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301.
环境医学是环境科学中-门新兴的前沿学科,必将对环境科学的发展产生越来越重要的作用,尤其在环境保护的实际应用中会发挥出更大的作用.本文就环境医学在环境保护中的应用与展望进行了浅析,对其在环境保护管理中的实际应用提出了具体的开展方法与应用展望. 相似文献
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304.
隧洞施工通风系统事故树分析 总被引:4,自引:0,他引:4
在采矿、铁路、公路及水利水电工程中,常常采用长距离隧洞或隧道来穿越高山。而隧洞的施工以其施工技术复杂、难度大、风险高,经常成为控制工程工期的主要环节,隧洞施工中的通风换气系统,关系到施工能否顺利进行和施工作业人员的人身安全,根据隧洞施工通风系统的运行特点,采用安全系统分析中的事故树(FTA)方法,对隧洞施工中通风系统的安全性进行定性分析,找出影响通风安全的主要因素,并提出了通风安全管理对策,可以保证施工作业的顺利进行和人身安全,提高整个施工作业的安全度。 相似文献
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新疆八一钢铁有限责任公司炼铁厂上料系统1^#转运站,1^#a转运站,2^#转运站及1^#、2^#高炉高道料仓在上料时,粉尘污染较为严重,为解决粉尘污染问题,1999年炼铁厂组织设计与施工了40m^2单室卧式3电场除尘器,工程投运后,收尘效果良好,岗位粉尘浓度与外排浓度均低于国家标准。 相似文献
307.
Gholam‐Abbas Barani Mohammad Javad Khanjani 《Journal of the American Water Resources Association》2002,38(4):1053-1060
ABSTRACT: To measure crop evapotranspiration, a large double tank, electronic weighting lysimeter system was designed and installed at the Shahid Bahonar University farm, Kerman, Iran. The system was installed in a 50 m2 underground building. It includes two tanks of 3.00 m in diameter and 1.75 m deep. The weighing mechanism for each tank is a set of three compression strain gage load cells, which are fixed on 1.20 m height column above the floor. According to the specification of the load cells, the maximum possible weighing error may be about 0.01 percent of total mass, which is equivalent to 0.28 mm of water, but the measured error was equal to 1 kg mass, which is equivalent to 0.14 mm of water. The load cell data from each tank and the on‐site environmental data (temperature, humidity, and wind velocity and direction) are automatically recorded and saved in a personal computer hard disk for further use and analysis. 相似文献
308.
S. Mostaghimi T. M. Younos U. S. Tim 《Journal of the American Water Resources Association》1992,28(3):545-552
ABSTRACT: Simulated rainfall was used on experimental field plots to compare the effect of chemical fertilizer and sludge application on sediment, nitrogen, and phosphorus in runoff from no-till and conventional tillage systems. Chemical fertilizer application under the no-till system resulted in the least amount of total N and P in surface runoff. However, sludge application under the no-till system resulted in the least amount of NO3-N and sediment in surface runoff. The worst water quality scenarios were observed when either sludge or chemical fertilizer were surface-applied under a conventional tillage system. Nitrogen losses from the conventional tillage system were minimized when sludge was incorporated into the soil. However, phosphorus and sediment yield from such a system were significantly higher when compared to phosphorus and sediment yield from the no-till system. The results from this study indicate that the use of sludge on agricultural land under a no-till system can be a viable alternative to chemical fertilizer for nitrogen and phosphorus control in runoff. A more cautious approach is recommended when the sludge is incorporated into the soil in a conventional tillage system because of potential for high sediment and phosphorus yield in surface runoff. 相似文献
309.
Rosanna L. Mattingly Edwin E. Herricks Douglas M. Johnston 《Environmental management》1993,17(6):781-795
The environmental impact of loss of natural stream and riparian habitat is of concern throughout the United States and Europe.
Environmental impacts related to such activities as channelization of and levee construction along streams and rivers are
particularly apparent in the Midwestern United States. The objective of the research presented here was to delineate the extent,
relative degree of impact, and implications for management of channelization and levee construction along watercourses located
in the state of Illinois. According to records maintained through the Illinois Streams Information System data base (Illinois
Department of Conservation), nearly 25% of surface water resources in the state have been modified directly by channelization
and/or levee construction. Reviews of agency records, elaboration of case histories, interviews with agency personnel, and
inspections of impacted sites indicated that these alterations have occurred without the benefit of effective mitigation.
Although permit records may provide suggestions for mitigation to be incorporated in the design of a particular project, permits
issued generally do not require even minimal instream habitat and bank stabilization efforts in conjunction with channel alteration.
Information derived from policy and case study analyses suggests that institutional constraints, rather than lack of particular
understanding about mitigation, provide major barriers to protecting the state's surface water resources in terms of regulatory
review, policy interpretation and implementation, and project evaluation. Recommendations for environmental management efforts
regarding these and similar channel alterations are elaborated from these findings. 相似文献
310.
解读《建设项目环境保护管理条例》修订的要点,剖析当前石油化工建设项目环境保护管理体系的核心由“环评制度”逐步向“排污许可证制度”转变的现实情况,及与此相应的环保行政主管部门对建设单位和设计咨询单位的环保工作提出的新要求。从实际工作出发,总结了中国石化系统和民营企业石油化工建设项目在新形势下环保管理工作的特点、遇到的问题及解决方案。 相似文献