全文获取类型
收费全文 | 391篇 |
免费 | 2篇 |
国内免费 | 9篇 |
专业分类
废物处理 | 1篇 |
环保管理 | 115篇 |
综合类 | 43篇 |
基础理论 | 144篇 |
污染及防治 | 41篇 |
评价与监测 | 21篇 |
社会与环境 | 22篇 |
灾害及防治 | 15篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 7篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 6篇 |
2016年 | 11篇 |
2015年 | 3篇 |
2014年 | 4篇 |
2013年 | 17篇 |
2012年 | 12篇 |
2011年 | 20篇 |
2010年 | 10篇 |
2009年 | 22篇 |
2008年 | 44篇 |
2007年 | 33篇 |
2006年 | 14篇 |
2005年 | 12篇 |
2004年 | 19篇 |
2003年 | 17篇 |
2002年 | 9篇 |
2001年 | 15篇 |
2000年 | 17篇 |
1999年 | 14篇 |
1998年 | 11篇 |
1997年 | 6篇 |
1996年 | 13篇 |
1995年 | 5篇 |
1994年 | 6篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 5篇 |
1990年 | 7篇 |
1989年 | 1篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 3篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1974年 | 1篇 |
排序方式: 共有402条查询结果,搜索用时 250 毫秒
331.
332.
A.M. Kooijman I. Lubbers M. van Til 《Environmental pollution (Barking, Essex : 1987)》2009,157(11):3158-3165
Effects of high atmospheric nitrogen-deposition partly depend on availability of phosphate. Lime-poor, but iron-rich dune grasslands are supposedly protected from grass-encroachment, due to P-fixation in iron phosphate. However, in iron-rich Dutch hinterdunes, dunes have low, but dry former beach plains high grass-encroachment. To test whether these zones differ in nutrient availability, and whether this changed with duration of grass-encroachment, we measured net N-mineralization, microbial characteristics and different fractions of P and Fe from pioneer and shortgrass to tallgrass stages approximately 10, 20 and >25 years old. N-mineralization did not differ between zones, but increased in older tallgrass stages in the organic layer. P-availability was significantly lower in the low grass-encroachment zone, with SOM values below 3% and mineral Fe above 40% allowing for P-fixation in iron phosphates. In the high grass-encroachment zone, however, P-availability increased, because SOM increased and Fe became incorporated in organic matter complexes, with more reversible P-sorption. 相似文献
333.
Christian Toochi Egbuche Jia’en Zhang Okechukwu Ukaga 《Environment, Development and Sustainability》2009,11(4):905-928
Using institutional appraisal focused groups (FG) and participatory appraisals with Dillman Total Design Method (TDM), this
study examines community interaction with and utilization of wetland resources in Xinhui, Guangdong Province, China. Field
results show high commercial activities and corresponding impacts on coastal environment. Other interacting factors identified
include: legislation and ecosystem management, stakeholders’ participation, international guidelines criteria, and utilization
of mangrove resources in the region. Sensitivity index and community-based natural resources management collaboration comparison
percentile showed significant differences between cumulative distributions of respondents (D = 0.2568, P = 0.078). Likert statement of 11 sensitivity optional indexes in EMS of K–S test at 0.05 level of P = 0.078 also show significant differences in interaction between respondent groups and sensitivity factors. This indicates
a dysfunction between regional environmental management systems and CBNRM in Xinhui coastal district. Considering the high
tourism potential and economic quest of the region, there is the need for coordinated community enlightenment and further
studies on the social, ecological and economic value of wetland resources.
Readers should send their comments on this paper to: BhaskarNath@aol.com within 3 months of publication of this issue. 相似文献
334.
335.
Polychlorinated biphenyls (PCBs) in marine fishes from China: Levels, distribution and risk assessment 总被引:1,自引:0,他引:1
Muscle tissues of large yellow croakers (Pseudosciaena crocea) and sliver pomfret (Pampus argenteus) from nine coastal cities of East China including Dalian, Tianjin, Qingdao, Shanghai, Zhoushan, Wenzhou, Fuzhou, Quanzhou and Xiamen were analyzed for polychlorinated biphenyl (PCB) concentrations. Thirty-six PCB congeners were quantified in the fishes, of which 11 congeners were dioxin-like PCBs. The total PCB concentrations of the present study were at the low end of the global range, which may be related to the smaller usage and shorter consumption history of PCBs in China. PCBs 18, 29, 52, 66, 101, 104, 138, 153, 180 and 194 were the major constituents found in the fish samples. Regression analysis showed a strong positive correlation (R2 = 0.800; p < 0.001) between total dioxin-like PCBs and total PCB concentrations, and that total PCB concentrations explain 80% of the variability in total dioxin-like PCB concentrations. Among the species investigated, significantly higher concentrations of total PCBs were found in croakers than in pomfrets, which may be attributed to their different feeding and living habits. No significant difference in total PCB concentrations among the cities was observed; principal component analysis (PCA) of PCB profiles indicated that PCB pollution came from similar sources in the sampling areas and that there may be other PCB sources in Dalian and Wenzhou. The calculated carcinogenic risks (CRs) from the two species based on a low consumption group and high consumption group were all greater than 10−6, suggesting that daily exposure to dioxin-like PCBs via fish consumption results in a lifetime cancer risk of greater than one in one million. In contrast, the hazard quotients (HQs) of noncancer risks were all less than unity. 相似文献
336.
