Risk management study on impulse waves generated by Hongyanzi landslide in Three Gorges Reservoir of China on June 24, 2015   总被引：3，自引：1，他引：2  

Bolin Huang  Yueping Yin  Chunlan Du 《Landslides》2016,13(3):603-616

On June 24, 2015, Hongyanzi slope located in Wushan County of the Three Gorges Reservoir collapsed, generating 5–6-m-high impulse waves, which overturned 13 boats, killed 2 persons, and injured 4 persons. It is the second incident of landslide-generated impulse waves since the 175-m experimental impoundment in 2008. The emergency investigation shows that Hongyanzi landslide is a bedding soil landslide with a volume of 23?×?10⁴ m³ induced by a series of triggering factors such as rainfall, flooding upstream, and reservoir drawdown. The nonlinear Boussinesq water wave model is used to reproduce the impulse waves generated by the landslide of June 24th. The numerical simulation results suggest that the wave propagation process was influenced by the T-shaped geomorphic conditions of river valley, and the coastal areas in the county seat were the major wave-affected areas, which is opposite to the landslide. The numerical wave process accord well with the observed incident, and the investigation values were in good agreement with the calculated values. Moreover, the worst-case scenario of the 7?×?10⁴ m³ deformation mass beside Hongyanzi landslide is potential to generate impulse waves, which was predicted with the same numerical model. This adjacent deformation mass will probably generate impulse waves with maximum height and run-up of 2.2 and 2.0 m, respectively, and only a very few areas in the water course had waves rising to a height of 1 m or above. The research results provide a technical basis for emergency disposal to Hongyanzi landslide and navigation restriction in Wushan waterway. More importantly, it pushes the risk management of the navigation based on the impulse wave generated by landslide. It is advised that the Three Gorges Reservoir and other reservoirs around the world should put more efforts in performing special surveys and studies on the potential hazards associated with landslide-generated impulse waves.  相似文献   

井筒电加热改善水平井蒸汽吞吐效果机理实验     

吴永彬  吕柏林  杜宣  卢迎波  蒋有伟  邢向荣 《现代地质》2021,35(4):1136-1146

针对稠油水平井蒸汽吞吐面临入井渗流阻力大、产量水平低、吞吐递减率高、采收率偏低等问题,提出了电加热辅助水平井蒸汽吞吐方法。首先根据水平井蒸汽吞吐过程中的电加热与蒸汽复合传热特征,建立了电加热辅助蒸汽吞吐三个阶段的(注汽阶段、焖井阶段、生产阶段)储层升温解析模型,在此基础上,设计并开展了电加热辅助蒸汽吞吐和常规水平井吞吐的宏观比例物理模拟对比实验,通过实验验证了解析公式,揭示电加热改善水平井吞吐效果关键机理,并利用实际典型井模型进行了潜力预测。结果表明:电加热协同蒸汽吞吐,具有注蒸汽阶段实现水平段均匀加热升温、焖井阶段持续热补偿加热近井地带、生产阶段降低原油入井渗流阻力并提高吞吐产量的关键机理。典型井组预测电加热辅助水平井吞吐可提高吞吐采收率9.4%,油汽比从0.14提高到0.23,在水平井蒸汽吞吐油藏具有重要应用潜力。  相似文献   

Reply     

F. Ashkar  B. Bobée 《Stochastic Hydrology and Hydraulics》1989,3(1):69

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对于点苍山-石鼓变质带区域划分的意见   总被引：9，自引：7，他引：9  

翟明国  从柏林 《岩石学报》1993,9(3):227-239

在以往的研究中,点苍山和哀牢山被认为是同一个变质带。对石鼓带的划分也有很大争议。本文通过岩石学和同位素年代学的研究,认为点苍山和石鼓变质带同为扬子基底的一部分,应属于滇东变质区。它们是在元谋-大红山群之上发育的一套中晚元古变质岩带,具陆内地台型火山-沉积的特点。  相似文献   

Ultra-high pressure metamorphic rocks in the Dabie-Su-Lu region, China: Their formation and exhumation   总被引：17，自引：0，他引：17  

Cong  Bolin  Wang  Qingchen  Zhai  Mingguo  Zhang  Ruyuan  Zhao  Zhongyan Ye  Kai 《Island Arc》1994,3(3):135-150

