共查询到17条相似文献,搜索用时 140 毫秒
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应用模糊综合评价的方法进行环境质量评价,能较传统方法提供更多信息。本文将模糊数学的方法首次应用于贡嘎山景区燕子沟景群区环境质量综合评价,选择线性模糊分布确定隶属函数,并采用标准加权法计算权重因子,以消除评价因子实测浓度的影响。分别采用两类算子模型进行评价,结果均表明评价区总体环境质量属于清洁型。 相似文献
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本文通过应用模糊综合指数法对伊宁市1990—1992年大气环境质量的综合评价,及与对照点大气环境质量的比较,进一步分析了伊宁市大气环境的污染程度和趋势,为今后的环境管理和决策提供参考资料。 相似文献
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环境质量是一个涉及多因素多层级的模糊概念,用经典数学进行环境质量评价,评判环境质量的等级只能用一个绝对判据来划分,无法处理模糊因素边界不清晰、中间过渡不分明的问题。本文应用模糊数学方法,在单环境因素模糊综合评价的基础上,进行了总体环境质量模糊综合评价的探讨,结合某区域环境实例,对其总体环境质量进行了模糊综合评价,并将评价结果与用经典数学评价结果进行了比较,比较表明,环境质量模糊评价方法较经典数学评价方法更客观更准确。 相似文献
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环境质量评价模糊集理论与模式研究 总被引:5,自引:0,他引:5
探讨了模糊集理论方法对环境质量评价的可行性,以大气环境质量评价为例,叙述了这种方法的研究程序及计算步骤。研究表明,采用模糊集理论方法对大气环境质量进行评价,结果结果合理,方法可行,有一定的参考价值。 相似文献
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基于模糊综合法评价新乡市大气环境质量 总被引:1,自引:0,他引:1
以新乡市"十一五"期间大气环境中二氧化硫、二氧化氮、可吸入颗粒物监测数据为依据,总结了这3种污染物的特征及变化趋势,并利用模糊综合评价法对大气环境质量进行了综合评价。根据关联度判断出新乡"十一五"期间大气环境质量均为Ⅱ级,环境质量优劣次序为:2010>2008>2009>2006>2007,与实际的污染程度相吻合,说明该评价方法具有客观性和准确性,为评价大气环境质量提供了科学依据。 相似文献
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河流水质评价中模糊数学评价法的应用与比较 总被引:8,自引:0,他引:8
选择2005年6个典型日(1月12日、3月10目、5月10日、7月13日、9月8日和11月10日)的水质,运用两种模糊数学评价法对浙江西苕溪流域港口断面的水质进行评价并作比较。第一种数学评价法采用较为简单的单因素模糊综合评价法,另一种采用多级模糊数学评价法。评价结果表明,1月12日、3月10日和11月10日的水质达到国家Ⅰ类水质标准;而5月10目的水质相对最差。比较两种评价方法,单因素模糊综合评价法对单个因素的影响敏感,特别是超标值对最后的相对隶属度贡献大;而多级模糊评价法综合各个因素来评价现状水质,因而反映出水质的综合情况。结合港口断面的特点分析水质变差的原因,结论是:流域农业劳作带来的面源污染物质进入港口断面使得该断面在农作高峰期水质较差;同时,断面的水资源短缺问题较为严重,导致水环境容量较小,污染物较难稀释扩散。 相似文献
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基于模糊综合评判法评价地下水环境质量的探讨——以新疆某市为例 总被引:1,自引:0,他引:1
模糊综合评判法是以模糊数学为基础,应用模糊关系合成的原理,将一些边界不清,不易定量的因素定量化,进行综合评价的一种方法。从其原理分析,在地下水环境质量评价方面可能取得更准确的结果。首先介绍了模糊综合评判法的计算步骤,然后以新疆某市2008年第4季度2个水质监测采样点的监测资料为依据,选择5种污染物为评价因子,运用模糊综合评判法进行运算,得出综合评价结果。评价结果表明,运用模糊综合评判法评价地下水质量是合理的,其评价结果能全面反映水质的综合状况。 相似文献
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《环境质量管理》2018,27(4):115-123
Environmental impact assessment (EIA) is an efficient method to recognize and alleviate the unfavorable and inevitable impacts of human activity on the environment. The EIA is dependent on expert opinions, which can be influenced by personal experience and knowledge. To evaluate this influence, we carried out EIA of 6,000 residential apartment units of Al‐A'amiriya, Baghdad, Iraq, using a revised Leopold matrix and fuzzy methods. The matrix results reflected the direct opinions of experts. The fuzzy method was developed according to the principles of expert comments. In the matrix method, the environmental impacts of each activity were evaluated by scores between −5 (very bad) to 5 (very good). The inputs to the fuzzy method were intensity and weather stability. The fuzzy estimation of the environmental impact was composed of a group of three values; P1 as the intensity, P2 as the extent, and P3 as the persistence. We gathered the expert opinions and used the Analytical Hierarchical Process to determine the weighting coefficient of each fuzzy anticipation. The matrix method was dependent on the expert opinions. The mean values of the matrix and P‐values in each column and row scores depict the impacts of a project on the environmental aspects and each element of construction on the environment. The comparison of the results indicated an average difference of 30% between the Leopold matrix and fuzzy methods. In regard to the availability and sufficiency of data, the difference was around 10%. 相似文献
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Status and fuzzy comprehensive assessment of combined heavy metal and organo-chlorine pesticide pollution in the Taihu Lake region of China 总被引:13,自引:0,他引:13
The status of combined heavy metal and organo-chlorine pesticide (OCPs; i.e. HCH and DDT) pollution was investigated and the soil environmental quality of the Taihu Lake watershed, one of the most developed regions in China, was evaluated using a fuzzy comprehensive assessment. Statistical analyses showed the presence of combined pollution in the soil. At many sampling sites, heavy metal concentrations were above corresponding background values, indicating the effects of extraneous pollutants. It has been over 20 years since China banned the use of OCPs, but they can still be found in soil samples of this region. HCH levels at all investigated sites were below the Chinese Environmental Quality Standard for Soils. Fuzzy comprehensive assessment showed that the overall soil quality in this region could be categorized as class I. Nevertheless, the high coefficients of variation for levels of DDT, Cd and Hg indicated the existence of some point-source pollution. Continuous monitoring and further studies of the region are recommended to prevent pollution of farmland from these sources. 相似文献