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干旱对电力生产的影响 总被引:2,自引:0,他引:2
本文以1994年~1995年干旱对陕西省电力生产的影响为例,论述了干旱对电力生产的影响,在此基础上提出了相应的减灾对策. 相似文献
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Environmental Chemistry Letters - Wastewater from the livestock industries contains high concentration of nutrients, organic pollutants, suspended solids, and pathogenic microorganisms. Discharge... 相似文献
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针对攀枝花西渣场采用灌浆胶结炉渣加固边坡工程,开展了灌浆胶结炉渣单轴压缩试验和三轴压缩试验,研究了胶结炉渣体的破坏模式、强度特征及其对边坡稳定性的影响。试验结果表明:随着灌浆胶结炉渣中炉渣含量的增加,其内部结构不均匀性更加突出,试验加载过程中压应力区和拉应力区相互交错分布,最终破坏时受劈裂破坏和剪切破坏共同作用,其破坏形式从张拉劈裂破坏的一条曲折延伸的裂纹逐渐转变为多条裂纹的剪切-张拉复合破坏模式;注入灌浆材料能够提高现场炉渣体的黏聚力,从而提高胶法炉渣的强度。根据试验结果确定了胶结炉渣的强度参数,并进行边坡稳定性分析,结果表明注入灌浆形成胶结炉渣提高了炉渣边坡稳定性安全系数,边坡治理方案效果很好。 相似文献
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Heavy metals of the Tibetan top soils 总被引:1,自引:0,他引:1
Sheng J Wang X Gong P Tian L Yao T 《Environmental science and pollution research international》2012,19(8):3362-3370
Objective
Due to its high elevation, rare human activities and proximity to south Asia where industries are highly developed, it is required to investigate the fragile environment of the Tibetan Plateau. We are aiming to obtain the concentration level, source, spatial distribution, temporal variation and potential environmental risk of Tibetan soils.Methods
A total of 128 surf ace soil samples were collected and analyzed f or V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd and Pb, and an additional 111 samples were analyzed f or Hg and total organic carbon. Concentration comparisons coupled with multivariate statistics were used to analysis the sources of elements of soils. We also carried out Risk assessment on the soils.Results
Concentrations of Hg, Cr, Ni, Cd and Pb are slightly higher than those of the late 1970s. Concentrations of Cr and Ni are higher than averaged world background values. Tibetan soils present a high natural As concentration level.Discussion
Anthropogenic sources may partly contribute to the elevated Hg, Cd and Pb concentrations. Cr and Ni are mainly originated from soil parent materials. Soil elements in Anduo and Qamdo regions may threaten the health of local people.Conclusion
Heavy metal elements of Tibetan Plateau are mainly from the natural source. Arsenic present a high background level. Soil elements in Anduo and Qamdo regions may threaten the health of local people, which should be of concern to scientists and the government. 相似文献
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