| 引用本文: | 石彬楠,黄春长,庞奖励,查小春,周亚利,张玉柱,刘雯瑾.黄河龙门段商周转折时期的古洪水事件及气候背景.湖泊科学,2017,29(1):234-245. DOI:10.18307/2017.0125 |
| SHI Binnan,HUANG Chunchang,PANG Jiangli,ZHA Xiaochun,ZHOU Yali,ZHANG Yuzhu,LIU Wenjin.Palaeoflood events and climate change at the turning time from the Shang to Zhou Dynasty in the Longmen reach of the Yellow River. J. Lake Sci.2017,29(1):234-245. DOI:10.18307/2017.0125 |
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| 摘要: |
| 通过野外观察研究，在黄河中游晋陕峡谷龙门段乡宁-韩城大桥西端支沟内，发现了全新世古洪水滞流沉积物.通过野外观察和室内实验分析，证明它们是黄河特大洪水悬移质泥沙在高水位滞流环境下的沉积物，记录了黄河晋陕峡谷段一期4次特大古洪水事件.通过地层学对比分析和光释光测年，确定这4次洪水发生在全新世中期-晚期转折阶段，即我国历史上商代末期-西周初期的气候突变转型期.利用“古洪水滞流沉积物厚度含沙量法”恢复古洪水洪峰水位，运用HEC-RAS模型估算出4次古洪水事件洪峰流量介于46280~48800 m3/s之间.这些成果为黄河中游地区的防洪减灾、水资源开发利用、流域生态环境综合治理等方面提供了可靠的超长尺度水文数据.这为深入理解黄河流域水文系统对于全球变化的响应规律提供了新的证据. |
| 关键词: 古洪水 商末 滞流沉积物 水文学 黄河 |
| DOI：10.18307/2017.0125 |
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| 基金项目:国家自然科学基金项目（41471071）资助. |
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| Palaeoflood events and climate change at the turning time from the Shang to Zhou Dynasty in the Longmen reach of the Yellow River |
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SHI Binnan, HUANG Chunchang, PANG Jiangli, ZHA Xiaochun, ZHOU Yali, ZHANG Yuzhu, LIU Wenjin
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College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062, P. R. China
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| Abstract: |
| Palaeoflood slackwater deposits (SWD) of the Holocene and paleoflood indicators were interbeddedly found within the cliff riverbanks at Xianghanqiao profile in the Longmen reach of the Yellow River. Paleoflood SWD was identified by a variety of sedimentological criteria during field investigations and laboratory analysis. A set of four SWD records four paleoflood events individually. These slackwater deposits recorded the extraodinary floods happened between 3200-2800 a B.P. on the Yellow River, by using Optically Stimulated Luminescence dating method in combination with pedostratigraphy correlations. This indicated that the extraordinary floods happened during the dynasties from the Shang to the Western Zhou in Chinese history. The flooding peak stages were estimated with the sediment concentration and the depositional depths of the SWD. The estimated results indicated that the paleoflood peak discharges were between 46280 and 48800 m3/s by using HEC-RAS model. The results provided an important basis for this regional flood control and disaster mitigation project, water resource management, and comprehensive treatment of the ecological environment. |
| Key words: Paleoflood Shang dynasty slackwater deposits hydrology Yellow River |
