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| 黄河废弃三角洲海底冲淤演变规律研究 | |
| 引用本文： | 刘勇,李广雪,邓声贵,赵东波,温国义.黄河废弃三角洲海底冲淤演变规律研究[J].海洋地质与第四纪地质,2002,22(3):27-34. |
| 作者姓名： | 刘勇 李广雪 邓声贵 赵东波 温国义 |
| 作者单位： | 1. 吉林大学,地球科学学院,长春,130026;青岛海洋大学,海洋地球科学学院,青岛,266003;中国科学院,地球环境研究所黄土与第四纪地质国家重点实验室,西安,710075 2. 青岛海洋大学,海洋地球科学学院,青岛,266003;中国科学院,地球环境研究所黄土与第四纪地质国家重点实验室,西安,710075 3. 青岛海洋大学,海洋地球科学学院,青岛,266003 |
| 基金项目： | 黄土与第四纪地质国家重点实验室资助项目 |
| 摘 要： | 1976年黄河改道清水沟流路后，钓口流路三角洲叶瓣废弃，由于大量陆源沉积物供应的断绝，原来形成的快速堆积地形变得极不稳定，水下三角洲岸坡受到海洋动力快速冲蚀作用。根据长期水深资料的对比研究，波浪侵蚀使水下岸坡整体变缓以适应新的沉积动力环境，正逐渐形成新的冲淤平衡剖面。对整个研究区的水深资料进行叠加，总结其海底冲淤演变规律。采用20660、20656、20652和20648剖面上的散点（整数水深点）水深变化，结果表明废弃三角洲海底由浅水区向深水区冲淤组合呈带状分布，且越向深水区周期性越明显。 |
| 关 键 词： | 废弃三角洲 海底冲淤规律 黄河 沉积动力环境 冲蚀作用 水深资料 |
| 文章编号： | 0256-1492(2002)03-0027-08 |
| 修稿时间： | 2002年2月6日 |
EVOLUTION OF EROSION AND ACCUMULATION IN THE ABANDONED SUBAQUEOUS DELTA LOBE OF THE YELLOW RIVER |
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| LIU Yong ,,LI Guang xue ,DENG Sheng gui ,ZHAO Dong bo ,WEN Guo yi.EVOLUTION OF EROSION AND ACCUMULATION IN THE ABANDONED SUBAQUEOUS DELTA LOBE OF THE YELLOW RIVER[J].Marine Geology & Quaternary Geology,2002,22(3):27-34. | |
| Authors: | LIU Yong LI Guang xue DENG Sheng gui ZHAO Dong bo WEN Guo yi |
| Institution: | LIU Yong 1,2,3,LI Guang xue 2,3,DENG Sheng gui 2,ZHAO Dong bo 2,WEN Guo yi 2 |
| Abstract: | After 1976, the Yellow River shifted into the Qingshuigou Bay, and the delta formed by the Diaokou distributary was abandoned. Because the large terrigenous sediment was cut off, the delta lobe became extraordinarily unstable, and the subaqueous delta front slope was quickly scoured by the marine dynamic system. From years of depth data the analysis, result shows that the whole subaqueous delta becomes smooth to fit the new deposition dynamic environment and forms a new counterbalanced profile. If we superpose plane depth data of the whole study area, we may get the rule of evolution of the erosion and accumulation. Depth changes of discrete points on profiles 20660, 20656, 20652, and 20648 show that combination of erosion and accumulation presents banding distribution trend from shallow to deep area in the undersea abandoned delta. The deeper the area, the more obvious the periodicity.In other words,since the delta lobe was abandoned in 1976,the transform from scouring to filling was generally conducted during 1976-1984;1984-1992 saw another cycly of scouring filling evolution.From 1992 to 1998,the subaqueous slope went into balance,and as the result of that,transform period shortened and scouring filling amplitude became smaller.And 1998-1999 showed the beginning of another cycle.After 1999,the area experienced scouring for three or fours years first and then entered the stage of silting up. |
| Keywords: | the abandoned delta scouring and silting law the Yellow River |
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