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Development and prospect of mobile gravity monitoring and earthquake forecasting in recent ten years in China
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作者 Yiqing Zhu Fang Liu +1 位作者 Guoqing Zhang Yunma Xu 《大地测量与地球动力学:英文版》 2019年第6期485-491,共7页
After the Wenchuan earthquake in 2008,China Earthquake Administration has strengthened the monitoring of mobile gravity and earthquake forecasting.This paper mainly analyzes the development of mobile gravity monitorin... After the Wenchuan earthquake in 2008,China Earthquake Administration has strengthened the monitoring of mobile gravity and earthquake forecasting.This paper mainly analyzes the development of mobile gravity monitoring network of China in 2008,the role of time-varying gravity field in the determination of strong earthquake risk and the technical problems that gravity monitoring still needs to be solved.By analysing the mobile gravity monitoring and earthquake prediction in China,the characteristics of gravity anomaly and three elements of earthquake prediction are discussed.The mobile gravity observation data can better reflect the gravity anomalies before the earthquake,especially the strong earthquakes greater than Ms6.0.Finally,we put forward the reconsideration of the development strategy of mobile gravity monitoring and earthquake forecasting in China. 展开更多
关键词 MOBILE GRAVITY MONITORING WENCHUAN EARTHQUAKE Lushan EARTHQUAKE EARTHQUAKE prediction
Quantitative assessment of the impact of earthquakeinduced geohazards on natural landscapes in Jiuzhaigou Valley
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作者 HU Xu-dong HU Kai-heng +2 位作者 ZHANG Xiao-peng WEI Li TANG Jin-bo 《山地科学学报:英文版》 SCIE CSCD 2019年第2期441-452,共12页
Many natural landscapes that lie in high mountain regions are highly susceptible to geological hazards, and their values and integrity are strongly threatened by the hazards. A preliminary framework was proposed to un... Many natural landscapes that lie in high mountain regions are highly susceptible to geological hazards, and their values and integrity are strongly threatened by the hazards. A preliminary framework was proposed to undertake a quantitative assessment of the impact of earthquake-induced geological hazards on the natural landscapes. Four factors reflecting the aesthetic value, ecological value, integrity of landscapes were selected to assess their vulnerability. The impact of earthquake-induced geological hazards on the landscapes is quantitatively expressed as the product of their vulnerability and resilience. The assessment framework was applied to Jiuzhaigou Valley which was severely struck by the Ms 7.0 earthquake on August 8, 2017. Field survey, satellite image interpretation, high-resolution DEM and unmanned aerial vehicle(UAV) reconnaissance were used to retrieve the values of the assessment factors. Twenty seven World Heritage Sites in the valley strongly influenced by the earthquakeinduced geohazards were evaluated. The impact values of two sites of them(Sparking Lake and Nuorilang Waterfall) are up to 8.24 and 4.65, respectively, and their natural landscapes were greatly damaged. The assessment results show a good agreement with the actual damages of the heritage sites. 展开更多
关键词 NATURAL landscapes assessment Jiuzhaigou EARTHQUAKE Earthquake-induced GEOHAZARDS World HERITAGE SITES
Possible link between long-term and short-term water injections and earthquakes in salt mine and shale gas site in Changning,south Sichuan Basin,China 预览
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作者 XingLin Lei ZhiWei Wang JinRong Su 《地球与行星物理:英文版》 CSCD 2019年第6期510-525,共16页
