Continental shelves have generally been interpreted as drowned coastal plains associated with the allogenic effect of sea-level variation. Here, without disputing this mechanism we describe an alternative autogenic mechanism for subaqueous shelf formation, driven by the presence of dissolved salt in seawater and surface waves. We use a numerical model describing flow hydrodynamics, sediment transport, and morphodynamics in order to do this. More specifically, we focus on two major aspects: 1) the role of saltwater in the subaqueous construction of continental shelves and 2) the transformation of these shelves into seaward-migrating clinoforms under the condition of repeated pulses of water and sediment input and steady wave effects, but no allogenic forcing such as sea-level change. In the case for which the receiving basin contains fresh water of the same density as the sediment-laden river water, the hyperpycnal river water plunges to form a turbidity current that can run out to deep water. In the case for which the receiving basin contains sea water but the river contains sediment-laden fresh water, the hypopycnal river water forms a surface plume that deposits sediment proximally. This proximate proto-shelf can then grow to wave base, after which wave-supported turbidity currents can extend it seaward. The feature we refer to is synonymous with near-shore mud belts.

中文翻译：

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盐水和波浪在向海迁移的斜形陆架形成中的作用。

大陆架通常被解释为淹没的沿海平原，与海平面变化的同种异体效应有关。在这里，在不争辩这种机制的情况下，我们描述了由海水和地表波中溶解盐的存在驱动的水下架子形成的另一种自生机制。为了做到这一点，我们使用描述流动流体动力学，沉积物迁移和形态动力学的数值模型。更具体地说，我们集中在两个主要方面：1）盐水在大陆架水下建造中的作用； 2）在反复输入水和沉积物的脉冲和稳定波的条件下，这些架转变为向海迁移的斜形。影响，但没有异物强迫作用，例如海平面变化。如果接收盆地中的淡水密度与含沙河水的密度相同，则高比重河水会急速下降，形成浑浊的水流，并流至深水。如果接收流域盛有海水，而河流中盛有沉积物的淡水，则下流河水形成地表羽流，向近端沉积沉积物。然后，这个邻近的原型架可以长成波基，然后由波支撑的浊流将其向海延伸。我们所指的特征是近岸泥石带的代名词。下py河水形成地表羽流，向近端沉积沉积物。然后，这个邻近的原型架可以长成波基，然后由波支撑的浊流将其向海延伸。我们所指的特征是近岸泥石带的代名词。下py河水形成地表羽流，向近端沉积沉积物。然后，这个邻近的原型架可以长成波基，然后由波支撑的浊流将其向海延伸。我们所指的特征是近岸泥石带的代名词。