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本文以鄂尔多斯砒砂岩区5个旗市30年的气象资料为基础,详细分析了鄂尔多斯砒砂岩区土壤风—冻融侵蚀与自然气候因素的时空耦合性。运用随机统计理论,探讨了各旗市沙尘暴与降水量、地温变化率、大风等因素的相关关系。结果表明:沙尘暴的发生日数与大风日数、地温变化率正相关,与降水量负相关。少雨干旱及地温骤升骤降使得土壤结构松散,胶结力变差,为沙尘暴提供了物质基础;大风强度的急剧增加为沙尘暴的发生提供了动力;同时通过对上述内容的分析讨论,为后续砒砂岩区土壤风—冻融复合侵蚀机理研究提供基础依据。
Based on the 30-year meteorological data of the five flags in the Ordos sandstone area, the paper analyzes in detail the spatio-temporal coupling of soil wind-freeze-thaw erosion and natural climatic factors in the Ordos sandstone area. Using stochastic statistical theory, the correlation between dust storm and precipitation, the rate of change of ground temperature and gale are discussed. The results show that the number of days of sandstorm is positively correlated with the number of gale days, the rate of change of ground temperature, and the negative correlation with precipitation. The lack of dryness and sudden temperature dip caused the loose soil structure and the poor cementing power, which provided the material basis for sandstorms. The sharp increase of wind intensity provided motivation for the occurrence of sandstorms. At the same time, through the above analysis and discussion, Sandstone area soil wind - freeze-thaw compound erosion mechanism to provide the basis for the study.