| 2013 年黑龙江省夏季洪涝灾害成因分析 |
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| 引用本文： | 李永生,张健,于梅,班晋.2013 年黑龙江省夏季洪涝灾害成因分析[J].气象与环境学报,2014,30(3):31-37. |
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| 作者姓名： | 李永生 张健 于梅 班晋 |
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| 作者单位： | 黑龙江省气候中心，黑龙江 哈尔滨 150030 |
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| 基金项目： | 资助项目：黑龙江省气象局2014年科技研究项目（HQ2014018）资助. |
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| 摘 要： | 利用1961-2013年逐日降水资料及NCEP/NCAR再分析资料，分析2013年黑龙江省境内三江流域及支流发生大洪水的原因，并对盛夏降水异常成因进行了分析。结果表明：2013年黑龙江省境内三江流域及其支流发生大洪水的原因为前期降水偏多，使土壤湿度大，流域内蓄水较大；同时，夏季降水偏多，降水时段集中，暴雨频次多于常年；多座大中型承担防洪任务的水库超汛限水位运行，为了保护水库堤坝的安全，泄洪量加大。黑龙江省盛夏降水偏多的主要原因为东北冷涡活动频繁且路径偏北；850 hPa水汽输送充足；200 hPa东亚高空西风急流位置异常，东亚夏季风偏强；500 hPa，欧亚纬向环流弱，西太平洋副热带高压阶段性异常偏北，鄂霍次克海地区阻塞高压明显，黑龙江地区上空盛夏为负距平控制。
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| 关 键 词： | 降水 三江流域 洪涝灾害 |
Forming reasons of flood disaster in summer of 2013 in Heilongjiang province |
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| LI Yong-sheng,ZHANG Jian,YU Mei,BAN Jin.Forming reasons of flood disaster in summer of 2013 in Heilongjiang province[J].Journal of Meteorology and Environment,2014,30(3):31-37. |
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| Authors: | LI Yong-sheng ZHANG Jian YU Mei BAN Jin |
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| Institution: | Climate Center of Heilongjiang Province, Harbin150030, China |
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| Abstract: | Based on the daily precipitation and NCEP/NCAR reanalysis data from 1961 to 2013,the forming reasons of flood and summer precipitation anomaly were analyzed in the three rivers valley and their tributaries of Heilongjiang province in 20 1 3 .The results show that the overmuch former precipitation is the main reason of flood and leads to high soil humidity and overfull water storage in the valley in 2013.At the same time,the rainstorm frequency is higher in 2013 than in the other years because of abundant and concentrative summer rainfall.The wa-ter storage capacity in many large and medium sizes reservoirs undertaking the flood control task exceeds the normal standard,so flood discharge increases in order to protect the safety of reservoir dam.The main reasons causing the more summer precipitation in Heilongjiang province are that the northeast cold vortex is active and its path is north-moving;water vapor transport is sufficient at 850 hPa;the location of the East Asian westerly jet is abnormal at 200 hPa and the East Asian summer monsoon is strong.At 500 hPa,the Eurasian zonal circulation is weak;the west Pacific subtropical high is abnormally north-moving in some stages;the Okhotsk blocking high is obvious;it is controlled by the height field in midsummer over the Heilongjiang region. |
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| Keywords: | Precipitation Three rivers valley Flood disaster |
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