基于最大熵理论的黑土地土壤风蚀主导因子概率密度函数

Probability Density Function about the Maximum Entropy Theory of Black Land Soil Wind Erosion Dominating Factor

土壤风蚀是一个复杂的过程,影响因素众多。严重的土壤风蚀会引起土壤质地变粗,结构变坏,土壤肥力下降,可持续生产能力降低,尤其东北黑土地耕作土壤疏松,抗蚀能力弱,水土流失日趋严重。众多因子对风蚀结果的影响是一个随机连续的概率事件,最终结果反映在风蚀量上。一次土壤风蚀可看作各变量随机组合作用于地表土的连续分布事件。为了将事件明了化,引入最大熵原理对风蚀变量寻找其熵概率密度函数,而目前运用最大熵原理来研究土壤风蚀的相关成果甚少。该方法对风蚀建模的筛选模型变量具有重要意义。

Soil wind erosion is a complex process,it is affected by many factors. Serious soil wind erosion can cause soil texture, structures deteriorate,soil fertility deciine, sustainable production ability to reduce. Especially in the northeast tillage soil loosen, erosion resistance weak,soil and water loss is becoming more and more serious. The results of many factors on wind erosion is a random probability event, the final result reflects on the amount of wind erosion. A soil wind erosion can be combined as the random variables in overburden continuous distribution incident,in order to clear the incident,the introduction of the maximum entropy principle of wind erosion variables to find its entropy probability density function and using the maximum entropy principle to the relevant achievements of research is little on soil wind erosion. This method is of great importance in the screening model of variable wind erosion modeling.