以泾河中游彬县至礼泉段的JH-CJC沉积记录的古洪水信息,结合实测洪水和历史洪水资料,比较了泾河流域不同时间尺度洪水序列频率。研究结果表明,将古洪水研究成果加入到历史洪水和实测洪水资料序列中,可大大延长洪水序列的时间长度,提高洪水频率分析的精度,说明河流沉积记录的古洪水信息,对于水利工程建设和防洪减灾具有重要的意义。
Flood frequency analysis was the main methods to calculate the design flood in water conservancy construction.Based on palaeoflood recorded in JH-CJC sedimentological profile between Bin County and Liquan County in Jinghe River channel, the flood frequenciies of the gauge flood, gauge flood+ historical flood and gauge flood+ historical flood+ palaeoflood were analyzed in this paper.The results showed that the palaeofloods data were connected with the historical flood and gauge flood data, the flood data sequence were prolonged and the credibility of flood frequency result was greatly advanced.So, studying the palaeoflood recorded in sedimentological evidence was very important to the conservancy construction, mitigate flood hazard and develop water resources.
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