【摘要】 根据湄公河流域6个代表性水文站1960—2005年的实测资料,利用滑动平均法和Mann-Kendall非参数检验法对径流量变化趋势进行了分析.结果表明:湄公河流域径流量年际变化较平缓,趋势不显著;年代变化中,上游3个站点的变化趋势较小,而下游3个站点呈现先减小后显著上升的趋势;径流量年内分配极不均匀,下游地区来水比上游地区更加向汛期集中,月径流量有显著变化趋势的主要发生在非汛期月份,大部分站点汛期呈下降趋势,非汛期呈上升趋势.更多还原

【Abstract】 Based on the measured data at 6 representative hydrological stations in Mekong River basin during 1960-2005,the moving average method and the Mann-Kendall non-parametric test method were employed to analyze the trend of its runoffs.The results show that the inter-annual variation of the runoffs is gentle and the trend is not significant.The inter-decadal variation of the runoffs at the upstream 3 stations is small,but that at the downstream 3 stations rapidly increases after a slight decline.The intra-annual variation of the runoffs is great,and the inflow from the downstream is more concentrated than that from the upstream during flood season.Most significant variation of monthly runoffs occurs during non-flood season.The runoffs at most stations decrease during flood season and increase during non-flood season.更多还原