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1.
María L. Pignata Martha S. Cañas Hebe A. Carreras Liliana Orellana 《Environmental management》1997,21(5):793-801
Ligustrum lucidum Ait. f. tricolor (Rehd.) Rehd. in relation to atmospheric pollutants in Córdoba city, Argentina. The study area receives
regional pollutants and was categorized taking into account traffic level, industrial density, type of industry, location
of the sample point in relation to the street corner, treeless condition, and topographic level. Dried weight/fresh weight
ratio (DW/FW) and specific leaf area (SLA) were calculated, and concentrations of chlorophylls, carotenoids, total sulfur,
soluble proteins, malondialdehyde (MDA), and hydroperoxy conjugated dienes (HPCD) were determined in leaf samples. Sulfur
content correlates positively with traffic density and SLA correlates negatively with some combinations of the categorical
variables; MDA correlates positively with topographic level and total protein concentration correlates negatively with treeless
condition. On the basis of our results, traffic, location of trees, type of industry, situation of a tree with respect to
others, and topographic level are the environmental variables to bear in mind when selecting analogous sampling points in
a passive monitoring program. An approximation to predict tree injury may be obtained by measuring DW/FW ratio, proteins,
pigments, HPCD, and MDA as they are responsible for the major variability of data. 相似文献
2.
如何说清区域环境质量状况,是一个摆在环境监测战线上工作人员面前的新课题。本文认真分析了当今环境监测工作中存在的问题,提出环境监测工作要随着形势的变化,与时俱进、开拓创新,开展区域环境质量的监测和评价工作,更好地为环境管理和经济建设服务。 相似文献
3.
A. Haurie J.J.E. Kübler A. Clappier H. van den Bergh 《Environmental Modeling and Assessment》2004,9(1):1-12
A method is proposed to build integrated models (also called Metamodels) aimed at quantifying the economic efficiency of air quality policies. This Metamodeling approach is based on the coupling of two complementary models, that operate at different scales in space and time, and which represent the economic and the physical and chemical processes, respectively. The joint consideration of the physico-chemical and techno-economic structure of the pollution control problems permits a comprehensive evaluation of air pollution abatement strategies. The motivating pollution control problems include urban-regional air quality management through efficient energy and traffic control policies. A pilot study, exploiting data collected in the Geneva canton (Switzerland), is used to demonstrate the potential of the approach. 相似文献
4.
伊犁河伊宁市段水质污染特征分析 总被引:2,自引:1,他引:2
在对伊犁河伊宁市段历年水质状况进行综合评价的基础上,探讨了城市河段水质的变化规律、污染特征和成因。 相似文献
5.
结合环境监测实验实质量控制数据处理的实际要求,用计算机高级语言,设计开发成功了《精密度-偏性分析质控试验数据处理系统》,该系统具有数据输入,查询,修改,统计分析和打印报告等功能,在实际应用中,取得良好效果。 相似文献
6.
In this study, the relation between sulfur dioxide (SO2) and particulate matter (PM) concentrations periodically measured in the city of Afyon’s atmosphere with meteorological factors
such as precipitation, humidity, temperature, wind velocity, and inversion were investigated. The mean values of SO2 and PM concentrations measured during the winter months of October–March 1990–1999 were correlated with the meteorological
parameters of the same period. Simple and multiple linear regression analysis were utilized to evaluate the contribution of
meteorological variables. The statistical results show that the pollutants, i.e., SO2 and PM are dependent upon humidity, temperature, and inversion at the 1% significance level; while the dependence of both
pollutants with temperature is negative when those of humidity and inversion are positive. Two models in which temperature
and inversion are dependent with multiple variables are recommended for predicting the contribution of meteorological parameters
on SO2 and PM. In addition, the relationship between humidity, temperature, and inversion with pollutants is also determined using
nonlinear (polynomial) models. 相似文献
7.
8.
采用间隔流动注射的方法对水质中的氰化物进行检测。通过选择合适的锌盐和关闭的紫外灯,将总氰模块应用于易释放氰化物的检测。结果表明,仪器测定的总氰和易释放氰化物的精密度、准确度和加标回收率均满足水质检测的质量控制要求。 相似文献
9.
博乐市空气质量变化趋势分析 总被引:2,自引:0,他引:2
分析了博乐市2001-2005年空气质量监测数据在不同月份、不同年份、不同污染因子的变化趋势,并结合当地能源结构、地理位置、气候特征、城市环境综合发展水平。指出影响博乐市空气质量的主要因素,为防治或减轻博乐地区的空气污染提供了科学依据。 相似文献
10.
Culturable heterotrophic bacterial and phytoplanktonic densities were investigated at four sites in the Southern Adriatic Sea (Brindisi, S. Cataldo, Otranto and S. M. di Leuca) over an annual cycle. The main phytoplankton groups, the bacterial biodiversity, as well as the faecal contamination indicators were determined. Culturable bacterial numbers averaged 4.8 ± 0.2 log CFU ml−1 whereas phytoplankton numbers averaged 2.1 ± 0.4 log cells ml−1. Relationships between culturable bacteria, phytoplankton and the environmental factors were established. Bacterial and phytoplankton densities usually depended significantly on temperature, dissolved oxygen, phosphate and nitrite only in the S. Cataldo transect. In all the examined transects phytoplankton showed a bloom during the January–February period followed by a bacterial peak during the February–March period. Thus we can suppose that the phytoplankton winter bloom is responsible for the availabily of organic matter for bacterial populations in the following months in this oligotrophic ecosystem. 相似文献