| 泾河中游全新世古洪水沉积学与水文学研究(英文) |
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| 引用本文： | 查小春,黄春长,庞奖励,李瑜琴.泾河中游全新世古洪水沉积学与水文学研究(英文)[J].地理学报(英文版),2012,22(3):470-478. |
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| 作者姓名： | 查小春 黄春长 庞奖励 李瑜琴 |
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| 作者单位： | College of Tourism and Environmental Sciences, Shaanxi Normal University |
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| 基金项目： | National Natural Science Foundation of China, No.41030637;Fundamental Research Funds for Central Universities, No.GK200901007 |
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| 摘 要： | 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.
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| 关 键 词： | Jinghe River palaeoflood Holocene China |
Sedimentary and hydrological studies of the Holocene palaeofloods in the middle reaches of the Jinghe River |
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| Xiaochun Zha,Chunchang Huang,Jiangli Pang,Yuqin Li.Sedimentary and hydrological studies of the Holocene palaeofloods in the middle reaches of the Jinghe River[J].Journal of Geographical Sciences,2012,22(3):470-478. |
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| Authors: | Xiaochun Zha Chunchang Huang Jiangli Pang Yuqin Li |
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| Institution: | College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi’an 710062, China |
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| Abstract: | 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. |
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| Keywords: | Jinghe River palaeoflood Holocene China |
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