Subjects: Geosciences >> Geography submitted time 2024-03-01 Cooperative journals: 《干旱区研究》
Abstract： The dynamic wind environment characteristics on the east and west sides of the Shashangou Bridgeused by the Dunge Railway were investigated using field observations, indoor analysis, and CFD numericalsimulations. The results show that the sand-driving winds on the east and west sides of Shashangou Bridge weremainly NW and WNW winds in the spring and summer, and SE and S winds in the autumn and winter. Theannual sand transport potential on the west side of Shashangou Bridge is 284.19 VU, which indicates a mediumwind energy environment. The sand transport potential was determined to be 27.4 VU, and the sand transportwith the wind direction was 124° . The directional variability index is 0.10, which indicates a small ratio andvariable wind direction. The sediment transport potential on the east side of Shashangou Bridge is 31.24 VU,indicating a low wind energy environment. The results of the sediment transport potential were 8.97 VU, whilethe results of the sediment transport wind direction were 91° , and the directional variability index was 0.29,indicating a medium ratio. The average wind speed, frequency of sand-driving wind, sand transport potential, andresultant sand transport potential on the west side of Shashangou Bridge were larger, indicating that themonitoring and control of sand damage on the west side of the bridge should be improved. According to thecharacteristics of the wind dynamic environment on the west side of the bridge when combined with the flowingdune, the numerical simulation analysis results show that the wind speed in the overhead area and bridge deck isgreater than the sand- driving wind speed, and the sand transport capacity was strong, indicating that sandaccumulation does not readily occur. However, with the advance of sand dunes, the possibility of sandaccumulation at the bottom of the bridge and wind sand on the rail increases.
Subjects: Geosciences >> Geography submitted time 2021-08-01 Cooperative journals: 《干旱区地理》
Abstract： 乌玛高速公路是《国家公路网规划》中内蒙古乌海至青海玛沁高速公路的简称，对宁夏自 治区沿黄经济带发展有着重要意义。通过野外观测和实地考察，对乌玛高速公路腾格里沙漠段风 能环境、沙丘类型、地表沉积物进行分析。研究表明：观测期间年平均风速 2.86 m·s-1，大于起沙风 年均风速为 6.23 m·s-1；起沙风以 5~9 m·s-1 为主，占比达 96.36%；主导风向为 NW-NNW 和 E-ESE。 沿公路自 NE 向 SW 方向，输沙势和最大可能输沙量呈减小趋势。公路两侧沙丘以流动沙丘为主， 沙丘类型包括格状沙丘和线性沙垄等。在风力作用下，格状沙丘主梁沿 NE-SW 延伸，沙丘高度自 NE 向 SW 方向呈增高趋势。公路沿线沙丘表层沉积物以中沙和细沙为主，分选性较好，偏度为正 偏或极正偏，中等和宽峰态分布。
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