全文获取类型
收费全文 | 418篇 |
免费 | 6篇 |
国内免费 | 9篇 |
专业分类
安全科学 | 7篇 |
废物处理 | 14篇 |
环保管理 | 50篇 |
综合类 | 72篇 |
基础理论 | 98篇 |
污染及防治 | 124篇 |
评价与监测 | 26篇 |
社会与环境 | 37篇 |
灾害及防治 | 5篇 |
出版年
2023年 | 3篇 |
2022年 | 7篇 |
2021年 | 4篇 |
2020年 | 6篇 |
2019年 | 13篇 |
2018年 | 11篇 |
2017年 | 21篇 |
2016年 | 15篇 |
2015年 | 14篇 |
2014年 | 21篇 |
2013年 | 23篇 |
2012年 | 25篇 |
2011年 | 21篇 |
2010年 | 22篇 |
2009年 | 19篇 |
2008年 | 19篇 |
2007年 | 36篇 |
2006年 | 18篇 |
2005年 | 18篇 |
2004年 | 13篇 |
2003年 | 16篇 |
2002年 | 17篇 |
2001年 | 13篇 |
2000年 | 8篇 |
1999年 | 5篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 4篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1964年 | 1篇 |
1962年 | 1篇 |
1960年 | 1篇 |
1956年 | 1篇 |
1954年 | 1篇 |
排序方式: 共有433条查询结果,搜索用时 62 毫秒
371.
372.
Kastner-Klein Petra Fedorovich Evgeni Ketzel Matthias Berkowicz Ruwim Britter Rex 《Environmental Fluid Mechanics》2003,3(2):145-172
The paper addresses the problem of the parameterisation of traffic induced turbulent motion in urban dispersion models. Results from a variety of full-scale and wind-tunnel studies are analysed and interpreted within a modelling framework based on scaling considerations. The combined effects of traffic and wind induced dispersive motions are quantified for different traffic situations (variable traffic densities, vehicle velocities and vehicle types) and incorporated into the developed parameterisations. A new dispersive velocity scale is formulated and recommendations regarding its application in urban dispersion models are given. The necessity of accounting for traffic induced air motions in predictions of street-canyon pollution levels is demonstrated. Further research is needed to verify the empirical constants in the proposed parameterisations and to generalize the developed approach for a broader range of urban building configurations, meteorological conditions, and traffic situations. 相似文献
373.
Horst Behrendt Matthias Kornmilch Dieter Opitz Oliver Schmoll Gaby Scholz 《Regional Environmental Change》2002,3(1-3):107-117
The nutrient discharges from point and diffuse sources in more than 200 German river basins were estimated for the periods
1983–1987 and 1993–1997 employing the MONERIS model. This model distinguishes between six diffuse pathways and point source
emissions from waste water treatment plants and direct industrial discharges. It was estimated that the total nitrogen input
into the German river systems amounts to about 819,000 t N year–1 in the period 1993 to 1997. These emissions have decreased since the mid-eighties by about 266,000 t N year–1, mainly caused by the reduction of point discharges. For phosphorus the emissions have been reduced by 56,290 t P year–1 and amount to 37,250 t P year–1 in the period 1993–1997. Based on emission data a retention module estimates riverine nutrient loads. The comparison of the
model output with the observed loads shows a deviation as low as 30% and 50% for nitrogen and phosphorus, respectively. The
regional resolution of the model indicates the relative importance of different pathways for phosphorus and nitrogen input
into river systems.
Electronic Publication 相似文献
374.
Daniel Michael Evan Dresel Charissa Chou Chris Murray Dick Gilbert Brent Pulsipher 《补救:环境净化治理成本、技术与工艺杂志》2000,10(2):19-44
Groundwater monitoring at Department of Energy's (DOE's) Hanford Site is a large, expensive undertaking serving multiple purposes, including compliance with regulations and DOE orders, remediation efforts under CERCLA, and sitewide risk evaluations. Like most large Federal facilities, the monitoring program currently in place has evolved and grown overtime as new requirements were established and groups were assigned to address them. DOE and its regulators simultaneously awakened to the fact that there was a need to reevaluate the monitoring activities at Hanford, to better integrate the program, to avoid duplicative sampling, to improve everyone's understanding of the performance of the network, and to evaluate whether adequate data could be collected for lower cost. This paper describes the approch that was developed to guide the rethinking effort with direct and extensive involvement of DOE, EPA, Washington Department of Ecology, Indian Tribes, and DOE Contractors, and how this approach was applied to a large portion of the site. Both the human element of the process (cultural change), as well as some of the technical details associated with the effort, including a flexible application of EPA's data quality objectives process, are discussed. 相似文献
375.
J. Hofmann H. Behrendt A. Gilbert R. Janssen A. Kannen J. Kappenberg H. Lenhart W. Lise C. Nunneri W. Windhorst 《Regional Environmental Change》2005,5(2-3):54-81
This paper presents a holistic strategy on the interaction of activities in the Elbe river basin and their effects on eutrophication in the coastal waters of the German Bight. This catchment–coastal zone interaction is the main target of the EUROCAT (EUROpean CATchments, catchment changes and their impact on the coast) research project, with the Elbe being one of eight case studies. The definition of socio-economic scenarios is linked with the application of models to evaluate measures in the catchment by estimation of nutrient emissions with MONERIS (MOdelling Nutrient Emissions in RIver Systems), and their effects on coastal waters with the ecosystem model ERSEM (European Regional Seas Ecosystem Model). The cost effectiveness of reduction measures will then be evaluated by application of the CENER model (Cost-Effective Nutrient Emission Reduction) and a multi-criteria analysis. Finally, the interpretation of ecological integrity is used as a measure to describe ecological impacts in an aggregated form. 相似文献
376.
