膨胀土蒸发过程的气候敏感性分析

Analysis of climatic sensitivity of expansive soil in evaporation process

膨胀土的工程特性对气候变化特别敏感。运用土体渗流和蒸发理论,建立了大气-非饱和土相互作用模型;以现场观测的气候数据作为边界条件,模拟分析了膨胀土柱蒸发过程中6个气象因子对蒸发的影响。研究结果表明,净辐射和风速对膨胀土蒸发影响显著,其它气象因子影响较小。

Engineering properties of expansive soils are very sensitive to climate changes. Based on the theory of the soil seepage and evaporation, an interaction model of atmosphere-unsaturated soil was established in this study. With field climate observations as the boundary conditions, the influence of 6 meteorological factors on the evaporation process of expansive soil column was simulated and analyzed. Results show that the most significant factors that influence the expansive soil evaporation are net radiation and wind speed, while other meteorological factors are less significant.