全文获取类型
收费全文 | 586篇 |
免费 | 26篇 |
国内免费 | 8篇 |
专业分类
安全科学 | 18篇 |
废物处理 | 13篇 |
环保管理 | 129篇 |
综合类 | 115篇 |
基础理论 | 171篇 |
环境理论 | 3篇 |
污染及防治 | 107篇 |
评价与监测 | 33篇 |
社会与环境 | 24篇 |
灾害及防治 | 7篇 |
出版年
2023年 | 10篇 |
2022年 | 8篇 |
2021年 | 20篇 |
2020年 | 27篇 |
2019年 | 25篇 |
2018年 | 27篇 |
2017年 | 29篇 |
2016年 | 31篇 |
2015年 | 35篇 |
2014年 | 23篇 |
2013年 | 48篇 |
2012年 | 38篇 |
2011年 | 56篇 |
2010年 | 31篇 |
2009年 | 21篇 |
2008年 | 30篇 |
2007年 | 32篇 |
2006年 | 30篇 |
2005年 | 20篇 |
2004年 | 10篇 |
2003年 | 17篇 |
2002年 | 10篇 |
2001年 | 3篇 |
2000年 | 4篇 |
1999年 | 8篇 |
1998年 | 4篇 |
1997年 | 4篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有620条查询结果,搜索用时 31 毫秒
151.
152.
Mary Ann Rozance Diana Denham Sarah Kidd 《Journal of Environmental Policy & Planning》2020,22(3):413-427
ABSTRACTThe success of ecological restoration efforts is tightly coupled with the effectiveness of many U.S. environmental policies. Yet scholars have raised questions about the ability of restoration to produce intended results. We use a case study of tidal wetland restoration planning in Oregon to examine how neoliberal environmental governance exercises influence through a set of knowledge politics that produces subpar outcomes. We present three main findings: (1) restoration policies produce a restoration economy based on a conception of wetland as commodity (2) practitioners in this restoration economy exhibit competitive behavior resulting in a piecemeal rather than a landscape approach to restoration; and (3) limited monitoring prevents changes to existing policies. Practitioners offer insight into the challenge of treating wetlands as a commodity and call for more monitoring to challenge the assumptions of hegemonic knowledge practices that reinforce a neoliberal environmental governance regime. The divergent ideas of reflexive practitioners, though not yet manifest as action, show where changes to restoration governance might be possible. 相似文献
153.
Sarah Kandrot Val Cummins Declan Jordan Jimmy Murphy 《International Journal of Green Energy》2020,17(11):687-696
ABSTRACT The imminent development of a number of offshore wind farms in the Republic of Ireland presents a sizable opportunity to stimulate the Irish economy through the growth of an indigenous and globally competitive offshore wind supply chain. This study uses a value chain analysis to evaluate the economic and employment potential of the offshore wind sector for Ireland. The analysis is based on the expenditure on products and services required to develop an offshore wind farm, the planned capacity of projects in the pipeline, and the ability of Irish companies to supply the sector. Results suggest that by 2030, 2.5–4.5GW of domestic offshore wind development could create between 11,424 and 20,563 supply chain jobs and generate between €763 m and €1.4bn in gross value added. This is the first study to estimate domestic GVA potential for the sector. 相似文献
154.
Derek B. Booth James R. Karr Sally Schauman Christopher P. Konrad Sarah A. Morley Marit G. Larson Stephen J. Burges 《Journal of the American Water Resources Association》2004,40(5):1351-1364
ABSTRACT: Successful stream rehabilitation requires a shift from narrow analysis and management to integrated understanding of the links between human actions and changing river health. At study sites in the Puget Sound lowlands of western Washington State, landscape, hydrological, and biological conditions were evaluated for streams flowing through watersheds with varying levels of urban development. At all spatial scales, stream biological condition measured by the benthic index of biological integrity (B‐IBI) declined as impervious area increased. Impervious area alone, however, is a flawed surrogate of river health. Hydrologic metrics that reflect chronic altered streamflows, for example, provide a direct mechanistic link between the changes associated with urban development and declines in stream biological condition. These measures provide a more sensitive understanding of stream basin response to urban development than do treatment of each increment of impervious area equally. Land use in residential backyards adjacent to streams also heavily influences stream condition. Successful stream rehabilitation thus requires coordinated diagnosis of the causes of degradation and integrative management to treat the range of ecological stressors within each urban area, and it depends on remedies appropriate at scales from backyards to regional storm water systems. 相似文献
155.
