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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Fine sediment transport model for river influenced microtidal shelf seas with application to the Thermaikos Gulf (NW Aegean Sea)
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Fine sediment transport model for river influenced microtidal shelf seas with application to the Thermaikos Gulf (NW Aegean Sea)

机译：受河流影响的潮汐架子海的精细泥沙输送模型及其在Thermaikos海湾（爱琴海西北部）的应用

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Modelling the transport of fine sediments in the marine environment is a highly complex task with a broad field of application. Various processes take place and interact with one another to determine the movement of fine sedimentary particles in the aquatic domain. Amongst these processes stratification significantly affects the vertical propagation of a sedimentary plume, especially in areas of freshwater influence, with the possibility of matter entrapment and accumulation along the interface; this possibility is higher the finer the sedimentary matter is. The proposed modelling approach describes the physical processes that take place in the water column (advection, dispersion, coagulation, settling, effects of stratification), at the boundary of the seabed (benthic shear) and the mass-exchanges between the two (deposition, consolidation, resuspension, erosion). The Fine Sediment Transport Model was applied in the gulf of Thermaikos (NW Aegean Sea), an area of significant freshwater and riverine sediment inflow, considering the major rivers of the domain as sources of particulate matter. The results were, generally, in agreement with available in-situ measurements of suspended particulate matter. In cases of significant deviations between simulation and measurement, the source of the error did not lie within the modelling approach, but was due to the considered input parameters. The investigation revealed the existence of transport and sedimentation patterns related to the riverine source of the material and the individual parts of the gulf. The sedimentation rates were estimated at 18, 7 and 3. mm/yr locally at the outflows of Aliakmon, Axios and Pinios, respectively, while the areas of high sediment accumulation coincided with locations where the benthic material ranges from very fine to fine silt.
机译：对海洋环境中细小沉积物的运输进行建模是一项非常复杂的任务，具有广泛的应用领域。发生各种过程并相互影响，以确定细小的沉积颗粒在水域中的运动。在这些过程中，分层显着影响了沉积羽流的垂直传播，尤其是在淡水影响的区域，有可能沿界面截留和积累物质。沉积物越细，这种可能性就越高。拟议的建模方法描述了在海床边界处（水底剪切）在水柱中发生的物理过程（对流，分散，凝结，沉降，分层效应）以及两者之间的质量交换（沉积，固结，重悬，侵蚀）。考虑到该地区的主要河流是颗粒物的来源，在Thermaikos（爱琴海西北部）的海湾中应用了精细泥沙输送模型，该地区是淡水和河流沉积物大量流入的地区。通常，结果与悬浮颗粒物的现场测量结果一致。如果模拟和测量之间存在重大差异，则误差的来源不在建模方法之内，而是由于考虑了输入参数。调查显示存在与该物质的河源和海湾各部分有关的运输和沉积方式。在Aliakmon，Axios和Pinios的出水口，当地的沉积速率估计分别为18、7和3 mm / yr。而高沉积物积聚的区域与底栖物质从极细到细粉质的位置相吻合。

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