| 沉积过程分形表达及其冲淤幅度分析应用 |
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| 引用本文： | 李炎,陈锡土,夏小明,李伯根.沉积过程分形表达及其冲淤幅度分析应用[J].海洋与湖沼,2000,31(1):84-92. |
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| 作者姓名： | 李炎 陈锡土 夏小明 李伯根 |
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| 作者单位： | 国家海洋局第二海洋研究所,杭州,310012 |
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| 基金项目： | 浙江省自然科学基金!494007，香港裘搓基金1996－1997年度访问学者资助 |
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| 摘 要： | 根据１９８２－１９９５年在浙江沿岸椒江口、杭州湾、象山县大目涂取得的沉积柱样层序数据系列和重复沉积界面测量序列，利用分形理论进行沉积过程及冲淤幅度的分析。沉积过程和沉积地层层序存在自相似结构，两者之间在无特征尺度区存在着初始值以及分数维的传递。椒江河口和杭州湾南侧潮汐通道边坡沉积柱样泥层工的分数维在１．２－１．５之间。按潮汐沉积基本单元形成的时间为大小潮周期计算，沉积过程１年重现期的高程均方变幅为
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| 关 键 词： | 分形 沉积作用 河口海岸 沉积过程 冲淤幅度 |
| 收稿时间： | 1/5/1998 12:00:00 AM |
| 修稿时间： | 1999/2/10 0:00:00 |
FRACTAL REPRESENTATION AND ANALYSIS OF DEPOSITIONAL PROCESSES AND SEQUENCE |
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| LI Yan,CHEN Xi-tu,XIA Xiao-ming and LI Bo-gen.FRACTAL REPRESENTATION AND ANALYSIS OF DEPOSITIONAL PROCESSES AND SEQUENCE[J].Oceanologia Et Limnologia Sinica,2000,31(1):84-92. |
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| Authors: | LI Yan CHEN Xi-tu XIA Xiao-ming and LI Bo-gen |
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| Institution: | Second Institute of Oceanography, SOA, Hangzhou 310012;Second Institute of Oceanography, SOA, Hangzhou 310012;Second Institute of Oceanography, SOA, Hangzhou 310012;Second Institute of Oceanography, SOA, Hangzhou 310012 |
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| Abstract: | it is shown in the present contribution that the scale invariance appears both in bine series and depositional sequences linked with a similar fractal dimension. Sedimentary records from the estuary of the Jiaojiang River, inter-tidal area and tidal channels adjacent to the Hangzhou Bay were analyzed. Their fractal dimension range between 1.2 and 1.5 not only in sedimentary processes but also in depositional sequences. Taking into account the fractal dimension and initiator derived from muddy layer sequence and assumed that the initiator is dominated by spring and neap tidal cycle, the mean square fluctuation range of sedimentary series was calculated. In the study areas the range was 3-28 cm for one-year return periods, 10-167 cm for ten years return periods and 21-575 cm for fifty years return periods. The fractal properties might be useful to distinguish the ranges of erosion or deposition events with different cycles. |
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| Keywords: | Fractal Sedimentation Fluctuation Coast and estuary |
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