Denis J. Sonwa Sarah Walker Robert Nasi Markku Kanninen 《Mitigation and Adaptation Strategies for Global Change》2003,8(4):415-416
Subject Index
Subject Index 相似文献156.
Cesium migration in Hanford sediment: a multisite cation exchange model based on laboratory transport experiments 总被引:1,自引:0,他引:1
Cs+ transport experiments carried out in columns packed with uncontaminated Hanford formation sediment from the SX tank farm provide strong support for the use of a multisite, multicomponent cation exchange model to describe Cs+ migration in the Hanford vadose zone. The experimental results indicate a strong dependence of the effective Cs+ Kd on the concentrations of other cations, including Na+ that is present at high to extremely high concentrations in fluids leaking from the Hanford SX tanks. A strong dependence of the Cs+ Kd on the aqueous Cs+ concentration is also apparent, with retardation of Cs+ increasing from a value of 41 at a Cs+ concentration of 10(-4) M in the feed solution to as much as 282 at a Cs+ concentration of 5x10(-7) M, all in a background of 1 M NaNO3. The total cation exchange capacity (CEC) of the Hanford sediment was determined using 22Na isotopic equilibrium exchange in a flow-through column experiment. The value for the CEC of 120 microeq/g determined with this method is compatible with a value of 121.9 microeq/g determined by multi-cation elution. While two distinct exchange sites were proposed by Zachara et al. [Geochim. Cosmochim. Acta 66 (2002) 193] based on binary batch exchange experiments, a third site is proposed in this study to improve the fit of the Cs+-Na+ and Cs+-Ca+ exchange data and to capture self-sharpened Cs+ breakthrough curves at low concentrations of Cs+. Two of the proposed exchange sites represent frayed edge sites (FES) on weathered micas and constitute 0.02% and 0.22% of the total CEC. Both of the FES show a very strong selectivity for Cs+ over Na+ (K(Na-Cs)=10(7.22) and 10(4.93), respectively). The third site, accounting for over 99% of the total CEC, is associated with planar sites on expansible clays and shows a smaller Na+-Cs+ selectivity coefficient of 10(1.99). Parameters derived from a fit of binary batch experiments alone tend to under predict Cs+ retardation in the column experiments. The transport experiments indicate 72-90% of the Cs+ sorbed in experiments targeting exchange on FES was desorbed over a 10- and 24-day period, respectively. At high Cs+ concentrations, where sorption is controlled primarily by exchange on planar sites, 95% of the Cs+ desorption was desorbed. Most of the difficulty in desorbing Cs+ from FES is a result of the extremely high selectivity of these sites for Cs+, although truly irreversible sorption as high as 23% was suggested in one experiment. The conclusion that Cs+ exchange is largely reversible in a thermodynamic sense is supported by the ability to match Cs+ desorption curves almost quantitatively with an equilibrium reactive transport simulation. The model for Cs+ retardation developed here qualitatively explains the behavior of Cs+ in the Hanford vadose zone underneath a variety of leaking tanks with differing salt concentrations. The high selectivity of FES for Cs+ implies that future desorption and migration is very unlikely to occur under natural recharge conditions. 相似文献
157.
Community involvement is fundamental to the management of multijurisdictional river basins but, in practice, is very difficult
to achieve. The Murray-Darling basin, in Australia, and the Mekong River basin in Southeast Asia are both cooperatively managed
multijurisdictional river basins where the management authorities have expressed an aim of community involvement. In the Murray-Darling
basin vigorous efforts have promoted a culture of community consultation throughout each of the state jurisdictions involved,
although true participation has not necessarily been achieved. In the Mekong basin the community is much more diverse and
the successes so far have been largely at the local level, involving action in subsections of the basin. These case studies
suggest that community involvement in the form of community consultation across large multijurisdictional river basins is
achievable, but more comprehensive participation is not necessarily possible. 相似文献
158.
