风沙边界层动力学研究现状及面临的问题

Current Situation and Existing Problems in the Study on the Dynamics of Blown-sand Boundary Layer

风沙问题日益严重 ,以大气边界层内风沙活动特征及其相互反馈耦合作用为主要内容的大气边界层动力学显得愈来愈重要。简要阐述了风沙边界层动力学研究现状 ,提出了目前急需解决的主要问题 。

An atmospheric boundary layer or planetary layer forms because a thin atmospheric layer under the lower part of the troposphere and 1.2～1.5 km above the ground is affected by the ground surface. Most of the sand raising, transport and sediment of blown sand occur in this atmospheric layer. The study on the dynamics of blown sand boundary layer includes mainly the microcosmic research on the movement characteristics of single sand particle and the macroscopical research on the movement characteristics of blown sand current. Blown sand disasters become more and more serious, and it is very important to develop the dynamics of blown sand boundary layer, which is dominated by the characteristics of blown sand movement and the interaction in the atmospheric boundary layer. In this paper, the current situation of the study on the dynamics of blown sand boundary layer is briefly discussed, and some existing problem needing to be urgently settled are analyzed.