Late at night on 17 June 2019,a magnitude 6.0 earthquake struck Shuanghe Town and its surrounding area in Changning County,Sichuan,China,becoming the largest earthquake recorded within the southern Sichuan Basin.A ser... Late at night on 17 June 2019,a magnitude 6.0 earthquake struck Shuanghe Town and its surrounding area in Changning County,Sichuan,China,becoming the largest earthquake recorded within the southern Sichuan Basin.A series of earthquakes with magnitudes up to 5.6 occurred during a short period after the mainshock,and we thus refer to these earthquakes as the Changning M6 earthquake sequence(or swarm).The mainshock was located very close to a salt mine,into which for~3 decades fresh water had been extensively injected through several wells at a depth of 2.7–3 km.It was also near(within~15 km)the epicenter of the 18 December 2018 M5.7 Xingwen earthquake,which is thought to have been induced by shale gas hydraulic fracturing(HF),prompting questions about the possible involvement of industrial activities in the M6 sequence.Following previous studies,this paper focuses on the relationship between injection and seismicity in the Shuanghe salt field and its adjacent Shangluo shale gas block.Except for a period of serious water loss after the start of cross-well injection in 2005–2006,the frequency of earthquakes shows a slightly increasing tendency.Overall,there is a good correlation between the event rate in the Shuanghe area and the loss of injected water.More than 400 M≥3 earthquakes,including 40 M≥4 and 5 M≥5 events,had been observed by the end of August 2019.Meanwhile,in the Shangluo area,seismicity has increased during drilling and HF operations(mostly in vertical wells)since about 2009,and dramatically since the end of 2014,coincident with the start of systematic HF in the area.The event rate shows a progressively increasing background with some fluctuations,paralleling the increase in HF operations.More than 700 M≥3 earthquakes,including 10 M≥4 and 3 M≥5 in spatially and temporally clustered seismic events,are correlated closely with active fracturing platforms.Well-resolved centroid moment tensor results for M≥4 earthquakes were shown to occur at very shallow depths around shale formations with 展开更多
关键词 Changning earthquake injection-induced earthquake deep well injection hydraulic fracturing salt well mine shale gas
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Earthquake hazard on Iraqi soil: Halabjah earthquake as a case study
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作者 Abbas J.Al-Taie Bushra S.Albusoda 《大地测量与地球动力学:英文版》 2019年第3期196-204,共9页
Iraq is not secure from seismic hazards. Earthquakes are likely to happen and may cause substantial damage. Actually, such hazards were happened and recorded after the last earthquake in November 2017(Halabjah earthqu... Iraq is not secure from seismic hazards. Earthquakes are likely to happen and may cause substantial damage. Actually, such hazards were happened and recorded after the last earthquake in November 2017(Halabjah earthquake). Unfortunately, there is a lack of studies concerns the assessment of the earthquake hazard on the soil in Iraq. The available research efforts directed toward the earthquakes and their effects on bridge piers, and traditional commercial buildings of Iraq. A historical view of earthquakes that struck Iraq was presented in this paper. Evaluation of liquefaction susceptibility of poorly graded sand at the southwest of Baghdad, Iraq was studied considering the last earthquake. The NCEER, 1997 workshop procedure using shear wave velocity was used to evaluate liquefaction susceptibility of soil. The variation of safety factor with depth had been investigated at different earthquake magnitudes and accelerations.The study revealed that the soil had a high tendency to liquefaction if subjected to earthquake magnitudes within the ranges that hit Iraq in November 2017. Large attention should be given to the effect of the earthquake on soil foundation in the future for all engineering project that constructed in Iraq. 展开更多