Sarah Beckham Hooff Athanasios Kizos 《Environmental Communication: A Journal of Nature and Culture》2017,11(5):700-722
This research investigates the reception of the visual representations of a wind farm (WF) development by local stakeholders. Using non-verbal Qmethodology, residents of Lesvos’ island, Greece, sort images according to how these images represented their opinion about the proposed Aegean Link WF project. We found three opinion types. The “Risk Averter” type is focused on the various risks of constructing and operating the Aegean Link wind development. The “Green Developer” type believes that the renewable energy project will benefit both their local community and the environment. The “Realist” type defers to expert knowledge to make decisions about project outcomes and is sceptical of media bias. While the former two types seem to form their visual opinions based on whether they are in favour or against (respectively) of the WF development, the Realist opinion is rather guided by carefully considering whether the visual stimuli are representative of the project’s actual characteristics. 相似文献
159.
Li Maotian Finlayson Brian Webber Michael Barnett Jon Webber Sophie Rogers Sarah Chen Zhongyuan Wei Taoyuan Chen Jing Wu Xiaodan Wang Mark 《Regional Environmental Change》2017,17(4):1153-1161
Regional Environmental Change - Many of the world’s major cities are expected to face significant water shortages in coming decades, largely due to increased demand arising from economic and... 相似文献
160.
Sarah E. Crawford Catrina Brüll nee Cofalla Benedikt Aumeier Markus Brinkmann Elisa Classen Verena Esser Caroline Ganal Elena Kaip Roger Häussling Frank Lehmkuhl Peter Letmathe Anne-Katrin Müller Ilja Rabinovitch Klaus Reicherter Jan Schwarzbauer Marco Schmitt Georg Stauch Matthias Wessling Süleyman Yüce Markus Hecker Karen A. Kidd Rolf Altenburger Werner Brack Holger Schüttrumpf Henner Hollert 《Environmental Sciences Europe》2017,29(1):23
Protecting our water resources in terms of quality and quantity is considered one of the big challenges of the twenty-first century, which requires global and multidisciplinary solutions. A specific threat to water resources, in particular, is the increased occurrence and frequency of flood events due to climate change which has significant environmental and socioeconomic impacts. In addition to climate change, flooding (or subsequent erosion and run-off) may be exacerbated by, or result from, land use activities, obstruction of waterways, or urbanization of floodplains, as well as mining and other anthropogenic activities that alter natural flow regimes. Climate change and other anthropogenic induced flood events threaten the quantity of water as well as the quality of ecosystems and associated aquatic life. The quality of water can be significantly reduced through the unintentional distribution of pollutants, damage of infrastructure, and distribution of sediments and suspended materials during flood events. To understand and predict how flood events and associated distribution of pollutants may impact ecosystem and human health, as well as infrastructure, large-scale interdisciplinary collaborative efforts are required, which involve ecotoxicologists, hydrologists, chemists, geoscientists, water engineers, and socioeconomists. The research network “project house water” consists of a number of experts from a wide range of disciplines and was established to improve our current understanding of flood events and associated societal and environmental impacts. The concept of project house and similar seed fund and boost fund projects was established by the RWTH Aachen University within the framework of the German excellence initiative with support of the German research foundation (DFG) to promote and fund interdisciplinary research projects and provide a platform for scientists to collaborate on innovative, challenging research. Project house water consists of six proof-of-concept studies in very diverse and interdisciplinary areas of research (ecotoxicology, water, and chemical process engineering, geography, sociology, economy). The goal is to promote and foster high-quality research in the areas of water research and flood-risk assessments that combine and build off-laboratory experiments with modeling, monitoring, and surveys, as well as the use of applied methods and techniques across a variety of disciplines. 相似文献