全文获取类型
收费全文 | 1548篇 |
免费 | 22篇 |
国内免费 | 16篇 |
专业分类
安全科学 | 76篇 |
废物处理 | 88篇 |
环保管理 | 340篇 |
综合类 | 184篇 |
基础理论 | 300篇 |
环境理论 | 2篇 |
污染及防治 | 384篇 |
评价与监测 | 136篇 |
社会与环境 | 57篇 |
灾害及防治 | 19篇 |
出版年
2023年 | 12篇 |
2022年 | 12篇 |
2021年 | 15篇 |
2020年 | 23篇 |
2019年 | 24篇 |
2018年 | 34篇 |
2017年 | 25篇 |
2016年 | 41篇 |
2015年 | 32篇 |
2014年 | 38篇 |
2013年 | 159篇 |
2012年 | 57篇 |
2011年 | 77篇 |
2010年 | 69篇 |
2009年 | 78篇 |
2008年 | 79篇 |
2007年 | 82篇 |
2006年 | 86篇 |
2005年 | 60篇 |
2004年 | 46篇 |
2003年 | 58篇 |
2002年 | 54篇 |
2001年 | 24篇 |
2000年 | 20篇 |
1999年 | 26篇 |
1998年 | 25篇 |
1997年 | 13篇 |
1996年 | 14篇 |
1995年 | 28篇 |
1994年 | 14篇 |
1993年 | 14篇 |
1992年 | 15篇 |
1991年 | 13篇 |
1990年 | 19篇 |
1989年 | 15篇 |
1988年 | 9篇 |
1987年 | 8篇 |
1986年 | 8篇 |
1985年 | 15篇 |
1984年 | 14篇 |
1983年 | 16篇 |
1982年 | 20篇 |
1981年 | 26篇 |
1980年 | 11篇 |
1979年 | 13篇 |
1975年 | 5篇 |
1974年 | 4篇 |
1973年 | 9篇 |
1972年 | 5篇 |
1971年 | 5篇 |
排序方式: 共有1586条查询结果,搜索用时 15 毫秒
151.
Michael Donovan Charles A. Job William C. Sonzogni 《Journal of the American Water Resources Association》1981,17(1):23-28
ABSTRACT: The Illinois v. Milwaukee Federal District Court decision is the most far reaching application yet of the federal common law of nuisance to interstate water pollution conflicts. Although a Federal Appelate Court recently rescinded part of the district court decision, Milwaukee must still upgrade its metropolitan sewage system to a level beyond that required by federal and state regulations. The improvements must be completed with or without federal aid. The case points out the apparent inability of the Clean Water Act, the most comprehensive federal legislation affecting the nation's water quality, to deal with certain interstate water quality conflicts. The Milwaukee decision could set a precedent for similar settlements elsewhere which may in turn affect the U.S. Environmental Protection Agency's water quality clean up program. A more integrated, ecosystem conscious approach to management of shared water resources (e.g., the Great Lakes) would help reduce the need for court decisions like Illinois v. Milwaukee. 相似文献
152.
Daniel A. Cincotta Jay R. Stauffer Charles H. Hocutt 《Journal of the American Water Resources Association》1982,18(3):437-450
ABSTRACT: The applicability of the U.S Environmental Protection Agency's (USEPA) water temperature criteria in evaluating the impact of a thermal discharge from the P. H. Glatfelter Paper Company, Spring Grove, Pennsylvania, is analyzed. A review of the literature relative to 11 temperature Criteria was conducted for six fish species designated by the USEPA as “representative important species” (RIS) of the West Branch Codorus Creek, Susquehanna River drainage. The species were: Notemigonus crysolcucas (golden shiner), Notropis analostanus (satinfin shiner), Rhinichthys atratulus (blacknose dace), Catostomus comme-soni (white sucker), Lepomis gibbosus (pumpkinseed). and Micropterous salmoides (largemouth bass). It was found that by applying only USEPA suggested criteria that a complete evaluation was not satisfactory. Temperature behavior data, specifically preference and avoidance information, coupled with field sampliug was needed to properly assess the effects of the thermal effluent. The final analysis indicated that the thermal discharge of the paper company should have minimal effect on the fish community of Codorus Creek. 相似文献
153.
