| 马莲河全新世古洪水沉积学和水文学研究 |
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| 引用本文： | 周芳,查小春,黄春长,王夏青,桑京京.马莲河全新世古洪水沉积学和水文学研究[J].地理科学进展,2011,30(9):1081-1087. |
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| 作者姓名： | 周芳 查小春 黄春长 王夏青 桑京京 |
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| 作者单位： | 陕西师范大学旅游与环境学院,西安,710062 |
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| 基金项目： | 国家自然基金重点项目(41030637,40771018); 中央高校基本科研业务费专项资金项目(GK200901007) |
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| 摘 要： | 通过对马莲河中下游的深入考察，在甘肃省合水县河段发现全新世古洪水滞流沉积剖面，对采集的沉积物样品进行粒度成分、石英砂表面结构等分析，证明为典型的古洪水滞流沉积物。通过地层学年代对比分析，确定马莲河在全新世中晚期发生特大洪水，年代大致为4200-4000a B．R之间。根据该组古洪水滞流沉积物所指示的洪峰水位，采用比降法恢复洪峰流量在16400～16900m^3／s之间。同时对该断面2003年和2005年洪水的洪痕进行了流量恢复计算，计算结果与实测洪水误差小于5％，证明古洪水水文学计算结果合理可靠，从而为马莲河水利工程建设及沿岸城镇的防洪减灾提供了科学依据。
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| 关 键 词： | 马莲河 古洪水 滞流沉积物 洪痕 全新世 |
Study on Holocene Paleoflood in Malian River Basin |
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| ZHOU Fang,ZHA Xiaochun,HUANG Chunchang,WANG Xiaqing,SANG Jingjing.Study on Holocene Paleoflood in Malian River Basin[J].Progress in Geography,2011,30(9):1081-1087. |
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| Authors: | ZHOU Fang ZHA Xiaochun HUANG Chunchang WANG Xiaqing SANG Jingjing |
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| Institution: | (College of Tourism and Environmental Sciences,Shaanxi Normal University,Xi’an 710062,China) |
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| Abstract: | Through investigations in the middle and lower reaches of Malian River,Holocene palaeoflood slack-water deposition profile were identified in Heshui County.Samples of the palaeoflood slackwater deposits were collected,and the grain-size distribution and the quartz grain surface texture were examined.All of these index-es showed that the slackwater deposits were typical in the study area.Stratigraphic correlations showed that the slackwater deposits recorded the largest floods occurred between 4200-4000 a B.... |
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| Keywords: | Malian River palaeoflood slackwater deposits flood stage indicator Holocene |
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