关键词 EARTHQUAKE Halabjah EARTHQUAKE LIQUEFACTION SHEAR wave VELOCITY SAND
Using Airgun Source Signals to Study Regional Wave Velocity Changes before and after the Yunlong MS5.0 and Yangbi MS5.1 Earthquakes 预览
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作者 YANG Jianwen LI Lei +4 位作者 ZHANG Pengying YE Beng HE Yingwen CHEN Jia CHA Wenjian 《中国地震研究:英文版》 CSCD 2019年第2期320-335,共16页
On the basis of the airgun source signals recorded by the stations from January,2016 to June,2017,we use cross-correlation detection technology to obtain the characteristics of the stable phase travel time change of e... On the basis of the airgun source signals recorded by the stations from January,2016 to June,2017,we use cross-correlation detection technology to obtain the characteristics of the stable phase travel time change of each station.We used the Yunlong MS5.0 and Yangbi MS5.1 earthquakes as samples.According to regional characteristics,13 stations with high signal-to-noise ratios and complete data were selected(including 3 fixed stations and 10 active source stations).They are divided into four regions,and on the basis of the GNSS baseline data,the characteristics of regional wave velocity changes before and after the earthquake are analyzed.The results show that the station phase travel time change and the regional stress characteristics represented by the GNSS baseline data have good correlation in the short-term.Due to different degrees of regional stress,there are differences in the travel time changes of different stations in the four regions.Before the Yunlong MS5.0 and Yangbi MS5.1 earthquakes,with regional stress adjustment,there is an upward trend in the travel time changes of related stations in the adjacent areas of up to 0.02 s.The difference is that there are differences in the time nodes and duration of the travel time anomalies,and there is a reverse descent process after the Yangbi MS5.1 earthquake.There are different degrees of travel time fluctuations in the relevant stations before and after the two earthquakes,but the fluctuation range before and after the earthquake was small.Compared with the water level change of the reservoir,the adjustment of the regional stress is more likely to have a substantial impact on the travel time changes of the relevant stations. 展开更多
关键词 Airgun source CROSS-CORRELATION detection TRAVEL time change Yunlong M S5.0 EARTHQUAKE Yangbi M S5.1 EARTHQUAKE
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震后医护人员对受害人创伤应激恢复建模分析 预览
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作者 刘爽 汤亚箐 +3 位作者 范冬萍 黄映勤 何其英 张先庚 《灾害学》 CSCD 北大核心 2019年第4期185-190,共6页
创伤后应激障碍是震后受害人常见的心理障碍之一,针对震后受害人创伤应激恢复的干预众多,但是全面考虑创伤后应激障碍潜在症状和影响因素的干预措施不多。因此,震后医护人员对受害人进行创伤应激恢复建模分析,研究创伤后应激障碍潜在症... 创伤后应激障碍是震后受害人常见的心理障碍之一,针对震后受害人创伤应激恢复的干预众多,但是全面考虑创伤后应激障碍潜在症状和影响因素的干预措施不多。因此,震后医护人员对受害人进行创伤应激恢复建模分析,研究创伤后应激障碍潜在症状结构,通过创伤后应激障碍症状量表和医学编制的抑郁量表对受害人进行调查,发现精神痛苦唤起模型拟合度最高,且其外部区分效果较佳,模型中的精神痛苦唤醒症状、麻木性症状同震后受害人抑郁的相关度较高,可作为医护人员判定受害人创伤后应激症状的有效标准;医护人员可考虑人口社会学变量、地震暴露变量、社会支持等社会环境因素和地震后其他心理疾患及心理干预等因素,以团体干预、个体干预等形式对受害人创伤应激进行恢复。 展开更多
关键词 地震 震后 医护人员 受害人 创伤应激恢复 建模分析
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新时代地震档案开发与利用--传承"地震文化"服务防震减灾 预览
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作者 梁营 李学勤 《山西档案》 2019年第4期153-156,共4页
“地震文化”是人类与地震奋勇抗争的历史记录,承载着地震工作者开拓创新、不惧艰险、求真务实和坚守奉献的行业精神,凝聚着为人民谋幸福、谋安全的初心使命。传承“地震文化”,激发青年一代脚踏实地、专注学术、用科研创新支撑事业、... “地震文化”是人类与地震奋勇抗争的历史记录,承载着地震工作者开拓创新、不惧艰险、求真务实和坚守奉献的行业精神,凝聚着为人民谋幸福、谋安全的初心使命。传承“地震文化”,激发青年一代脚踏实地、专注学术、用科研创新支撑事业、引领发展的热忱,也推进研究所档案史料编研和利用工作,服务新时代防震减灾现代化建设,推动社会主义文化兴盛繁荣。 展开更多
关键词 地震 文化 防震减灾 服务
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新一代区划图对浙江省震害防御工作影响分析 预览
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作者 李敏 周新民 +1 位作者 陈涛 杨立国 《国际地震动态》 2019年第10期19-23,共5页