154.
Sally Ann Sims Jennifer R. Seavey Charles G. Curtin 《Journal of Coastal Conservation》2013,17(3):339-350
Accelerated sea level rise (slr) is expected to transform vulnerable Atlantic coastal habitats in the United States during this century. Low-elevation sandy beaches, important nesting habitat for the continued recovery of the federally threatened piping plover (Charadrius melodus) in Rhode Island, are especially vulnerable. These beaches, under a mix of private and public ownership, exist in a heterogeneous landscape of dunes, rocky headlands, salt ponds, and heavily developed areas. Understanding the extent to which piping plover nesting beaches can retreat landward under projected slr is important for prioritizing future conservation actions across multiple jurisdictions. This research examines habitat change in response to slr (0.5, 1.0, and 1.5 m) under stationary and migration beach responses and whether development blocks habitat migration for five productive piping plover nesting beaches. We found that under the stationary habitat model, all beaches lose area under all slr scenarios. For the habitat migration model, future habitat availability differs by beach depending on elevation, landward topography, and presence of development. However, across the majority of beach area, piping plover habitat will be able to migrate landward if unconstrained by future development. A coalition of public and private stakeholders already supports management efforts to help ensure plover population recovery in the area. With emerging habitat change prediction tools, these stakeholders and other partners can engage in innovative, local-level planning needed to protect wildlife habitat and commercial, residential, and infrastructure assets from sea level rise. 相似文献
155.
156.
Walter Q. Betancourt Sherif Abd-Elmaksoud Charles P. Gerba 《Food and environmental virology》2018,10(2):209-211
This study examined the efficacy of reovirus concentration from large volumes of water using two positively charged filters: Zeta Plus 1MDS and NanoCeram. The results indicated that an average of 61 and 81% of input reoviruses were effectively recovered, respectively, from recycled water and tap water using NanoCeram filtration. 相似文献
157.
158.
Vincent Careau Jean-François Giroux Dominique Berteaux 《Behavioral ecology and sociobiology》2007,62(1):87-96
Food-hoarding animals are expected to preferentially cache items with lower perishability and/or higher consumption time.
We observed arctic foxes (Alopex lagopus) foraging in a greater snow goose (Anser caerulescens atlanticus) colony where the main prey of foxes consisted of goose eggs, goslings, and lemmings (Lemmus and Dicrostonyx spp.). We recorded the number of prey consumed and cached and the time that foxes invested in these activities. Foxes took
more time to consume a goose egg than a lemming or gosling but cached a greater proportion of eggs than the other prey type.
This may be caused by the eggshell, which presumably decreases the perishability and/or pilfering risk of cached eggs, but
also increases egg consumption time. Arctic foxes usually recached goose eggs but rarely recached goslings or lemmings. We
tested whether the rapid-sequestering hypothesis could explain this recaching behavior. According to this hypothesis, arctic
foxes may adopt a two-stage strategy allowing both to maximize egg acquisition rate in an undefended nest and subsequently
secure eggs in potentially safer sites. Foxes spent more time carrying an egg and traveled greater distances when establishing
a secondary than a primary cache. To gain further information on the location and subsequent fate of cached eggs, we used
dummy eggs containing radio transmitters. Lifespan of primary caches increased with distance from the goose nest. Secondary
caches were generally located farther from the nest and had a longer lifespan than primary caches. Behavioral observations
and the radio-tagged egg technique both gave results supporting the rapid-sequestering hypothesis. 相似文献
159.
160.
Sung Kim Chen Zhao Allan T. Bombard Charles Cantor Dirk van den Boom Cosmin Deciu 《黑龙江环境通报》2013,33(13):1310-1313