1959—2008年广西西江流域洪涝气候特征  

Flood Characteristics of the Xijiang River Basin in 1959-2008

作　　者：何慧[1] 陆虹[1] 欧艺[1] 

机构地区：[1]广西壮族自治区气候中心,南宁530022

出　　处：《气候变化研究进展》2009年第3期134-138,共5页Climate Change Research

基　　金：广西自然科学基金(桂科自0728074)资助

摘　　要：利用1959—2008年西江流域气象测站降水资料、西江干流及其支流年最高水位资料,建立逐年洪涝发生站次序列,并分析其时空特征和演变规律。结果表明:西江干流发生洪涝的频率比各支流大,各支流的中下游发生洪涝频率比上游大;西江流域洪涝的发生站次具有较显著的阶段性和突变性特征,主要突变发生在1967年和1993年;近16a洪涝发生频率显著偏多,流域性大洪涝基本集中在这一时期。了解西江流域洪涝变化的规律,有利于提高洪涝灾害评估和预测水平,为防灾减灾提供科学依据。By using the precipitation data of meteorological stations in the Xijiang River basin, and time series of the flood peak water levels of the mainstream and tributaries of the Xijiang River in 1959-2008, the data sets of yearly flood occurrence times were developed, and the spatial and temporal characteristics of the flood occurrence times and their evolution laws were analyzed. The results indicate that the flood frequency in the mainstream region of the Xijiang River was higher than those in the tributary regions, and the flood frequency in the lower reaches of the tributaries was higher than that in the upper reaches. The flood occurrence times had a prominent stage characteristic and some significant abrupt changes, the main abrupt changes happened in 1967 and 1993. Moreover, the floods occurred more frequently in recent 15 years; the basin-wide disastrous floods mainly concentrated in this period. Studying the flood laws in the Xijiang River basin is beneficial for raising the level of flood disaster evaluation and prediction, and for providing a scientific basis for hazard mitigation and prevention.

关 键 词：洪涝 时空特征 演变规律 阶段性 突变 

分 类 号：P426.616[天文地球—大气科学及气象学]