Abstract Based on petrological, structural, geological and geochronological research, the authors summarize the progress of ultra-high pressure (UHP) metamorphic rock study since 1989 by Chinese geoscientists and foreign geoscientists in the Dabie-Su-Lu region. The authors introduce and discuss a two-stage exhumation process for the UHP metamorphic rocks that have various lithologies; eclogite, ultramafics, jadeitic quartzite, gneiss, schist and marble. The metamorphic history of UHP metamorphic rocks is divided into three stages, that is, the pre-eclogite stage, coesite eclogite stage, and retrograde stage. Prior to UHP metamorphism, the ultramafics had a high temperature environment assemblage of mantle and others had blueschist facies assemblages. The granulite facies assemblages, which have recorded a temperature increase event with decompression, have developed locally in the Weihai basaltic rocks. Isotopic ages show a long range from > 700 Ma to 200 Ma. The diversity in protoliths of UHP metamorphic rocks may be related to the variation of isotopic ages older than 400 Ma. The Sm-Nd dating of ~ 220 Ma could reflect the initial exhumation stage after the peak UHP metamorphism in relation to the collision between the Sino-Korean and Yangtze blocks and subsequent events. Petrological and structural evidence imply a two-stage exhumation process. During the initial exhumation, the UHP metamorphic rocks were sheared and squeezed up in a high P/T regime. In the second exhumation stage the UHP metamorphic rocks were uplifted and eventually exposed with middle crustal rocks.  相似文献   

Tourism, Technology and Competitive Strategies By A. Poon     

Bob Garnham 《New Zealand geographer》1995,51(2):62a-63

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SIMPLIFICATION OF THE OXYGEN-ABSORPTION COEFFICIENT FORMULA IN MICROWAVE BAND          下载免费PDF全文

Zhao Bolin  Liu Wen  Tang Chengxian 《Acta Meteorologica Sinica》1990,4(3):276-286

Study of the oxygen-absorption coefficient in 5mm wave band is important for remote sensing of theatmospheric temperature profile from satellites or ground.In order to obtain the atmospheric temperatureprofile rapidly and accurately,it is necessary to have a simple,but accurate formula of the oxygen-absorp-tion coefficient.In this paper,formulae of the oxygen-absorption coefficient in a certain range of tempera-ture-pressure and at a standard isobaric surface have been derived.These formulae may substitute for Meeks-Lilley formula in remote sensing of the atmosphere.  相似文献   

On Eastern Asian Dust Storm     

Zhao Bolin  Yu Xiaoding 《大气科学进展》1990,7(1):11-26

In this paper, the characteristics of eastern Asian dust storm are examined with emphasis on the satellite measurements of aerosol optical thickness. The reflectivity of solar radiation from the earth’s atmosphere depends on the optical thickness. The satellite measurement of radiance of sunlight, scattered by the earth and its atmosphere, is used to derive the properties of aerosol on oceanic surfaces. This paper involves the following: (1) investigation of the measurement of dust storm over the oceanic surface by GMS satellite; (2) investigation of the measurement of dust storm over the land surface by ground-based instruments such as actinometer, lidar, etc.; (3) for comparison, de-riving an atmospheric aerosol size distribution over the oceanic surface of calm weather through measurements of NOAA satellite; and (4) the weather process and its mass load of eastern Asian dust storm.  相似文献   

Industry,employment and regions: geographical perspectives on working nation     

Phillip O'Neill  Bob Fagan 《The Australian geographer》1994,25(2):101-102

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核测井曲线高分辨率处理技术及其应用   总被引：1，自引：0，他引：1  

蔡柏林  安丰全 《现代地质》1996,10(2):260-266

着重探讨了放射性测井曲线中自然伽马测井曲线、补偿中子测井曲线和补偿密度测井曲线的高分辨率处理方法及其应用效果。对于自然伽马及自然伽马能谱测井曲线，采用反褶积技术和有效的噪音压制技术；对于补偿中子测井曲线和补偿密度测井曲线采用了改进的α因子法。可以发现：高分辨率处理技术可明显地改善有关曲线的纵向分层能力；处理后的曲线与岩心柱状图及与微球、微电极等高分辨率曲线进行对比，其相关性有很大的改善；应用高分辨率处理后的曲线求薄层的泥质含量等参数，其相对误差明显下降。  相似文献