THE TOPOGRAPHICAL AND MORPHOLOGICAL FEATURES OF MODERN YELLOW RIVER MOUTH AREA AND THEIR RELATION TO EROSIONAL/DEPOSITIONAL PROCESSES
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摘要: 中科院海洋所2007年对黄河口进行了大范围、高精度的水深测量,2009年又对清水沟南部进行了加密测量。利用这些数据分析了现代黄河口的地形地貌特征。发现废弃河口黄河水下三角洲前缘斜坡,在5 m水深左右分布大规模的冲沟,2009年最新资料显示其规模有增大的趋势。将收集到的2000年和2007年数据进行对比计算,并对近年来老河口和现行河口地形变化比较大的区域设计了4条剖面线,分析讨论了研究区内的冲蚀淤积分布特点和水下三角洲地形变化情况。Abstract: A wide and precise water-depth investigation was conducted in the discharge area of the modern Yellow River in 2007, and a more elaborate survey was done in the south area of Qingshuigou in 2009 by the Institute of Oceanology. Topographical and morphological features are studied from these precise data. Several large gullies lie across the front slope of the subaqueous delta at about 5m depth area. The 2009 data indicate that erosion is getting more and more serious. The erosion/deposition distribution features of the subaqueous delta are analyzed through comparison of the 2000, 2007 water-depth data with the four topographic profiles designed in modern and abandoned mouth area.
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