浙江省位于长江三角洲地区南部,是我国东部经济发达省份,国民经济发展位居前列,但是浙江省的抗震设防标准一直处于比较低的水平,而新一代的区划图对浙江省抗震设防标准有重大突破性调整。基于此,重点分析了第4、5代地震区划图的变化,以... 浙江省位于长江三角洲地区南部,是我国东部经济发达省份,国民经济发展位居前列,但是浙江省的抗震设防标准一直处于比较低的水平,而新一代的区划图对浙江省抗震设防标准有重大突破性调整。基于此,重点分析了第4、5代地震区划图的变化,以及由此带来的浙江省震害防御问题,提出了下一步的工作建议与对策思考。 展开更多
关键词 地震 区划图 浙江省 震害防御
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东汉时期的地震记录及其时空分布 预览
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作者 席境忆 《防灾科技学院学报》 2019年第3期90-95,共6页
目前对于历史时期地震史料的收集整理,学者往往只局限于“地震”“地动”等关键词的收集,却忽视了“山崩”“地裂”等相关字词记载,文章通过对《后汉书》“地震”“山崩”“地裂”记录的梳理,发现在东汉时期三者的概念互有交错,又相互... 目前对于历史时期地震史料的收集整理,学者往往只局限于“地震”“地动”等关键词的收集,却忽视了“山崩”“地裂”等相关字词记载,文章通过对《后汉书》“地震”“山崩”“地裂”记录的梳理,发现在东汉时期三者的概念互有交错,又相互区别。《后汉书》中的地震记载在有较强的时空规律,在空间上呈京师、甘青双中心“十”字型分布,时间上又呈现出中晚期多于早期的特点。早期地震活动的记载缺失,可能与档案散佚有关。 展开更多
关键词 东汉 地震 山崩 地裂 历史地震
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A Review of the Calculation Formula for the Four-component Borehole Strainmeter and Application to Earthquake Cases 预览
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作者 SU Kaizhi 《中国地震研究:英文版》 CSCD 2019年第1期132-146,共15页
Based on the principle formula for the four-component strainmeters, we can directly obtain the specific plane strain, shear strain and azimuthal angle of the principal strain, and the maximum and minimum principal str... Based on the principle formula for the four-component strainmeters, we can directly obtain the specific plane strain, shear strain and azimuthal angle of the principal strain, and the maximum and minimum principal strains calculated afterwards are the indirect result. The problems of practicality of the sensitivity coefficients A and B of plane strain and shear strain are then discussed. Based on this idea, we analyzed the observation data of several fourcomponent borehole strainmeters near the epicenter of the Yiliang MS5. 7 earthquake in 2012 and the Ludian MS6. 5 earthquake in 2014 in the Zhaotong area, Yunnan Province. The results show that the analysis based on the perspective of plane strain and shear strain has an obviously better effect than that based on the component readings, and can directly peel off the respective abnormality of the plane strain and shear strain. In addition, the correlation coefficient curves between measured data of two plane strains show significant anomalies which often occur several days before and during the earthquake. 展开更多
关键词 Four-component borehole strainmeter Ludian MS6. 5 EARTHQUAKE Yiliang MS5. 7 EARTHQUAKE Plane STRAIN ABNORMALITY Shear STRAIN ABNORMALITY SELF-TEST of data STRAIN anomaly
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Large Earthquake Prediction Methods 预览
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作者 Manana Kachakhidze Nino Kachakhidze-Murphy +1 位作者 Badri Khvitia Giorgi Ramishvili 《地震研究(英文)》 2019年第4期239-254,共16页
At the present time rather diverse and interesting papers are published on the basis of ground-based and satellite data of earth VLF/LF and ULF electromagnetic (EM) emissions observed during earthquake preparation per... At the present time rather diverse and interesting papers are published on the basis of ground-based and satellite data of earth VLF/LF and ULF electromagnetic (EM) emissions observed during earthquake preparation period. These phenomena are detectable both at laboratory and geological scale. Today in some seismic active countries of the world the network for collecting VLF/LF electromagnetic emissions generated during the process of the earthquake preparation has been organized. Permanent monitoring of frequency spectrum of earth VLF/LF electromagnetic emissions might turn out very useful with the view of prediction of large M ≥ 5 inland earthquakes. To prove the prediction capabilities of earth electromagnetic emissions authors have used avalanche-like unstable model of fault formation and an analogous model of electromagnetic