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排序方式: 共有1301条查询结果,搜索用时 15 毫秒
881.
Thenearsurfacedisposalisthemainlydisposalmethodforlowintermediatelevelradioactivesolidwaste(LILW)inmanycountries.Usually,thedisposalwayinthedisposalunitistheconcretesolidificationisputandpiledinarray,andthebackfillandbuffermaterialisfilledbetweentheses… 相似文献
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Krol Maarten Alcamo Joseph Leemans Rik 《Mitigation and Adaptation Strategies for Global Change》1997,1(4):341-361
Among the key issues of concern to the Climate Convention is the stabilization of greenhouse gas concentrations and the minimization
of impacts to global agriculture, natural ecosystems and economic development. The purpose of this paper is to couple these
issues in consistent, integrated scenarios, using the IMAGE 2.0 model as an integrating tool. Scenarios of gradual stabilization
of atmospheric CO2 at 350 and 450 ppm are compared to a baseline of no policy action in which CO2 concentration increases to 777 ppm. Under the stabilizaton scenarios substantially smaller areas of wheat and millet, as
well as nature reserves, are threatened by climate change, especially in temperate regions. The amount of sea level rise is
also reduced under the stabilization scenarios. However, climate continues to change under the stabilization scenarios and
therefore some ‘residual’ climate impacts occur. Hence the integrated scenarios indicate that stabilizing greenhouse gas concentrations
at or slightly above current levels will lessen impacts as compared to baseline levels, but not eliminate them.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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Awni T. Batayneh Hani A. Qassas 《环境科学学报(英文版)》2006,18(2):263-269
The demand for water resources in the area south of the Dead Sea due to continued development, especially at the Arab Potash Company (APC) for production and domestic purposes necessitates that water quality in the area be monitored and evaluated based on the local geology and hydrogeology. The objective of this paper is to monitor seasonal fluctuations of groundwater and to determine how fluctuation in the water levels will affect the groundwater quality. Groundwater levels were found to be influenced by rainfall and pumping of water from the wells for domestic and industrial use. Twenty water samples were collected from different wells and analyzed for major chemical constituents both in pre- and post-seasons to determine the quality variation. Chemical constituents are significantly increased after post-season recharge. According to the overall assessment of the area, water quality was found to be useful for drinking, irrigation and industry. 相似文献
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Wang Ying yan Wang Jin guang Ma Yu qin Su Zhen Zhao Kai jian Zhang Zhong lun Zheng Yan zhen Liu Cheng xian 《环境科学学报(英文版)》1998,10(1):43-48
KineticsoflowlevelchemiluminescencefromplantleafsmokedbyairpolutantsWangYingyan,WangJinguangBeijingMunicipalResearchInstitu... 相似文献
889.
本篇文章主要通过对南昌台地下水位资料变化的处理分析,利用求地下水水位变化的加速度来判别和分析地震异常,并初步进行试验预报和探索研究。 相似文献
890.
调查了1989-1991年不海市各类水体中人工放射性核素的水平。调查共设点15个,采集枯、丰水期水样45个,结果表明,上海市各类水体中^90Sr、^137Cs和总β放射性浓度均低于国家生活饮用水卫生限制标准,属正常本底水平。按调查结果估算的上海市居民从饮水中摄入的人工放射性核素^90Sr、^137Cs、^3H,所致人均年有效剂量为3.8×10^-7SV,与全国均值相吻合。 相似文献