內(nèi)孤立波作用下南海北部陸坡沙波形成過(guò)程實(shí)驗(yàn)?zāi)M
[Abstract]:In order to explore the formation mechanism of sand wave on continental slope under the action of internal solitary wave, the continuous action process of concave internal solitary wave on sandy silt, clay silt and fine sand slope was simulated in a laboratory flume. The changes of soil slope elevation before and after internal solitary wave action, the real-time change of soil and water interface and the temporal and spatial variation of suspended matter concentration were monitored by ultrasonic topographic automatic measurement and analysis system (TTMS), resistance probe and temperature and salt depth instrument (RBR 路CTD), respectively. Based on the test results, the characteristics of sediment suspension, migration and sedimentary process are analyzed. The results show that the suspension-transport modes of different types of sediments are different in the process of sand wave formation. Under the action of solitary waves in constant amplitude, sand silt is suspended and migrated to the top of the slope, in which the larger particles are deposited at the top of the slope. Smaller particles migrate to the bottom of the slope along the slope. After suspension, clay silt moves to the top and slope at the same time, and the foggy layer diffuses horizontally along the equal density layer at the top and middle of the slope, and the migration mode of sandy silt is mainly bed load movement, and the clay silt is mainly suspended movement. The sand wave slope formed by internal solitary wave has no sharp edge, is smooth, the two slopes are asymmetrical, the upcurrent surface is thin, and the backflow surface is thick.
【作者單位】: 中國(guó)海洋大學(xué)環(huán)境科學(xué)與工程學(xué)院;山東省海洋環(huán)境地質(zhì)工程重點(diǎn)實(shí)驗(yàn)室中國(guó)海洋大學(xué);
【基金】:國(guó)家自然科學(xué)基金重大科研儀器研制項(xiàng)目(41427803)資助~~
【分類(lèi)號(hào)】:P731.2;P737.2
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