contour, synthesis of which, is rather harmonious. According to the opinion of the authors EM emissions observed during earthquake preparation period are more universal and reliable than other earthquake indicators. In the presented paper, the possible methods of the large earthquake prediction are offered on the base of the European Network of Electromagnetic Radiation (INFREP) data existent before Crete earthquake with M = 5.6 (25/05/2016, 08:36:13 UTC) earthquake. Offered methods are capable of simultaneous determination of all three parameters necessary for incoming M ≥ 5 inland large earthquake prediction (magnitude, epicenter and time of occurring) with certain accuracy. 展开更多
关键词 EARTHQUAKE PRECURSOR VLF/LF RADIO-WAVES
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山区地震裂缝的特性及对输电线路的影响分析 预览
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作者 陈晓锋 李晓明 刘杰 《电力勘测设计》 2019年第5期65-70,共6页
四川属多山区,又是地震高发的地区,近些年发生了包括汶川8.0级地震、芦山7.0级地震及九寨沟7.0级地震等数次7级以上大地震,地震引发了大量的地质灾害,对灾区造成了的巨大的破坏。地震所形成的地裂缝,是地震引发次生地质灾害的一种,对地... 四川属多山区,又是地震高发的地区,近些年发生了包括汶川8.0级地震、芦山7.0级地震及九寨沟7.0级地震等数次7级以上大地震,地震引发了大量的地质灾害,对灾区造成了的巨大的破坏。地震所形成的地裂缝,是地震引发次生地质灾害的一种,对地震灾区的建筑物特别是对山区输电线路影响较大。本文根据近些年四川地震灾区典型地段地震地裂缝统计,分析了地震地裂缝类型、分布特征、性质及对输电线路的影响,并对工程处理措施进行了探讨。 展开更多
关键词 地震 地震裂缝 输电线路.
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Estimating the Probability of Earthquake Occurrence and Return Period Using Generalized Linear Models 预览
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作者 Shrestha Noora 《地球科学和环境保护期刊(英文)》 2019年第9期11-24,共14页
In this paper, the frequency of an earthquake occurrence and magnitude relationship has been modeled with generalized linear models for the set of earthquake data of Nepal. A goodness of fit of a statistical model is ... In this paper, the frequency of an earthquake occurrence and magnitude relationship has been modeled with generalized linear models for the set of earthquake data of Nepal. A goodness of fit of a statistical model is applied for generalized linear models and considering the model selection information criterion, Akaike information criterion and Bayesian information criterion, generalized Poisson regression model has been selected as a suitable model for the study. The objective of this study is to determine the parameters (a and b values), estimate the probability of an earthquake occurrence and its return period using a Poisson regression model and compared with the Gutenberg-Richter model. The study suggests that the probabilities of earthquake occurrences and return periods estimated by both the models are relatively close to each other. The return periods from the generalized Poisson regression model are comparatively smaller than the Gutenberg-Richter model. 展开更多
关键词 EARTHQUAKE Generalized Linear Model Gutenberg-Richter RELATION POISSON Regression SEISMIC HAZARD
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城市防震减灾方式分析与解读 预览
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作者 黄瑞滨 杨彦明 +2 位作者 齐彬彬 张剑影 郭延杰 《城市建筑》 2019年第8期22-23,共2页
地震作为一类极具破坏性的自然灾害,其造成的后果相当严重,使用有效方式提升城市防震减灾水平,不但能使城市灾害损失定量化评价成为可能,而且也能成为有效评估城市防震减灾能力的客观性度量标准,进而指导城市开展防震减灾决策工作,有着... 地震作为一类极具破坏性的自然灾害,其造成的后果相当严重,使用有效方式提升城市防震减灾水平,不但能使城市灾害损失定量化评价成为可能,而且也能成为有效评估城市防震减灾能力的客观性度量标准,进而指导城市开展防震减灾决策工作,有着相当重要的意义。本文分为5个部分,全面阐述了城市防震减灾情况,旨在为提升城市防震减灾工作水平提供参考资料。 展开更多
关键词 大中型城市 地震 防震减灾 应对方法
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A Preliminary Analysis of the Seismogenic Structure of the Akto MS6. 7 Earthquake Sequence on November 25, 2016 预览
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作者 LIANG Shanshan XU Zhiguo +2 位作者 CHEN Hongfeng ZOU Liye LIU Jingguang 《中国地震研究:英文版》 CSCD 2019年第3期418-430,共13页