Flurina Schneider Mariano Bonriposi Olivier Graefe Karl Herweg Christine Homewood Matthias Huss 《Journal of Environmental Planning and Management》2015,58(9):1577-1600
We present and test a conceptual and methodological approach for interdisciplinary sustainability assessments of water governance systems based on what we call the sustainability wheel. The approach combines transparent identification of sustainability principles, their regional contextualization through sub-principles (indicators), and the scoring of these indicators through deliberative dialogue within an interdisciplinary team of researchers, taking into account their various qualitative and quantitative research results. The approach was applied to a sustainability assessment of a complex water governance system in the Swiss Alps. We conclude that the applied approach is advantageous for structuring complex and heterogeneous knowledge, gaining a holistic and comprehensive perspective on water sustainability, and communicating this perspective to stakeholders. 相似文献
377.
378.
Rebeka Fisseha Matthias Saurer Maya Jäggi Rolf T.W. Siegwolf Josef Dommen Sönke Szidat Vera Samburova Urs Baltensperger 《Atmospheric environment (Oxford, England : 1994)》2009,43(2):431-437
Stable carbon isotope ratio (δ13C) data can provide important information regarding the sources and the processing of atmospheric organic carbon species. Formic, acetic and oxalic acid were collected from Zurich city in August–September 2002 and March 2003 in the gas and aerosol phase, and the corresponding δ13C analysis was performed using a wet oxidation method followed by isotope ratio mass spectrometry. In August, the δ13C values of gas phase formic acid showed a significant correlation with ozone (coefficient of determination (r2) = 0.63) due to the kinetic isotope effect (KIE). This indicates the presence of secondary sources (i.e. production of organic acids in the atmosphere) in addition to direct emission. In March, both gaseous formic and acetic acid exhibited similar δ13C values and did not show any correlation with ozone, indicating a predominantly primary origin. Even though oxalic acid is mainly produced by secondary processes, the δ13C value of particulate oxalic acid was not depleted and did not show any correlation with ozone, which may be due to the enrichment of 13C during the gas - aerosol partitioning.The concentrations and δ13C values of the different aerosol fractions (water soluble organic carbon, water insoluble organic carbon, carbonate and black carbon) collected during the same period were also determined. Water soluble organic carbon (WSOC) contributed about 60% to the total carbon and was enriched in 13C compared to other fractions indicating a possible effect of gas - aerosol partitioning on δ13C of carbonaceous aerosols. The carbonate fraction in general was very low (3% of the total carbon). 相似文献
379.
María Eugenia Ibarrarán Matthias Ruth Sanjana Ahmad Marisa London 《Environment, Development and Sustainability》2009,11(3):549-569
Commonly occurring natural events become natural disasters when they affect the population through death and injury, and/or
through the destruction of natural and physical capital on which people rely for their livelihood and quality of life. Climate
change plays a role in that it tends to increase the frequency and intensity of weather-related natural disasters. Additionally,
climate change may put people at risk by influencing access to water, coastal flooding, disease and hunger, and leaving them
with a more degraded environment, leading, in turn, to increased vulnerability. The purpose of this paper is to present a
review and synthesis of the literature and case studies addressing differential impacts of climate change-related natural
disasters on a society and its economy. Developed and developing countries show different vulnerabilities to natural disasters.
Even within countries, impacts vary significantly across population and economic sectors. When losses from natural disasters
are large, their cumulative effect can have notable macroeconomic impacts, which feed back to further pronounce existing income
inequalities and lower income levels. Impacts tend to be most pronounced for women, the young and elderly, and people of ethnic
or racial minorities.
相似文献
María Eugenia IbarraránEmail: |
380.
S. Lagauzère L. Pischedda F. Gilbert J.-M. Bonzom 《Environmental pollution (Barking, Essex : 1987)》2009,157(4):1234-1242
The diffusive oxygen uptake (DOU) of sediments inhabited by Chironomus riparius and Tubifex tubifex was investigated using a planar oxygen optode device, and complemented by measurements of bioturbation activity. Additional experiments were performed within contaminated sediments to assess the impact of uranium on these processes. After 72 h, the two invertebrate species significantly increased the DOU of sediments (13-14%), and no temporal variation occurred afterwards. Within contaminated sediments, it was already 24% higher before the introduction of the organisms, suggesting that uranium modified the sediment biogeochemistry. Although the two species firstly reacted by avoidance of contaminated sediment, they finally colonized it. Their bioturbation activity was reduced but, for T. tubifex, it remained sufficient to induce a release of uranium to the water column and an increase of the DOU (53%). These results highlight the necessity of further investigations to take into account the interactions between bioturbation, microbial metabolism and pollutants. 相似文献