Numerical study on snow erosion and deposition around an embankment with a snow fence under snowfall conditions

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research Pub Date : 2022-06-01 DOI:10.1016/j.aeolia.2022.100798

Sheng Yang , Mingyi Zhang , Wansheng Pei , Andrey Melnikov , Ze Zhang , Zhilang You

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引用次数: 7

Abstract

Snow drift which usually occurs in conjunction with snowfall can significantly alter the distribution pattern of snow cover around roads creating travel hazards for vehicles. To study the snow distribution around a road and evaluate the snow prevention efficiency of snow fence, based on the theories of two-phase flow and snowdrift erosion and deposition, a numerical model is developed. The model includes snowfall during snow drift, spatial distribution characteristics of wind speed and snow phase volume fraction, and dynamic changes of snow drift shape on the ground during drifting. We simulate the distribution characteristics of snowdrift around an embankment without and with the protection of a snow fence and under the conditions of no snowfall and snowfall. The results indicate that snow deposition is greatest on the leeward side of the embankment in comparison to the windward side of the embankment and takes a longer time to reach equilibrium. On the leeward side of the embankment, the snow accumulation rate under the condition of snow falling is higher than that under the condition of no snow falling. Nonetheless, the two conditions both suggest that installation of the snow fence intercepts a large amount of snow behind the snow fence, decreases the snow phase volume fraction near the ground, and reduces the snowdrift accumulation on the leeward side of the embankment within a certain period.

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降雪条件下带雪栅栏路堤积雪侵蚀与沉积的数值研究

积雪漂移通常与降雪同时发生，可以显著改变道路周围积雪的分布模式，给车辆带来行驶危险。基于两相流理论和雪堆侵蚀与沉积理论，研究道路周围积雪分布，评价雪栅防雪效果，建立了数值模型。该模型包含了积雪漂移过程中的降雪量、风速和雪相体积分数的空间分布特征以及漂移过程中地面上积雪形状的动态变化。模拟了无雪栅栏和有雪栅栏保护路堤周围、无降雪和降雪情况下的积雪分布特征。结果表明:路堤背风侧积雪量最大，达到平衡所需时间较长;在路堤背风侧，降雪条件下的积雪率高于不降雪条件下的积雪率。尽管如此，这两种情况都表明，雪栅栏的安装拦截了雪栅栏后面的大量积雪，降低了地面附近的雪相体积分数，并在一定时期内减少了路堤背风侧的雪堆堆积。

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来源期刊

Aeolian Research GEOGRAPHY, PHYSICAL-

CiteScore

7.10

自引率

6.10%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Aeolian Research includes the following topics: • Fundamental Aeolian processes, including sand and dust entrainment, transport and deposition of sediment • Modeling and field studies of Aeolian processes • Instrumentation/measurement in the field and lab • Practical applications including environmental impacts and erosion control • Aeolian landforms, geomorphology and paleoenvironments • Dust-atmosphere/cloud interactions.