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我国是一个地震多发、震灾严重的国家。防御与切实减轻地震灾害是我国一项长期而艰巨的任务。江泽民同志多次指出 ,要切实做好防震减灾工作 ,坚持经济建设同减灾一起抓。党和政府历来高度重视防震减灾工作 ,《防震减灾法》的颁布进一步规范了防震减灾工作的三大工作体系。并在震灾预防这一工作体系中明确提出 :“新建、扩建、改建建设工程 ,必须达到抗震设防要求。”“重大建设工程和可能发生严重次生灾害的建设工程 ,必须进行地震安全性评价 ;并根据地震安全性评价结果 ,确定抗震设防要求 ,进行抗震设防。”实践证明 ,依法加强建设工程抗震… 相似文献
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建设工程必须进行抗震设防 总被引：2，自引：0，他引：2
分析了张家口市辖区和临近地区的地质构造、地震活动特点以及地震所造成的危害；论述了对建设工程进行抗震设防和地震安全性评价的重要性和必要性；阐明了将建设工程抗震设防要求和地震安全性评价管理纳入基本建设管理程序的时代性和紧迫性。 相似文献
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随着我国防震减灾法律法规的逐步健全和政府对加强公共安全的进一步重视，也给区（县）地震部门依法进行工程设防管理和地震安全性评价工作带来了新的挑战和机遇。重庆市巴南区地震局于2002年经区政府批准进入区行政审批中心，依法履行对建设工程进行抗震设防要求审批的职能，同时将地震行政审批纳入了全区建设领域基本建设管理程序中。 相似文献
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工程场地地震安全性评价工作中两个问题的讨论 总被引：1，自引：0，他引：1
我国地震活动频度高、强度大、分布广。地震引起的建、构筑物和工程设施倒塌破坏是导致人员伤亡和经济损失的主要原因。随着我国经济快速发展,城市化进程加快,核电站、大型水电站等重大基础设施越来越多。为了最大限度地减轻地震灾害造成的损失,《中华人民共和国防震减灾法》明确规定,一般建设工程必须按照国家颁布的地震烈度区划图或者地震动参数区划图规定的抗震设防要求,进行抗震设防;新建、扩建、改建建设工程,必须达到抗震设防要求”。地震区划与地震安全性评价等工作是确定抗震设防要求的重要科学依据。承蒙工程地震界专家、学者的鼎… 相似文献
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介绍了合肥市长丰县科技局(地震工作办公室)在加强建设工程抗震设防要求管理过程中,如何拓展服务领域,推进震害预测工作的主要措施和做法,对市县地震主管部门加强一般建设工程抗震设防要求监管的途径进行了探讨. 相似文献
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新北油田位于渤海东北部海域内,工程场地跨度较大,沉积物为黄河冲洪积相、陆海交互相和海相不同沉积类型.本文依托新北油田海上平台工程地震安全性评价项目,对该区域钻孔土样进行了动三轴试验研究工作.该试验研究有利于加深对不同土质动力学性能的认识,可为该工程附近海域内其它海洋建设工程工作提供借鉴和参考. 相似文献
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20 0 3年 7月 3日新疆维吾尔自治区第十届人民政府第三次常务会议召开。会议讨论并通过了《新疆维吾尔自治区实施〈地震安全性评价管理条例〉若干规定》(以下简称《规定》)。 7月1 6日《规定》经自治区主席司马义铁力瓦尔地签署发布 ,并于 9月 1日正式实行。《规定》是依据《地震安全性评价管理条例》并紧密结合新疆维吾尔自治区实际情况制定的 ,其内容共 1 4条。它进一步明确了新疆维吾尔自治区行政区域内必须进行地震安全性评价的建设工程的范围 ,在《地震安全性评价管理条例》规定必须进行地震安全性评价的建设工程范围内 ,针对我区在全… 相似文献
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Gtz Schroth Luciana Ferreira Da Silva Marc‐Andree Wolf Wenceslau Geraldes Teixeira Wolfgang Zech 《水文研究》1999,13(10):1423-1436
The partitioning of rain water into throughfall, stemflow and interception loss when passing through plant canopies depends on properties of the respective plant species, such as leaf area and branch angles. In heterogeneous vegetation, such as tropical forest or polycultural systems, the presence of different plant species may consequently result in a mosaic of situations with respect to quantity and quality of water inputs into the soil. As these processes influence not only the water availability for the plants, but also water infiltration and nutrient leaching, the understanding of plant effects on the repartitioning of rain water may help in the optimization of land use systems and management practices. We measured throughfall and stemflow in a perennial polyculture (multi‐strata agroforestry), monocultures of peach palm (Bactris gasipaes) for fruit and for palmito, a monoculture of cupuaçu (Theobroma grandiflorum), spontaneous fallow and primary forest during one year in central Amazonia, Brazil. The effect on rain water partitioning was measured separately for four useful tree species in the polyculture and for two tree species in the primary forest. Throughfall at two stem distances, and stemflow, differed significantly between tree species, resulting in pronounced spatial patterns of water input into the soil in the polyculture system. For two tree species, peach palm for fruit (Bactris gasipaes) and Brazil nut trees (Bertholletia excelsa), the water input into the soil near the stem was significantly higher than the open‐area rainfall. This could lead to increased nutrient leaching when fertilizer is applied close to the stem of these trees. In the primary forest, such spatial patterns could also be detected, with significantly higher water input near a palm (Oenocarpus bacaba) than near a dicotyledonous tree species (Eschweilera sp.). Interception losses were 6·4% in the polyculture, 13·9 and 12·3% in the peach palm monocultures for fruit and for palmito, respectively, 0·5% in the cupuaçu monoculture and 3·1% in the fallow. With more than 20% of the open‐area rainfall, the highest stemflow contributions to the water input into the soil were measured in the palm monocultures and in the fallow. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
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M. N. French R. L. Bras W. F. Krajewski 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(1):27-45
A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities. 相似文献
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M. A. Kahn 《洁净——土壤、空气、水》2000,28(2):95-101
Red tide, a recurrent phenomenon has become conspicuous in several Kashmir lake ecosystems since 1991. The responsible organism (Euglena pedunculata), a rare flagellate rediscovered in the Kashmir Himalaya (Khan 1993) caused first and unprecedented red tide outbreak, constituting a maximum of 96% of resident numerical phytoplankton density in Dal Lake. At present, conflicting hypotheses exist on the generation of causal assemblage(s) imparting redness to waters: Jeeji Bai (1991) linked its origin to acid precipitation – a fallout of burning oil‐fields during the Gulf War – whilst Khan (1993) holds local factor(s) responsible. Field/experimental studies support the latter contention that the influx of untreated sewage, in unison with warm temperatures, high levels of PhAR, iron and interruption to hydrological flow‐pattern together with absence/or reduction in grazing activity created conducive environmental milieu for red tide outbreak. Dal Lake “red tide” drifted the bloom‐inoculum to other waters, including Lake Wular, where additional ecological niches were carved out, threatening the aesthetic value and biological diversity of Kashmir lakes. Ecological monitoring indicates frequent seasonal red tide occurrence in Dal Lake (including summer‐autumn event of 1998) which testifies its unabated eutrophication status. Further studies are needed on ecological adaptability and biogeographic distribution of this rare and unique red tide‐causing flagellate. 相似文献
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