共查询到18条相似文献,搜索用时 78 毫秒
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根据2017—2021年海沧湖湖区内9个监测点位的监测数据,分析了监测点位、年际变化、季节变化对海沧湖各水质指标的影响,并且使用单因子污染指数法和内梅罗污染指数法对海沧湖水质进行评价。监测数据显示,2017—2021年海沧湖整体及各监测点位污染物质量浓度呈现总体下降的趋势,冬季污染物质量浓度要低于夏季,单因子污染指数法和内梅罗污染指数法2种方式评价结果均显示2021年海沧湖水质比前4年有明显提升。 相似文献
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为更好地实现锦州主城区内各饮用水水源的水质评价,结合锦州市地下水环境现状对指标权重进行调整,主要应用单因子评价法、模糊综合评价法、主成分分析及灰色关联分析四种评价方法,对锦州主城区内四个水源的水质情况分别进行评价,并对评价结果进行对比和分析,最终筛选出最适宜锦州城市饮用水水源的评价方法。 相似文献
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比较单因子法与综合污染指数法两种水质评价方法,得出在实际应用中,应结合两种方法对水体进行综合评价更为客观、科学的结论。 相似文献
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以沙澧河漯河段3个断面2006-2009年的水质监测数据为基础,应用综合水质指数法,对沙澧河漯河段水质状况进行了分析与评价.将参与评价的项目分为3类:对人体危害严重且难以消除的污染物(第一类)、处理后容易达标的污染物(第二类)、其他污染物(第三类).评价结果表明,澧河水质优良并保持相对稳定;沙河水质稍差,但由尚好逐渐向... 相似文献
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《Planning》2019,(6):631-636
提出了新的农业信息化水平评价方法,以主成分分析法、综合指数法及波拉特法为基础,通过组合赋权,建立了农业信息化水平非线性加权综合评价模型.以酉阳县2006年至2017年的数据为例,综合评价其农业信息化水平,并对比分析了单一测算法与综合评价法的测算结果.经相关性分析表明酉阳县农业信息化水平与农业总产值显著相关,从而提出了促进酉阳县农业发展的指导性建议. 相似文献
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为进一步提高地下综合管廊施工安全管理水平,从地下综合管廊施工的全过程出发,提出了基于改进CRITIC-G1与改进可拓物元的地下综合管廊施工安全管理评价方法.首先,运用主成分分析法对安全管理影响因素集合进行降维处理,构建了人、设备材料、安全技术、安全措施、环境5个方面的地下综合管廊施工安全管理评价体系.其次,将改进CRITIC理论引入G1赋权法中,用指标的信息量替换指标的相对程度赋值,优化指标的赋值过程,构造了改进CRITIC-G1综合赋权法,并结合改进可拓物元理论建立了地下综合管廊施工安全管理评价模型.最后,运用该模型对青岛市高新区地下综合管廊项目施工安全管理效果进行了实例验证,通过计算得到该项目的施工安全管理评价为良好,验证了该模型在地下综合管廊施工安全管理方面的可行性,以期为后续类似项目提供参考. 相似文献
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对松花江流域黑龙江控制区段13个监测断面不同水期的水质指标进行主成分分析,以鉴别主要的污染源,进而提出有针对性的水污染控制对策。结果表明,BOD5、COD、TP、TN为主要污染指标,合计贡献率为49. 529%,首要污染源为生活污水与农业废水。第二大污染指标主要为石油类、阴离子表面活性剂、氰化物,主要来源于工业废水。总污染最严重的主要是阿什河口内平水期与龙安桥平水期。龙安桥平水期等对应的河流区段受生活污水及农业废水污染较为严重,苗家平水期等对应的河流区段受工业污染较为严重。 相似文献
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Toochukwu Chibueze Ogwueleka 《Water and Environment Journal》2014,28(1):31-37
Exploratory data analysis such as hierarchical cluster analysis and principal component analysis were applied to water quality dataset of the Kaduna River, obtained during 3 years (2008–2010), monthly monitoring of eight key different sampling sites for 19 parameters to extract correlations and similarities between variables and to classify river sampling sites in groups of similar quality. Hierarchical cluster analysis grouped eight sampling sites into three statistically significant clusters of similar water composition. Six varifactors were obtained after varimax rotation of initial principal components using principal component analysis. These techniques gave an insight into the sources of pollution. Anthropogenic influence (municipal, industrial wastewater and agricultural run‐off) was the major source of river water pollution. 相似文献
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The Government has announced its wishes to gradually introduce statutory water quality objectives in pilot catchments, commencing in late 1993. The River Cam is one of the catchments under consideration.
The paper describes the main physical features of the River Cam and its uses, which include salmonid and cyprinid fisheries, agricultural and industrial abstraction, and recreational pursuits.
Significant sewage and industrial discharges in the catchment, and their impact on water quality, are discussed, and current river quality is compared with established river quality objectives, EC requirements and proposed statutory water quality objectives. Procedures for setting the latter objectives are considered, together with monitoring and compliance assessment. Future effluent discharge standards are proposed, and options to achieve long-term water quality targets are suggested as part of a catchment management action plan. 相似文献
The paper describes the main physical features of the River Cam and its uses, which include salmonid and cyprinid fisheries, agricultural and industrial abstraction, and recreational pursuits.
Significant sewage and industrial discharges in the catchment, and their impact on water quality, are discussed, and current river quality is compared with established river quality objectives, EC requirements and proposed statutory water quality objectives. Procedures for setting the latter objectives are considered, together with monitoring and compliance assessment. Future effluent discharge standards are proposed, and options to achieve long-term water quality targets are suggested as part of a catchment management action plan. 相似文献