台特玛湖干涸湖盆风沙对公路潜在危害评价

The Wind-blown Sand Hazard Potential Evaluation of Highway on Dry up Lake-basin Region of Taitema Lake

风沙对公路危害能力定量评价,是沙区道路风沙灾害精准防治的重要基础。本文以台特玛湖干涸湖盆的S214省道为研究区,基于野外调查和定点观测数据,从致灾因子、孕灾环境和承灾体三个方面,建立了风沙对公路危害潜力评价模型。研究发现,台特玛湖干涸湖盆区4-10月为风沙活动强烈期,主风向为ENE、NE、E,起沙风向与合成输沙势方向一致,风沙活动强度呈由西部的荒漠化地区向东部的绿洲区减弱的趋势;基于评价模型对S214省道沿线的潜在风沙危害进行了评价,划分出不同危害强度等级的路段。本研究结果对该区S214省道沙害科学防治具有重要借鉴作用。

The quantitative evaluation of the hazard ability of wind-blown sand to highway is an important basis for the accurate prevention and control of sand disaster in the sand area.In this paper, we setthe road of S214 on dry lake-basin of Taitema Lake as the study area. Based on field investigation and fixed observation data, we build a model about the wind-blown sand hazard potential evaluation of highway from three aspects,hazard-formation factors, hazard-formation environment and hazard-affected bodies. The result shows that during the period from April to October in dry lake-basin of Taitema Lake, there was a strong period of wind-blown sand movement, with the main wind direction being ENE, NE, E. The direction of the wind-blown wind is consistent with synthetic of sediment transport. The intensity of wind-blown sand activity is decreasing from the desertification area in the west to the oasis in the East. Based on the evaluation model, we evaluate the wind-blown sand hazard potential along the road of S214, and divide the sections with different hazard intensity grades. The results of this study have animportant reference for the scientific prevention and treatment of sand damage in the road of S214.