RESEARCH OF MICROGEOMORPHOLOGY OF SUBMARINE SAND WAVES IN DAISHAN HOUSHAYANG OF ZHOUSHAN ISLANDS
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摘要:
利用多波束测深系统和浅地层剖面系统，对舟山群岛岱山后沙洋进行高精度探测，结果表明：①区内微地貌形态具有明显的分带性，依次出现岸坡区、沙脊区、缓坡区、沟槽区和深水平坦区；②海底沙波主要集中在缓坡区、沙脊区南侧及东侧边缘、沟槽区北侧及沟槽内2个小沟槽交界处的迎水流斜坡上；③海底沙波多发育于水深10.0~21.1 m之间，地形相对平缓，坡度0.09°~2.8°；④区内海底沙波可分为小型、中型和大型沙波；⑤区内海底沙波是潮流动力形成的现代强运动型沙波。
Abstract:Sand waves in the Daishan Houshayang of the Zhoushan Islands were surveyed with multibeam sounding system and subbottom profiler. Results show that, 1) bedforms are distributed in the zones of shore slope, sand ridge, gentle slope, trench and flat bed seawards from the coast; 2) sand waves are mainly developed in the gentle slope zone, the south and east to the sand ridge zone, the north of the trench and the slopes between small trenches; 3) sand waves are usually distributed in relatively flat terrain within a depth of 10m to 21.1m on a slope less than 0.09 degree to 2.8 degree; 4) sand waves can be divided into small, medium and large ones in a zone. 5) sand waves move actively under the action of tidal current.
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Key words:
- Daishan Houshayang /
- marine topography /
- microrelief character /
- submarine sand waves /
- Zhoushan Islands
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