基于三角模糊技术的河流水环境容量研究

CALCULATION OF RIVER WATER ENVIRONMENTAL CARRYING CAPACITY BASED ON TRIANGULAR FUZZY NUMBER

基于河流水环境系统的随机性、模糊性特征,以及资料信息的不足和不精确性,将水环境系统参数定义为三角模糊数。在此基础上,通过将常规的确定性模型参量模糊化,建立了河流水环境容量计算模糊模型。根据该模型,可以计算得到三角模糊数形式的河流水环境容量;再由给定的可信度水平要求,可以进一步将水环境容量由三角模糊数转化为区间值。实例研究表明,相对于常规的确定性方法,所得结果更为科学、合理,而且计算简单、操作方便,具有实用价值。

Based on the characteristics of fuzziness and impreciseness of river water system,and the lack of water environmental information,the parameters of river water environmental system are defined as triangular fuzzy numbers.On the basis,a fuzzy model for calculating river water environmental carrying capacity is established through fuzzifying the parameters in the conventional and certain model.From the model proposed above,the triangular fuzzy values of river water environmental carrying capacity are derived.According to the different required confidnece level α,the above river water environmental carrying capacity can be transformed from triangular fuzzy numbers into interval values.Study results show that the new model is more scientific and reasonable than that of conventional one.