摘要
暴雨是影响广西喀斯特生态脆弱区石漠化治理和植被保护修复最重要的气象灾害。利用1971—2020年地面气象观测站逐日降水量观测资料等,利用数理统计和GIS空间分析技术研究了近50年广西喀斯特地区暴雨灾害发生的时空变化特征。结果表明:(1)近50年广西喀斯特地区暴雨灾害主要集中在春、夏季。(2)≥50 mm暴雨累积日数和≥50 mm暴雨累积雨量都呈不明显增加变化趋势,春季减少其他季节为增加变化。逐10年变化中≥50 mm暴雨累积日数比暴雨累积量表现出更强的波动性。(3)近50年研究区中部(河池市西南部)、东北部(桂林市东北部)是暴雨多发地区,多数地区≥50 mm暴雨累积日数、≥50 mm暴雨累积雨量为增加变化,但两者空间差异较大,桂林市东北部暴雨增加趋势明显,但局部地区暴雨日数变化和暴雨日数变化趋势并不同步。
Rainstorm is the most important meteorological disaster that affects rocky desertification control and vegetation protection and restoration in Guangxi karst ecological fragile area.Based on the daily precipitation observation data of surface meteorological observation stations from 1971 to 2020,the temporal and spatial variation characteristics of rainstorm disasters in karst areas of Guangxi in recent 50 years were studied by using mathematical statistics and GIS spatial analysis technology.The results showed that:(1)In the past 50 years,rainstorm disasters in karst areas of Guangxi focused on spring and summer.(2)The cumulative days of≥50 mm rainstorm and the cumulative rainfall of≥50 mm rainstorm showed no obvious increase trend,and the decrease in spring and other seasons showed an increase trend.The cumulative days of≥50 mm rainstorm showed stronger volatility than the cumulative amount of rainstorm in the 10 year change.(3)In the past 50 years,the central part(southwest of Hechi City)and northeast part(northeast of Guilin City)of the study area were frequent areas of rainstorm.In most areas,the cumulative days of≥50 mm rainstorm and the cumulative rainfall of≥50 mm rainstorm were increasing,but the spatial difference between the two was large.The rainstorm increase trend in northeast of Guilin was obvious,but the change trend of rainstorm days and rainstorm days in some areas was not synchronous.
作者
陈耀飞
陈燕丽
谢映
肖鸿祥
韦德宝
黄冬梅
Chen Yao-fei(Huanjiang Meteo-rological Bureau,Huanjiang,Guangxi 547100)
出处
《农业灾害研究》
2023年第9期160-163,170,共5页
Journal of Agricultural Catastrophology
基金
广西科技厅重点研发项目(桂科AB20159022)。
关键词
喀斯特地区
暴雨灾害
时空分布
变化趋势
Karst area
Torrential rain disaster
Spatio-temporal distribution
Change trend
作者简介
陈耀飞(1994-),男,广西武鸣人,助理工程师,主要从事农业气象研究;通信作者:陈燕丽(1982-),女,广西柳州人,正高级工程师,主要从事遥感和气象应用研究,E-mail:cyl0505@sina.com。
