地形对湖南省内污染物输送的动力作用

The Dynamic Effect of Topography on Pollutant Transport in Hunan Province

结合湖南地形走向， 从理论分析和实验两个方面着手研究了气流遇山时产生的受阻、爬越及绕流引起的平行于山的急流、过山后的类 “水跃”以及绕山后的右偏转对于污染物输送的动力作用， 科学地分析了散布在湘西、湘西南的污染源所排放的污染物沿山的走向在山的迎风面自北向南及自西向东输送从而造成湘东南的污染。而气流过山后的类 “水跃”现象对污染物有明显的垂直输送作用， 且绕流的右偏转使污染物向山的右侧输送， 危害了山右侧的自然景观及人类的活动。

Combining with Hunan province's topography distribution, in this paper, the pollutant transport of mountain-parallel jet induced by air flow damming in front of mountains, “quasi-hydraulic jump” after air flowing over the mountain and air flow deflecting around mountains is studied through both theoretical analyses and experiments in the laboratory The pollutants discharged by pollution sources scattered in the west and southwest Hunan province are transported by mountain parallel jet from north to south and from west to east along the mountains The “quasi-hydraulic jump” of air flow over the mountain transports pollutants vertically Air flow deflecting around mountains leads to transport pollutants to the right of the mountain lee side In that area, natural scenery and human activities are severely harmed