In this study,data from the Xinjiang regional network and IRIS shared global stations are used to relocate the Akto MS6. 7 earthquake sequence on November 25,2016 by using double difference location method. Three eart... In this study,data from the Xinjiang regional network and IRIS shared global stations are used to relocate the Akto MS6. 7 earthquake sequence on November 25,2016 by using double difference location method. Three earthquakes of MS4. 8,MS6. 7 and MS5. 0 are inverted by using the g CAP method,and the focal mechanism solutions are obtained.According to the results of relocating,the location of the main shock is 39. 22°N,73. 98°E,the distribution of the earthquake sequence is about 70 km in length,and the focal depth is mainly within the range of 5-20 km. The plane and depth profiles of the earthquake sequence show that aftershocks extended in SEE direction after the main shock and the dip angle of fault plane is steep. Focal mechanism results show that the three earthquakes are characterized by strike-slip movement. Based on the results of field geological investigation,it is inferred that the seismogenic fault of the Akto earthquake is Muji fault,which is located at the northernmost end of the Kongur extensional system.The possible cause of this earthquake is that the Indian Plate continues to push northward,and during this compression process,the Indian Plate is affected by the clockwise rotation of the Tarim basin,which causes the accumulation of right-lateral action of the Muji fault,resulting in this earthquake. 展开更多
关键词 Akto MS6.7 earthquake Earthquake location Focal mechanism Muji fault Kongur extensional system
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Effects of the Nepal MS8. 1 Earthquake in 2015 on Seismic Activity in the Qinghai-Tibetan Plateau 预览
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作者 CHENG Guoliang ZHANG Yuansheng WEI Congxin 《中国地震研究:英文版》 CSCD 2019年第3期451-460,共10页
We obtained the displacement and deformation caused by the 2015 Nepal MS8. 1 earthquake adopting the finite element method,and analyzed the displacement and deformation characteristics and effect of three large earthq... We obtained the displacement and deformation caused by the 2015 Nepal MS8. 1 earthquake adopting the finite element method,and analyzed the displacement and deformation characteristics and effect of three large earthquakes on seismic activity in the Qinghai-Tibetan block. Our primary results suggest southward movement of the QinghaiTibetan block is caused by a large earthquake occurring on thrust fault in the Himalayan zone,the displacement direction is reverse to the background displacement. The occurrence of these large earthquakes will result in stress unloading and earthquake activity will be weakened in stress unloading areas. Through the simulation results,we can detect the distribution area of stress loading and unloading caused by large earthquakes.Simultaneously,it provides a fundamental evidence for determination of earthquake activity trend. 展开更多
关键词 Nepal MS8.1 earthquake Stress loading and unloading Earthquake quiescence Seismogenic region forecast
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龙门山断裂北川断裂带滑坡与构造活动关系研究 预览
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作者 李金洋 杨顺 +1 位作者 佘涛 陈欢 《人民长江》 北大核心 2019年第2期138-143,共6页
北川断裂带位于龙门山中央断裂带中部,新、老滑坡较为发育,构造活动是影响区内滑坡发生的主导因素。采用文献记载、现场调研等方法,分析了构造对滑坡灾害的影响,结果表明:①构造横向挤压、不均匀抬升对地表岩体的完整性进行改造,使得不... 北川断裂带位于龙门山中央断裂带中部,新、老滑坡较为发育,构造活动是影响区内滑坡发生的主导因素。采用文献记载、现场调研等方法,分析了构造对滑坡灾害的影响,结果表明:①构造横向挤压、不均匀抬升对地表岩体的完整性进行改造,使得不同构造部位、斜坡部位岩体存在结构差异,进而控制滑坡在空间上的发育规律,同时,细部构造结构面在空间上的产出关系构成了滑坡发生的初始边界条件;②作为构造活动的剧烈外部表现,地震动荷载直接诱发滑坡的同时造成斜坡岩体的松动;③'5·12'震后,区域构造应力方向发生近90°的偏转,进一步加剧了松动岩体的变形与破坏,震后应力偏转是影响区域斜坡稳定的最主要内动力因素。 展开更多
关键词 滑坡 构造应力 地震 北川断裂带 龙门山断裂
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Evaluation of a traditional method for peak flow discharge estimation for floods in the Wenchuan Earthquake area,Sichuan Province,China
