泾河中游全新世古洪水沉积学与水文学研究(英文)

编号 zgly0001585783

文献类型 期刊论文

文献题名 泾河中游全新世古洪水沉积学与水文学研究(英文)

作者 查小春  黄春长  庞奖励  李瑜琴 

作者单位 CollegeofTourismandEnvironmentalSciences  ShaanxiNormalUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2012年03期

年份 2012 

分类号 P532  P333 

关键词 JingheRiver  palaeoflood  Holocene  China 

文摘内容 Palaeo-hydrological field investigation was carried out in the middle reaches of the Jinghe River. A set of palaeoflood slackwater deposit beds was identified in the Holocene loess-soil sequence in the riverbanks. The sediment samples were collected from the profile, and the particle-size distribution, magnetic susceptibility, loss-on-ignition were analyzed in laboratory. The analytical results showed that the palaeoflood slackwater deposits have re-corded extraordinary flood events in the Jinghe River valley. According to stratigraphic cor-relation and OSL dating, the palaeoflood events were dated to 4100-4000 a BP. The pa-laeoflood peak discharges were estimated to be 19,410-22,280 m3/s by using the hydro-logical model and checked by different approaches. These results have the flood data se-quence of the Jinghe River extended to 10,000-year time-scale. It provided significant data for hydraulic engineering and for mitigation of flood hazards in the Jinghe River drainage basin.