| 引用本文: | 张振克,王苏民,沈吉,吴艳宏,夏威岚,张祖陆.黄河下游南四湖地区黄河河道变迁的湖泊沉积响应.湖泊科学,1999,11(3):231-236. DOI:10.18307/1999.0307 |
| ZHANG Zhen-ke,WANG Su-min,SHEN Ji,XIA Wei-lan,WU Yan-hong,ZHANG Zu-lu.River Channel Changes Recorded by Lake Sediments in Nansiliu Lake, the Lower Reaches of the Yellow River. J. Lake Sci.1999,11(3):231-236. DOI:10.18307/1999.0307 |
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| 摘要: |
| 黄河下游地区湖泊演化多与黄河河道变迁密切相关,进行高分辨率的湖泊沉积环境的研究,可揭示历史时期黄河下游的河道变迁本文以南四湖DS孔为例,探讨河道变迁的湖泊沉积物响应.2400aBP左右南四湖地区环境演变出现明显的变化,湖泊沉积物色素、TOC、TN和磁化率一频率磁化率曲线显示2400aBP以来湖泊开始出现,黄河泛滥开始影响该区域.BC400-AD170和AD1200-AD1870期间是黄河影响DS孔湖泊沉积的主要时期.2400aBP以前南四湖地区的独山湖一带湖泊尚未形成,推测当时为泗河、城河冲积扇前缘的洼地.特别是13世纪以来人类活动与黄河泛滥加速了现代南四湖形成. |
| 关键词: 湖泊沉积 河道变迁 黄河下游地区 南四湖 |
| DOI：10.18307/1999.0307 |
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| 基金项目:中国科学院与山东自然科学基金,(Y95－60367〕 |
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| River Channel Changes Recorded by Lake Sediments in Nansiliu Lake, the Lower Reaches of the Yellow River |
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ZHANG Zhen-ke1,2, WANG Su-min1, SHEN Ji1, XIA Wei-lan1, WU Yan-hong1, ZHANG Zu-lu3
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1.Lake Sedimentation and Environment Lab., Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008;2.Departoment of Gengraphy and Oceanology. Nanjing University, Nanjing 210093;3.College of Resource and Environment, Sfiancloug Nortnul University, Jinan 250014
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| Abstract: |
| The historical changes of river channel (river floods) in the lower reaches of the Yellow River has been holly debated by the historians in China. In Nansihu Lake area, the sedimental environment has undergone great change, since the evolutionary history of the lake was strongly af fee led by floods of yellow River in historical times. High-resolution lacustrine sediments, reflecting the history of lake evolution, could be used Lo decipher the changes of river channel (river floods) in tne Lower Reaches of the Yellow River. Two sedimentary cores (DS1 and DS2) are taken by Livingstone in Dushan Lake, one of the sub-lakes of Nansihu Lake, 1996.The analysis of environmental indexes including pigments, TOC, TN and magnetic susceptibility, frequency dependent susceptibility, of lake sediments in the cores of DS is synthesized to indicate the environment changes in Nansihu Lake in the past 3000 years. About 2400aBP a clear environmental change occurred in the catchment of Nansihu Lake. From BC400s to ADI 70's and AD1200s-1870s are two main floods periods on the lower reaches of the Yellow River. Before 2400aBP the lake was not formed in the area which may be a depression in the edge of fluvial fan of the Sihe River and the Chenghe River. After 2400aBP the lake came into being and was enlarged due to the alluvial fan emerging from the overflow of the Yellow River, especially in BC400-AD170 and AD1200-1870.The link-up of the Grand Canal and the requisition for canal transportation from Lo AD1870 accelerated the lake expansion. From 1872, Nanyang Lake, Dushan Lake and Weishan Lake were united into one large lake-Nansihu Lake. |
| Key words: Lake sedimenLs river channel changes the lower reaches of the Yellow River Nansihu Lake |