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作者 GUO Xiao-jun CUI Peng +3 位作者 LI Yong LIU Jin-feng GE Yong-gang WANG Ci-de 《山地科学学报:英文版》 SCIE CSCD 2019年第3期641-656,共16页
Peak discharge of flood in small mountainous watershed is usually calculated using the 'Rainstorm–runoff calculation method in small watersheds in Sichuan Province'(RRM). This study evaluated the RRM calculat... Peak discharge of flood in small mountainous watershed is usually calculated using the 'Rainstorm–runoff calculation method in small watersheds in Sichuan Province'(RRM). This study evaluated the RRM calculation using real-time monitored rainfall and hydrologic data from a small watershed in the Wenchuan Earthquake area of Sichuan Province, China. The results indicated that the discharge values given by the RRM are commonly overestimating the measured discharge. The overestimation rate was discussed and empirical equations were proposed for improving RRM estimations, based on the relationship between calculated and measured discharge values at different watershed scales(2, 30, and 40 km2), under different rainfall probabilities(0.97–0.5, 0.5–0.2, and 0.2–0.002), and for different rainfall durations(0–6, 6–24, and >24 h). The results of this study help contribute to the understanding of water floods formation and help provide more accurate estimations of peak flow discharge in small watersheds in the Wenchuan Earthquake area. 展开更多
关键词 RAINFALL RUNOFF yield INFLUX PEAK DISCHARGE WENCHUAN Earthquake area
Seismic vulnerability assessment of urban buildings and traffic networks using fuzzy ordered weighted average
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作者 Yasaman ASADI Najmeh Neysani SAMANY Keyvan EZIMAND 《山地科学学报:英文版》 SCIE CSCD 2019年第3期677-688,共12页
Urban buildings and urban traffic network are considered as the vital arteries of cities which have particular effects especially after the crisis in the search and rescue operations. The aim of this study is to deter... Urban buildings and urban traffic network are considered as the vital arteries of cities which have particular effects especially after the crisis in the search and rescue operations. The aim of this study is to determine the vulnerability of urban areas especially, buildings and traffic networks using multicriteria geographic information systems and decisionmaking methods. As there are many effective criteria on the seismic vulnerability that they have uncertain and vague properties, the method of this paper is applying fuzzy ordered weighted average(OWA) to model the seismic vulnerability of urban buildings and traffic networks in the most optimistic and pessimistic states. The study area is district 6 of Tehran that is affected by the four major faults, and thus will be threatened by the earthquakes. The achieved results illustrated the vulnerability with different degrees of risk levels including very high, high, medium, low and very low. The results show that in the most optimistic case 14% and in the pessimistic case 1% of buildings tolerate in very low vulnerability. The vulnerability of urban street network also indicates that in the optimistic case 12% and in the pessimistic case at most 9% of the area are in appropriate condition and the North and NorthEast of the study area are more vulnerable than South of it. 展开更多
关键词 Earthquake Vulnerability Assessment URBAN BUILDINGS Traffic network MULTI-CRITERIA Decision Analysis(MCDA) Fuzzy-OWA
三维地震资料处理与解释一体化技术浅析 预览
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作者 郁元超 《建筑工程与管理》 2019年第3期104-106,共3页
三维地震资料处理与解释一体化技术在石油开采、煤炭开采中具有重要意义,可以提高储层识别的精准度。文章结合M区域的概况,对此项技术进行深入探究,主要涉及火成岩振幅透射补偿、网格层析速度建模、OVT域处理Lightning逆时偏处理、层位... 三维地震资料处理与解释一体化技术在石油开采、煤炭开采中具有重要意义,可以提高储层识别的精准度。文章结合M区域的概况,对此项技术进行深入探究,主要涉及火成岩振幅透射补偿、网格层析速度建模、OVT域处理Lightning逆时偏处理、层位解释、断裂解释等。目的是为相关人员提供参考,提高资源开采的效率、质量。 展开更多
关键词 资料处理 资料解释 一体化技术 地震
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