湄洲灣北部海底地貌特征研究與分析
[Abstract]:In order to systematically study the topographic and geomorphological characteristics of the northern Meizhou Bay and its influencing factors, the authors use the multi-beam system to detect the seafloor topography in the northern Meizhou Bay. Combined with the sediment and tidal current characteristics in the study area, the seafloor geomorphological characteristics and their genesis in this area are analyzed. The study area presents a topographic pattern with low middle and high north and south. The deep water area in the middle of the study area is characterized by deep inshore and shallow middle. The middle axis is a tidal channel, and the seafloor geomorphology features of shoals are developed on both sides of the waterway. The sediment components of the study area are mainly sand and silt. Because the fine sediment accounts for the main component in the surface sediments of the study area, the sediment has strong viscosity, and the measured data show that the tidal current velocity is small, so the seafloor sediment in the study area is difficult to be washed under the normal hydrodynamic conditions, and the change of seafloor topography is less affected by the tidal current. By comparing the survey results of the study area in 2012 and 2013, it is found that the overall change of seafloor topography in the study area is small, and the topographic fluctuation in individual areas varies greatly, which may be caused by artificial sand excavation, port dredging and other factors. Therefore, the main factor affecting the change of seafloor topography in the study area in the short term is human factor.
【作者單位】: 中國科學(xué)院海洋研究所中科院海洋地質(zhì)與環(huán)境重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);
【基金】:國家自然科學(xué)基金(41306132) 中國科學(xué)院戰(zhàn)略先導(dǎo)科技專項(xiàng)(XDA11030101,XDA11040305)~~
【分類號(hào)】:P737.2
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