首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   665篇
  免费   68篇
  国内免费   27篇
安全科学   122篇
废物处理   8篇
环保管理   215篇
综合类   245篇
基础理论   39篇
污染及防治   28篇
评价与监测   37篇
社会与环境   42篇
灾害及防治   24篇
  2024年   1篇
  2023年   7篇
  2022年   24篇
  2021年   21篇
  2020年   20篇
  2019年   18篇
  2018年   13篇
  2017年   17篇
  2016年   17篇
  2015年   17篇
  2014年   13篇
  2013年   29篇
  2012年   39篇
  2011年   37篇
  2010年   41篇
  2009年   41篇
  2008年   24篇
  2007年   52篇
  2006年   33篇
  2005年   36篇
  2004年   25篇
  2003年   31篇
  2002年   16篇
  2001年   32篇
  2000年   27篇
  1999年   21篇
  1998年   13篇
  1997年   13篇
  1996年   8篇
  1995年   20篇
  1994年   16篇
  1993年   3篇
  1992年   6篇
  1991年   2篇
  1990年   1篇
  1989年   4篇
  1988年   2篇
  1987年   1篇
  1986年   1篇
  1983年   1篇
  1982年   1篇
  1981年   3篇
  1980年   2篇
  1979年   2篇
  1978年   3篇
  1976年   1篇
  1973年   3篇
  1972年   1篇
  1971年   1篇
排序方式: 共有760条查询结果,搜索用时 609 毫秒
191.
依法科学管理处置医疗废物   总被引:3,自引:0,他引:3  
针对我国医疗废物管理和处置现状,提出完善有关医疗废物管理和处置的法律体系等七项措施。  相似文献   
192.
ABSTRACT: The American Society of Civil Engineers (ASCE) Model State Water Code provides suggested statutory language and commentary helpful in guiding western water law reform. Departing from the past preference for stream diversions and consumptive uses, the code is sensitive to the public's interest in maintaining environmental quality. The traditional doctrine protected inefficient uses and in some states hampered transfers. The model code addresses these issues as well as advocating integrated manage. meat and water resource planning. The debate on how to reform water law has already started, and the model code provides material useful in the reform process. Even with the current draft code, a few gaps exist for later resolution.  相似文献   
193.
ABSTRACT: Transboundary water conflicts occur under four circumstances. Because water is mobile, more than one political unit or owner has power to use water as it sequentially moves through the hydrologic cycle. Even when water doesn't move, jurisdictional conflicts occur because multiple political units regulate water simultaneously. When a river is a boundar uncertainty of ownership or jurisdiction occurs as the river shifts its course through natural processes. Lastly, limitations on who may use water may be imposed by export bans or more indirect measures like taxation. Legal solutions to transboundary conflicts are limited to litigation, legislation, and negotiated agreements. This paper examines the judicial solution.  相似文献   
194.
译文叙述了地面和地下储油罐对环境影响的差异、美国环保局(EPA)对此的有关规定、石油污染法、全国污染物排除控制系统(NPDES)等。最后介绍地面油罐法规具体内容。  相似文献   
195.
ABSTRACT: Whomever would affect water policy development must influence the water legislative process. This paper discusses in the context of the Model State Water Allocation Code the following ten ideas about doing that: (1) seek the right timing for enactment; (2) set modest goals; (3) prepare a well-drafted proposal; (4) recognize diversity by offering legislative choices; (5) consider the impacts of adoption; (6) make alliances; (7) respect executive influence; (8) become involved in legislative interaction; (9) be flexible; and (10) persist. Heeding these ideas, although not guaranteeing enactment, is sure to be educational for participants and useful to legislators.  相似文献   
196.
应用事故致因理论,探讨机车车辆伤害事故的本质,研究机车车辆伤害事故的发生规律及成因模型,提出预防机车车辆伤害事故的对策。  相似文献   
197.
ABSTRACT: Since Saskatchewan assumed the responsibility for managing the Province's water resources in 1930, the importance of the Province's water resources has been recognized by assigning the responsibility for managing the resource to higher levels in the government structure. With such recognition, there tended to be an overlapping of responsibilities that resulted in undefined areas of jurisdiction and duplication of services. Also, there was no opportunity for direct public participation in the management structure. These deficiencies were recognized, and following a series of public hearings a “Cabinet Committee on Water Concerns” in 1983 concluded that the most appropriate government structure for managing the water resources of Saskatchewan would be a Crown corporation. As a result, in 1984 the Saskatchewan Water Corporation was formed and given the responsibility to manage, administer, develop, control, and protect the water and related land resources in Saskatchewan. An important aspect of this responsibility was that the corporation should initiate a process of public involvement. Thus, six “Regional Watershed Advisory Boards” were established. The Advisory Boards provide the Corporation with a linkage to the general public by providing advice, participating in policy revision and development, and assisting Corporation staff in other related water management activities.  相似文献   
198.
ABSTRACT: The evolution of ground-water law in eight states in the Midwest (Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio, and Wisconsin) is examined, and a review of transitions in ground-water doctrines is presented. Two underlying themes in changing ground-water management are communicated. First, ground-water law is evolving from private property rules of capture based on the absolute ownership doctrines to rules requiring conservation and sharing of ground water as a public resource. Second, in both courts and state legislatures, a proactive role of ground-water management is emerging, again, with an emphasis on sharing. Both of these trends are apparent in the Midwest. In the last decade midwestern states have (1) seen significant shifts in court decisions on ground-water use with greater recognition of the reciprocal or mutually dependent nature of ground-water rights, and (2) seen increased legislative development of comprehensive ground-water management statutes that emphasize the reciprocal liabilities of ground-water use. These trends are examined and ground-water management programs discussed for eight states in the Midwest.  相似文献   
199.
城市街道地表物特性分析   总被引:34,自引:0,他引:34  
通过对城市街道地表物的收集、处理、分析和典型降水的径流冲刷实测,全面探究了城市街道地表物的分布、累积和冲刷规律,并对其污染物的含量和污染物总量进行了定量计算。为现代城市非点源污染截污处理和环境综合整治提供了理论和实践依据。  相似文献   
200.
概述了目前县(市)环保执法中存在的问题,提出了加强县(市)环保执法的对策。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号