波浪-海流-微地形耦合的沉積動(dòng)力模式建立及應(yīng)用
[Abstract]:Sand grain microtopography generally exists on the bottom of the sea, and the change of sand grain can change the bottom stress and then affect the sediment transport. The previous studies have focused on the sandstriation caused by Yu Bo, and have been applied to the calculation of the bottom friction of the wave model, but it has not been applied to the integrated hydrodynamic model and sediment transport model. In this paper, the sediment model of the University of New South Wales is embedded in the POM hydrodynamic model. A wave-current-microtopography (sand grain) coupled sedimentary dynamic model has been developed. In this paper, the model is applied to Jervis Bay, Australia. For the two types of wave-dominated and wav-current combined dominant sand stripes, the development state, geometric form distribution and suspended sediment simulation are carried out respectively. The results show that the wave-induced sand ripple has a higher wave height and wavelength than the wave-current combined effect, so the ripple plays a key role in suspended sediment when the wave is dominant. By considering the roughness with the variation of sand grain, the model can predict the concentration of suspended solids more accurately than the former model with uniform roughness.
【作者單位】: 中國海洋大學(xué)海洋與大氣學(xué)院;國家海洋局第一海洋研究所海洋環(huán)境科學(xué)和數(shù)值模擬國家海洋局重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金項(xiàng)目(41072176) 中央級(jí)公益性科研院所基本科研業(yè)務(wù)費(fèi)專項(xiàng)(2014T01,2015P03) 國家重點(diǎn)研發(fā)計(jì)劃課題(2016YFC0503602,2016YFB0201103,2017YFA0604101,2017YFA0604104) 留學(xué)回國人員科技活動(dòng)項(xiàng)目擇優(yōu)資助
【分類號(hào)】:P736.21
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