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鄂西南民族地区县域经济实力综合评价 总被引:1,自引:0,他引:1
《资源开发与市场》2016,(3)
从总量规模、人均水平、发展速度、发展潜力四个方面遴选18项指标,构建了县域经济实力评价指标体系。以湖北省平均水平为依据,确定了各项指标的基准值;借助专家咨询和层次分析方法确定了各项指标的权重,构建了县域经济实力评价模型。采用该模型对鄂西南民族地区10县(市)县域经济实力进行了评价,结果表明:恩施市、利川市、巴东县、五峰县的综合经济实力略高于全省平均水平,其他6县未达到全省平均水平。 相似文献
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以云县为评价对象,基于ArcGIS软件的强大空间分析功能,采用层次分析法对耕地地力进行评价。评价结果显示:云县没有1级耕地分布,2~4级耕地有少量分布,占全县耕地8.23%;5~10级耕地分布较广,占全县耕地91.77%,云县耕地质量在国家标准地力等级体系中处于中等偏下水平。 相似文献
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马尔柯夫法在耕地质量动态评价中的应用 总被引:6,自引:0,他引:6
根据随机过程原理,构建了新的转移矩阵,建立了一个马尔柯夫链综合耕地质量评价模型.通过实例的应用,分析证明了其模型的可靠性,从而为耕地质量动态评价的科学化提供了依据. 相似文献
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耕地质量指标体系的构建 总被引:8,自引:0,他引:8
根据土地质量的概念及其影响因素,构建了耕地质量指标体系。认为耕地质量的影响因素包括自然、社会和经济因素,而PSR(压力——状态——响应)框架则是构建耕地质量指标体系的最佳思路。在此基础上提出具体评价指标,其中生态功能指标体系包括土壤质量、气候质量、生物多样性质量和景观生态质量,生产功能指标体系(即耕地生产力)则通过耕地生产潜力、耕地基础地力和耕地现实生产力进行评价。 相似文献
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《中国环境管理干部学院学报》2016,(1)
为了解三门峡市蔬菜种植基地土壤的重金属和有机污染物的污染状况,选取卢氏县、渑池县和灵宝市三个不同蔬菜种植基地进行监测,采集15个土壤样品,采用单因子和综合污染指数法对土壤的3项理化指标、14项重金属和6项有机污染物进行分析评价。结果表明:三个蔬菜种植基地土壤p H值范围在6.59~7.27之间,均为中性土壤;各监测因子单项污染指数(Pi)≤1,土壤环境质量评价等级均为Ⅰ级,无污染;综合评价土壤污染等级均为清洁(安全)。 相似文献
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本文提出了以区域持续发展的能力作为区域生态环境预警的综合指标,进一步用承载力、稳定性、缓冲力、生产力和调控力作为衡量区域持续发展的能力。选取生态、环境和社会经济指标对区域生态环境质量进行评价,以及对经济发展的协调性和适应性进行分析,作出判断和预警,并讨论了区域生态环境预警的综合方法。 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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