全文获取类型
收费全文 | 920篇 |
免费 | 15篇 |
国内免费 | 53篇 |
专业分类
安全科学 | 61篇 |
废物处理 | 15篇 |
环保管理 | 237篇 |
综合类 | 287篇 |
基础理论 | 73篇 |
污染及防治 | 145篇 |
评价与监测 | 87篇 |
社会与环境 | 46篇 |
灾害及防治 | 37篇 |
出版年
2024年 | 3篇 |
2023年 | 9篇 |
2022年 | 16篇 |
2021年 | 28篇 |
2020年 | 32篇 |
2019年 | 15篇 |
2018年 | 16篇 |
2017年 | 31篇 |
2016年 | 38篇 |
2015年 | 21篇 |
2014年 | 44篇 |
2013年 | 35篇 |
2012年 | 43篇 |
2011年 | 87篇 |
2010年 | 31篇 |
2009年 | 64篇 |
2008年 | 76篇 |
2007年 | 48篇 |
2006年 | 48篇 |
2005年 | 22篇 |
2004年 | 32篇 |
2003年 | 29篇 |
2002年 | 23篇 |
2001年 | 20篇 |
2000年 | 24篇 |
1999年 | 23篇 |
1998年 | 12篇 |
1997年 | 19篇 |
1996年 | 12篇 |
1995年 | 12篇 |
1994年 | 16篇 |
1993年 | 3篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 8篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1983年 | 4篇 |
1982年 | 3篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1977年 | 1篇 |
1973年 | 2篇 |
排序方式: 共有988条查询结果,搜索用时 62 毫秒
191.
Benoît Gabrielle Jeanne Da-Silveira Sabine Houot Joël Michelin 《Agriculture, ecosystems & environment》2005,110(3-4):289-299
Composting has emerged as a valuable route for the disposal of urban waste, with the prospect of applying composts on arable fields as organic amendments. Proper management of urban waste composts (UWC) requires a capacity to predict their impacts on carbon and nitrogen dynamics in the field, an issue in which simulation models are expected to play a prominent role.Here, we used a deterministic soil-crop model to simulate C–N dynamics in an arable field amended with three types of UWC (green waste and sludge, biodegradable waste, and solid waste), and a reference amendment (farmyard manure). The model is a version of CERES in which the soil C–N module was substituted with the NCSOIL model, whose microbiological parameters were determined from either laboratory incubation data or biochemical fractionation in a previous paper. CERES was tested against data from a field trial set up in 1998 in the Paris area, and managed as a maize (Zea mays L.)–wheat (Triticum aestivum L.) rotation. Comparison of observed and simulated data over the first 4 years of the field trial showed that CERES predicted the soil moisture and inorganic N dynamics reasonably well, as well as the variations in soil organic C. In particular, the parameterization of UWC organic matter from biochemical fractions achieved a similar fit as the parameterization based on incubation data. Wheat yields were also correctly predicted, but a systematic under-estimation of maize yields pointed at an under-estimation of spring and summer mineralization of N by CERES.Simulated N fluxes showed that the organic amendments induced an additional leaching ranging from 1 to 8 kg N ha−1 yr−1, which can be related to the initial mineral N content of the amendments. After 4 years, the composts had mineralized 3–8% of their initial organic N content, depending on their stability. Composts with slower N release had higher N availability for the crops. CERES could thus be used to aid in selecting the timing of compost application, in relation to its stability, based on both environmental and agronomical criteria. 相似文献
192.
协同论、城市生态学及苏州河综合整治 总被引:1,自引:0,他引:1
从协同论和城市生态学的角度,对苏州河综合整治的定义、目的、方式进行了阐述了探讨。 相似文献
193.
194.
介绍了沈阳可持续发展项目并探讨了该项目对沈阳市实施可持续发展的影响,突出了实施可持续发展战略对沈阳的影响,并对如何实施沈阳可持续发展战略、做好沈阳可持续发展项目提出了建议. 相似文献
195.
196.
《环境科学学报(英文版)》2023,35(3):513-523
Traditional air quality data have a spatial resolution of 1 km or above, making it challenging to resolve detailed air pollution exposure in complex urban areas. Combining urban morphology, dynamic traffic emission, regional and local meteorology, physicochemical transformations in air quality models using big data fusion technology, an ultra-fine resolution modeling system was developed to provide air quality data down to street level. Based on one-year ultra-fine resolution data, this study investigated the effects of pollution heterogeneity on the individual and population exposure to particulate matter (PM2.5 and PM10), nitrogen dioxide (NO2), and ozone (O3) in Hong Kong, one of the most densely populated and urbanized cities. Sharp fine-scale variabilities in air pollution were revealed within individual city blocks. Using traditional 1 km average to represent individual exposure resulted in a positively skewed deviation of up to 200% for high-end exposure individuals. Citizens were disproportionally affected by air pollution, with annual pollutant concentrations varied by factors of 2 to 5 among 452 District Council Constituency Areas (DCCAs) in Hong Kong, indicating great environmental inequities among the population. Unfavorable city planning resulted in a positive spatial coincidence between pollution and population, which increased public exposure to air pollutants by as large as 46% among districts in Hong Kong. Our results highlight the importance of ultra-fine pollutant data in quantifying the heterogeneity in pollution exposure in the dense urban area and the critical role of smart urban planning in reducing exposure inequities. 相似文献
197.
198.
以厦门市为对象开展的城市环境信息系统的试验研究中,基于地理信息系统(GIS)平台和对象组件,通过建立城市环境空间数据库和污染源监测属性数据库,以及污染源信息管理决策支持系统,实现城市环境污染源空间增减、查询、统计分析的可视化。在分析了城市环境空间数据特点的基础上,提出环境空间信息系统的开发模式,并对应用系统的体系结构和紧密集成模式作了探讨。 相似文献
199.
200.
Dong Hu Jie Zeng Jing Chen Wenfang Lin Xinyan Xiao Mingbao Feng Xin Yu 《环境科学学报(英文版)》2023,35(3):148-159
Urban villages are unique residential neighborhoods in urban areas in China. Roof tanks are their main form of water supply, and water quality deterioration might occur in this system because of poor hygienic conditions and maintenance. In this study, water samples were seasonally collected from an urban village to investigate the influence of roof tanks as an additional water storage device on the variation in the microbial community structure and pathogenic gene markers. Water stagnation in th... 相似文献