Stormwater ponds are commonly used in residential and commercial areas to control flooding. The accumulation of urban contaminants in stormwater ponds can lead to a number of water quality problems including high nutrient, chemical contaminant, and bacterial levels. This study examined the interaction between land use and coastal pond water quality in a South Carolina residential subdivision pond. Eutrophic levels of chlorophyll and phosphorus were present in all seasons. Harmful cyanobacterial blooms were prevalent during the summer months. Microcystin toxin and fecal coliform bacteria levels were measured that exceeded health and safety standards. Low concentrations of herbicides (atrazine and 2,4-D) were also detected during summer months. Drainage from the stormwater pond may transport contaminants into the adjacent tidal creek and estuary. A survey of residents within the pond's watershed indicated poor pet waste management and frequent use of fertilizers and pesticides as possible contamination sources. Educational and outreach activities were provided to community members to create an awareness of the water quality conditions in the pond. Pond management strategies were then recommended, and selected mitigation actions were implemented. Water quality problems identified in this study have been observed in other coastal stormwater ponds of varying size and salinity, leading this project to serve as a potential model for coastal stormwater pond management. 相似文献
337.
Manado is the largest and most densely populated coastal city in North Sulawesi Province, Indonesia. The city is facing problems of wastewater discharged from various sources. These problems are driven by high population pressure, increasing economic activity, and low household income, in combination with inadequate organizational structure of government institutions for addressing the wastewater problems as well as for law enforcement. There have been no community initiatives to prevent or mitigate wastewater problems. Therefore, a wastewater management plan is urgently needed to prevent and mitigate pollution caused by discharged wastewater. In this paper we analyze the current situation with respect to environmental state, sources and treatment of wastewater, socio-economic and institutional capacities as well as community awareness. Constraints and potentials are discussed to give recommendations for an integrated wastewater management plan for the city of Manado. 相似文献
338.
Protected Turkish areas in the Mediterranean region are compared with those of other Mediterranean countries. Policies followed
in Turkey for conservation protection of the natural and cultural environment and the use of coastal resources for tourism
are discussed. The purpose and application of Turkish law is examined with respect to the interaction between the protection
of coastal areas and tourism. Modifications on the administrative and management regulations in Turkey enabling a better use
of coastal areas is suggested by combining coastal tourism and protection. The necessity and importance of estabilishing and
managing Marine Parks in short-and long-term plans are acknowledged. 相似文献
339.
Education and public participation are recognized as important elements of coastal zone management. The current paper describes
the Uk’s largest public participation survey concerned with coastal issues. Coastwatch UK involves thousands of volunteers
in an annual survey of the coastline. The project has several aims—primarily to provide an insight into the major problems
and threats to the coastline and, through the involvement of volunteers, to raise public awareness and aid environmental education
at all levels. 相似文献
340.
In harm’s way: Non-migration decisions of people at risk of slow-onset coastal hazards in Bangladesh
Non-migration is an adaptive strategy that has received little attention in environmental migration studies. We explore the leveraging factors of non-migration decisions of communities at risk in coastal Bangladesh, where exposure to both rapid- and slow-onset natural disasters is high. We apply the Protection Motivation Theory (PMT) to empirical data and assess how threat perception and coping appraisal influences migration decisions in farming communities suffering from salinization of cropland. This study consists of data collected through quantitative household surveys (n = 200) and semi-structured interviews from four villages in southwest coastal Bangladesh. Results indicate that most respondents are unwilling to migrate, despite better economic conditions and reduced environmental risk in other locations. Land ownership, social connectedness, and household economic strength are the strongest predictors of non-migration decisions. This study is the first to use the PMT to understand migration-related behaviour and the findings are relevant for policy planning in vulnerable regions where exposure to climate-related risks is high but populations are choosing to remain in place.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-021-01552-8. 相似文献