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排序方式: 共有1408条查询结果,搜索用时 31 毫秒
921.
M. Yu. Semenov T. V. Khodzher V. A. Obolkin V. M. Domysheva L. P. Golobokova N. A. Kobeleva O. G. Netsvetaeva V. L. Potemkin R. Van Grieken N. Fukuzaki 《Chemistry and Ecology》2006,22(1):1-11
Data from 3-year-long observations on the chemical composition of precipitation, atmospheric gases, aerosols, soils, and surface waters at three monitoring stations in the Baikal region are presented. The stability of terrestrial ecosystems and surface waters to acidification has been estimated quantitatively. It has been shown that, unlike soils, surface waters of the Baikal watershed are more sensitive to acid deposition. The permissible acidity load for soils and surface waters of the territory varied from 0.30 to 20.00 keq ha-1 yr-1, whereas the maximal contemporary acidity load attains 0.50 keq ha-1 yr-1. 相似文献
922.
The inorganic anion pollution of the New Calabar River surface water was investigated. Results showed seasonal variations
in the inorganic anion levels. Water parameters such as sulfite, nitrate, phosphate, and alkalinity showed significantly higher
values in the rainy season than in the dry season. Dissolved oxygen, pH, sulfide, sulfate, ammonia, and nitrite showed no
significant differences between their rainy and dry season levels. Upstream-downstream changes were shown by conductivity,
total dissolved solids, chloride, salinity, and temperature. Exceptions occurred in the nitrite levels, where the effect was
minimal. Although the concentrations of some anions analyzed fell within internationally acceptable limits, the New Calabar
River water is, in the main, polluted with inorganic anions and may be unacceptable for potable and industrial uses without
treatment. 相似文献
923.
商住楼扰民噪声监测技术探讨 总被引:1,自引:0,他引:1
通过对贵阳市某商住楼内S超市的扰民噪声投诉处理,提出了在处理商住楼内商场、超市类项目扰民噪声投诉中经常面时的几个主要问题及处理建议,探讨了商住楼扰民噪声的监测技术. 相似文献
924.
Empirical Social-Ecological System Analysis: From Theoretical Framework to Latent Variable Structural Equation Model 总被引:2,自引:0,他引:2
Asah ST 《Environmental management》2008,42(6):1077-1090
The social-ecological system (SES) approach to natural resource management holds enormous promise towards achieving sustainability.
Despite this promise, social-ecological interactions are complex and elusive; they require simplification to guide effective
application of the SES approach. The complex, adaptive and place-specific nature of human-environment interactions impedes
determination of state and trends in SES parameters of interest to managers and policy makers. Based on a rigorously developed
systemic theoretical model, this paper integrates field observations, interviews, surveys, and latent variable modeling to
illustrate the development of simplified and easily interpretable indicators of the state of, and trends in, relevant SES
processes. Social-agricultural interactions in the Logone floodplain, in the Lake Chad basin, served as case study. This approach
is found to generate simplified determinants of the state of SESs, easily communicable across the array of stakeholders common
in human-environment interactions. The approach proves to be useful for monitoring SESs, guiding interventions, and assessing
the effectiveness of interventions. It incorporates real time responses to biophysical change in understanding coarse scale
processes within which finer scales are embedded. This paper emphasizes the importance of merging quantitative and qualitative
methods for effective monitoring and assessment of SESs. 相似文献
925.
926.
Global sustainability policies, such as the Sustainable Development Goals (SDGs) or the Aichi Targets, aim to ensure sustainable development, including improved human well-being and the conservation of nature. Although not yet explicitly used to evaluate the progress towards sustainable development, the ecosystem service concept implies a direct link between biodiversity and human well-being. This study explores how and which ecosystem services are currently considered in the SDGs and the Aichi Targets. We also identify which information might be already available for monitoring the progress towards their goals by reviewing national ecosystem assessments. This allows the identification of the main knowledge gaps for monitoring progress towards these global sustainability targets.There is a wealth of information on all major ecosystem services categories which is directly relevant for the Aichi Targets and the SDGs. The top 25% most cited ecosystem services across both policy documents are: Natural heritage and diversity, Capture fisheries, Aquaculture, Water purification, Crops, Cultural heritage & diversity and Livestock. Most monitoring information recommended for the global sustainability goals, as well as in the information available from national assessments, is biased towards supply related aspects of ecosystem services flows. In contrast, there is much less information on social behaviour, use, demand and governance measures. Indicators are rarely available for all aspects of a specific ecosystem service.The national statistical bureaus currently in charge of providing observations for reporting on SDGs, could be well placed to address this bias, by integrating ecological observations with socio-economic statistics into socio-ecological indicators for ecosystem services flows. IPBES can potentially address the gaps identified in this paper by improving coverage of the different dimensions of ecosystem services flows. 相似文献
927.
代红 《中国环境管理干部学院学报》2002,12(2):55-56
21世纪对质量提出了严格要求,本文从顾客满意入手进行分析,论述了只有高质量才能打造名牌产品,而名牌产品则是企业发展的基础,是企业财富的源泉。 相似文献
928.
绿肥可以解决有机肥源不足的困难,减少化肥用量,节省成本和能源消耗,改善土壤环境,提高土壤肥力和地力;提高作物产量和产品质量;促进畜牧业的发展。本文根据广东的实际,指出广东的现代化农业需要大种绿肥,也可以大种绿肥。要使广东的绿肥生产得到恢复和发展,必须抓好如下的措施:从战略高度来认识绿肥的重要性;加强领导,把它提到重要的议事日程上来;广泛开展试验示范,并加强宣传发动;增加经济投入,省、市、县各级要设立绿肥种子繁育和经营风险金。 相似文献
929.
本文概述了用于水质总体规划研究中的协调规划、协同游戏理论和存优汰劣等3种多指标决策方法。介绍了在常州市水质保护总体规划方案优化研究中应用多指标决策方法,在进行水质效益和费用分析基础上,确定最优的总体规划方案。 相似文献
930.