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91.
核医学放射性"三废"的排放对周围环境产生的辐射影响,通过采取控制排放节点、放置衰变、监测总放水平等防护措施,确保废物达标进入环境,保持环境良好。 相似文献
92.
93.
Watson A Glaspell B Christensen N Lachapelle P Sahanatien V Gertsch F 《Environmental management》2007,40(6):880-888
Many public land management agencies are committed to understanding and protecting recreation visitor experiences. Parks Canada
is deeply committed to that objective for visitors to Canada’s National Parks. This 2004 study, informed by a 2003 qualitative
study of visitor experiences and influences on those experiences at Auyuittuq National Park in Nunavut, worked to bring 50
potential elements of visitor experiences down to five articulated dimensions of the experience that is currently being received
at this remote eastern arctic park. A hypothesized set of 17 influences on experiences, also reduced to just two factors with
similar response patterns, and with some items that did not flow into the two factors, were used in a regression analysis
to understand the relationship between experiences and factors of influence. A sample of 61.8% (84) of the total recreation
visitor population 16 years of age or older was surveyed during deregistration after the trip. Knowledge about the dimensions
of the experiences currently received and factors of influence on those experiences can be used to guide selection of indicators
for describing objectives and prescribing monitoring protocol. 相似文献
94.
I. A. Akpabio E. A. Eniang E. C. Egwali 《Environment, Development and Sustainability》2008,10(3):249-265
This study examines the present environmental and socio-economic status of Adiabo Community in Odukpani Local Government Area
of Cross River State against the background of the proposal of the Cross River State Government to site a tourism resort in
the community. The paper utilizes participatory appraisal techniques to document information on the existing environmental
and socio- economic structure of the study area. It also analyses the potential effect of the proposed tourist resort on the
community dwellers and finally recommends strategies to ensure the sustainability of the proposed project and livelihood activities
of the natives in the study area. 相似文献
95.
气候异常对交通影响的诊断分析 总被引:4,自引:0,他引:4
通过交通与气候关系的诊断分析,从宏观角度提出了气候对交通运输直接影响和间接影响的两种途径,并给出了两种影响的概念模型。 相似文献
96.
This study was initiated to develop cause and effect relationships between Army training activities and bird populations throughout the continental United States. Installations in Kentucky, Louisiana, Texas, and Washington were selected as representative of diverse ecosystems and of extent of training. Birds were separated into 31 guilds to assist in the analysis between different ecosystems. The results showed that (1) guild theory can be useful in impact analyses within and between ecosystems, (2) tracked vehicles disturb bird populations because of habitat alteration and reduction, (3) the change in biomass ranged from 20.9to–55.3 percent and is dependent on the extent of training and ecosystem type, and (4) species replacement should be a major concern, with nine endemic species being replaced by three endemic and two introduced species. Because of similarities between tracked vehicle training and some construction activities, much of this information may be useful for analysis of civilian activities as well as military. 相似文献
97.
降水异常对三峡工程建设的影响 总被引:2,自引:0,他引:2
利用三峡库区17个站1997年的逐日降水资料,分析了三峡库区1997年的降水特点.结果表明,异常偏少的降水为大江截流成功提供了有利的天气气候条件;同时,从气候学角度指出,大江截流以后的施工期间仍面临着严峻的气候异常风险,应引起有关部门特别注意. 相似文献
98.
从慧木碰撞事件出发,根据小天体与地球相撞的史实,分析了小天体撞击地球的可能性及其效应,探讨了地球免遭个天体碰撞的可能对策。 相似文献
99.
100.
通用土壤流失方程式是世界上应用最广泛的估测土壤侵蚀量的公式,在我国建设项目水土流失的环境影响评价中也有重要的应用价值。本文根据方程式各因子的物理意义和工程施工的特点,具体说明了各因子在环境评价中的取值方法及方程式的应用范围。 相似文献