在不同时期的变化特征。结果表明:秭归县暴雨从4月开始出现,10月结束,75.4%的暴雨主要集中出现在主汛期(6-8月),其中梅雨期的暴雨量占35.0%,暴雨强度为70.1mm/d;盛夏期的暴雨量占36.0%,暴雨强度为69.7mm/d。梅雨期的暴雨量比盛夏时期略少,但梅雨期的暴雨强度偏强。暴雨的日数、暴雨量、暴雨强度、暴雨贡献率整体呈减少的变化趋势。受地形的影响,秭归县暴雨分布特点为:东南部多于西北部,江南多于江北,半山坡多于谷地,主要落区集中在东南部和西南部地区,夜间出现暴雨的次数明显多于白天。
关键词:  秭归县  暴雨  变化特征  分析
DOI:
投稿时间:2020-07-04修订日期:2020-08-14
基金项目:
Analysis on the characteristics of rainstormin Zigui County
()
Abstract:
Based on the meteorological observation data of Zigui County from 1998 to 2019, the variation characteristics of heavy rain in different periods have been analyzed. The results have shown that 75.4% of the heavy rain in Zigui County began in April and ended in October, mainly occurred in the main flood season (June-August) , of which 35.0% in the meiyu season and 70.1 mm / d in the rainstorm intensity, and 36.0% in the mid-summer season, the intensity of rainstorm is 69.7 mm / d. The heavy rainfall in Meiyu period is slightly less than that in mid-summer period, but the intensity of heavy rainfall in Meiyu period is stronger. The number of days, amount, intensity and contribution rate of rainstorm show a declined trend as a whole.
Key words:  Zigui County  Rainstorm  Change Characteristics  Analysis

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