本文關(guān)鍵詞：波浪與海流對(duì)沉積物再懸浮貢獻(xiàn)的原位觀測(cè)研究　出處：《中國海洋大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 波浪 海流 泵送 再懸浮 原位觀測(cè)實(shí)驗(yàn)

【摘要】：波浪與海流是海底沉積物再懸浮的兩個(gè)主要?jiǎng)恿σ蛩兀壳搬槍?duì)兩者對(duì)再懸浮貢獻(xiàn)大小的研究較少。本文在自然科學(xué)基金資助項(xiàng)目“黃河口侵蝕再懸浮物海床內(nèi)部輸供及控制因素研究（”資助號(hào)：41072215；時(shí)間：2013-2015）和中國地質(zhì)調(diào)查局海洋地質(zhì)調(diào)查工作項(xiàng)目“海陸相互作用和海岸帶地質(zhì)災(zāi)害研究”（資助號(hào)：GZH201100203；時(shí)間：2012-2015）的資助下，通過現(xiàn)場(chǎng)原位觀測(cè)的方法，對(duì)膠州灣、營口白沙灣和黃河三角洲三個(gè)典型區(qū)域的波浪與海流對(duì)沉積物再懸浮貢獻(xiàn)進(jìn)行研究。其中膠州灣和白沙灣采用布放座底式三腳架原位觀測(cè)系統(tǒng)的方法進(jìn)行研究；黃河三角洲采用屏蔽波浪或海流，對(duì)比只有一種因素存在時(shí)與兩因素同時(shí)存在時(shí)懸浮物濃度的方法進(jìn)行研究；并且本文通過鋪設(shè)塑料薄膜，收集膜下表層細(xì)粒土樣的方法，研究了波浪“泵送”作用對(duì)黃河三角洲沉積物再懸浮的影響。 本文得出的主要研究結(jié)論如下： 1.海流是膠州灣海底沉積物發(fā)生侵蝕再懸浮的主要?jiǎng)恿σ蛩兀�，�?級(jí)海況下，海底沉積物再懸浮幾乎全部由海流所引起，此時(shí)海流對(duì)沉積物再懸浮貢獻(xiàn)率接近100%；在2級(jí)海況下，波浪作用對(duì)海底沉積物再懸浮貢獻(xiàn)率為21.9%-58.3%，海流對(duì)海底沉積物再懸浮貢獻(xiàn)為41.7%-78.9%。 2.海流對(duì)營口白沙灣海域海底沉積物再懸浮影響較小，較大的波浪作用是該海域沉積物發(fā)生侵蝕再懸浮的主要?jiǎng)恿σ蛩�。�?dāng)波浪有效波高小于50cm時(shí)，海流作用對(duì)沉積物貢獻(xiàn)為50%-100%，此時(shí)波浪作用對(duì)再懸浮貢獻(xiàn)小于50%；當(dāng)波浪有效波高大于50cm時(shí)，海流作用對(duì)沉積物再懸浮貢獻(xiàn)則小于50%，波浪作用對(duì)再懸浮貢獻(xiàn)大于50%。 3.黃河三角洲地區(qū)的再懸浮事件中，波浪作用對(duì)再懸浮貢獻(xiàn)為14%-73%，海流作用對(duì)再懸浮貢獻(xiàn)為27%-86%；在波致沉積物再懸浮過程中，波浪“泵送”作用對(duì)沉積物再懸浮貢獻(xiàn)為11.5%-42.8%，波浪剪切作用對(duì)沉積物再懸浮貢獻(xiàn)為57.2%-88.5%。 4.沉積物再懸浮后，需要較長時(shí)間才能完成沉降。因此，在現(xiàn)場(chǎng)通過屏蔽波浪的方式，進(jìn)行海流對(duì)沉積物再懸浮貢獻(xiàn)的研究方法不可行。
[Abstract]:Waves and currents are two main dynamic factors for resuspension of seabed sediments. At present, there is little research on the contribution of the two to the resuspension. This paper studies on the internal transport and control factors of erosion and resuspended sediment in the seabed of the Yellow River Estuary, a project funded by the Natural Science Foundation (. "Grant No.: 41072215; Time: 2013-2015) and Marine Geological Survey Project of China Geological Survey, "Marine and Land interaction and Coastal Geological hazards" (Grant No.: GZH201100203); With the aid of time: 2012-2015), through the method of in situ observation, Jiaozhou Bay was studied. The contribution of waves and currents to sediment resuspension in three typical areas of Yingkou Baisha Bay and Yellow River Delta is studied. The Yellow River Delta uses shielding waves or currents to compare the concentration of suspended matter when only one factor exists and two factors exist at the same time. The effect of wave "pumping" on sediment resuspension in the Yellow River Delta was studied by the method of collecting fine soil samples from the surface layer of the Yellow River Delta by laying plastic film. The main conclusions of this paper are as follows: 1. Ocean current is the main dynamic factor of erosion and resuspension of bottom sediment in Jiaozhou Bay. Under the condition of Grade 1, the resuspension of seabed sediment is almost entirely caused by the current. The contribution rate of ocean current to sediment resuspension is close to 100. Under the condition of order 2, the contribution rate of wave action to the resuspension of seabed sediment is 21.9- 58.3, and the contribution of current to the resuspension of seabed sediment is 41.7-78.9. 2. The current has little effect on the resuspension of sediment in Baisha Bay, Yingkou, and the larger wave action is the main dynamic factor of sediment erosion and re-suspension. When the wave effective wave height is less than 50 cm. The contribution of current to sediment is 50 to 100, and the contribution of wave action to resuspension is less than 50. When the wave effective wave height is more than 50cm, the contribution of current to sediment resuspension is less than 50cm, and the contribution of wave action to resuspension is greater than 50cm. 3. In the resuspension events in the Yellow River Delta, the contribution of wave action to the re-suspension is 14-73and the current action to the resuspension is 27-86. In the process of wave-induced sediment resuspension, the contribution of wave "pumping" to sediment resuspension is 11.5- 42.8%. The contribution of wave shear to sediment resuspension is 57.2%-88.5%. 4.After the sediment is resuspended, it takes a long time to complete the settlement. Therefore, it is not feasible to study the contribution of the current to the sediment resuspension by shielding the waves in the field.
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P714.6;P731.2

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