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引用本文:叶金印,黄勇,张春莉,李致家.近50a淮河流域汛期降水日数和强度的分布与变化特征.湖泊科学,2013,25(4):583-592. DOI:10.18307/2013.0417
YE Jinyin,HUANG Yong,ZHANG Chunli,LI Zhijia.Characteristics of precipitation days and intensity over the Huaihe River basin in flood season during recent 50 years. J. Lake Sci.2013,25(4):583-592. DOI:10.18307/2013.0417
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近50a淮河流域汛期降水日数和强度的分布与变化特征
叶金印1,2, 黄勇3, 张春莉2, 李致家1
1.河海大学水文水资源学院, 南京 210098;2.淮河流域气象中心, 蚌埠 233040;3.安徽省气象科学研究所, 合肥 230031
摘要:
选用1961-2010年淮河流域145个地面气象站的观测资料,分析淮河流域汛期(5-9月)降水的时空变化规律.结果表明:淮河流域汛期降水的空间分布不仅受到地理位置和地形的影响,而且与湿度和风速的空间分布具有较好的相关性;在时间变化上,雨日出现频率有下降的趋势,但暴雨日比重和暴雨日平均降水量均有升高的趋势.淮河流域汛期暴雨日出现频率以及各类型雨日的平均降水量均有上升的趋势,强降水时空变化呈现局地性和频发性.
关键词:  降水  气候特征  淮河流域  汛期
DOI:10.18307/2013.0417
分类号:
基金项目:国家自然科学基金项目(40875012,40905019);公益性行业(气象)科研专项项目(GYHY200906007,GYHY201006037);中国气象局气象关键集成应用项目(CMAGJ2011M25);淮河流域气象开放研究基金项目(HRM201002,HRM201103)联合资助
Characteristics of precipitation days and intensity over the Huaihe River basin in flood season during recent 50 years
YE Jinyin1,2, HUANG Yong3, ZHANG Chunli2, LI Zhijia1
1.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P.R.China;2.Huaihe River Basin Meteorological Center, Bengbu 233040, P.R.China;3.Anhui Institute of Meteorology Science, Hefei 230031, P.R.China
Abstract:
The Huaihe River basin is located in the transitional zone from north subtropical to south warm temperate climate.The characteristics and influential factors of precipitation in different fields are various.This study investigated the distribution and determined the influential factors of precipitation in flood season over the Huaihe River basin.For this goal,the meteorological observation data of 145 stations from 1961 to 2010 were collected and analyzed.The percent of different intensity rainfall days and the ratio between storm days and rainfall days were calculated.Finally,the temporal variations of meteorological observation data were analyzed.The results showed that rainfalls in the southern of Huaihe River basin are higher than those in the northern,affected by several factors,such as terrain,moisture and wind.Meanwhile,rainfall exhibited temporal characteristics,with the percent of storm cases and ratio of storms to rainfall increasing from 1961.This study derived two main conclusions: first,the precipitation of the Huaihe River basin became heterogeneous in spatial and temporal distribution with the changing of climate;second,the heavy rain cases such as storm occurred more frequently than before.
Key words:  Precipitation  climatic characteristic  Huaihe River basin  flood season
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