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Formation of the Yalong Downstream Terraces in the SE Tibetan Plateau and Its Implication for the Uplift of the Plateau

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Acta Geologica Sinica(English Edition) 2015年第2期89卷 542-560页

作者： he Zexin ZHANG Xujiao QIAO Yansong BAO Shuyan LU Chunyu he xiangli School of the Earth Sciences and Resources China University of Geosciences Institute of Geomechanics Chinese Academy of Geological Sciences Key Laboratory of Neotectonic Movement and Geohazard

The Yalong River is an important river that runs across the abruptly changing terrain of the SE Tibetan Plateau. The terraces and Quaternary sediments in its valleys preserve the information of tectonic uplift, climate changes, and landform evolution since the Middle Pleistocene. Based on geomorphological, sedimentological, and chronological investigations, 6-8 terraces are identified in the lower reaches of Yalong catchment and its tributary--the Anning River. The electron spin resonance （ESR） or optically stimulated luminescence （OSL） data on the alluvial sediments in the upper portion of terraces indicate that they formed in 1.10, 0.90, 0.72, 0.06-0.04, 0.03-0.02, and 0.01 Ma. Tectonic uplift and the climatic cycle controlled the formation of the Yalong River terraces. The former dominated the dissection depths and incision rates, whereas the latter controlled the transformation between accumulation, which developed during the glacial period, and incision, which developed during the glacial-interglacial transition. The Yalong downstream incised rapidly from 1.10 to 0.72 Ma and rapidly from 0.06 Ma until the present; the terraces developed during these two periods. The incision rates in space during the two periods indicate the uplifting extent of the Jinpingshan area, which decreases toward the east and the south. The results reveal two rapidly uplifting stages in the SE Tibetan Plateau, including an accelerated uplifting since 0.06 Ma. Since the Middle Pleistocene, the tectonic uplift of the SE and NE parts of the Tibetan Plateau is synchronous, according to the same development stages of the river terraces of the Yalong downstream and the Yellow River in the Lanzhou area of the NE Tibetan Plateau. The difference in the horizontal displacement between the Xianshuihe Fault and the Anninghe Fault bend resulted in the rapid uplift of the Jinpingshan area. The incision rate for the spatial distribution of the Yalong downstream is the geomorphologicai response of cru

关键词： Yalong downstream Anning River river terrace tectonic uplift climate change the Tibetan Plateau

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A New Insight into the Influence of Composition of Fault Rocks on Aseismic and Seismic Fault Slip

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 760-762页

作者： he xiangli LI Haibing WANG Huan SI Jialiang ZHANG Lei XU Zhiqin SUN Zhiming Key L aboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China School of Earth Sciences and Engineering Nanjing University Nanjing 210023 Jiangsu China Key Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Natural Resources Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China

Active faults can slip either slowly and continuously byaseismic creep, or abruptly by a seismic event. Both slipmodes of faults are closely related to the composition offault rocks. However, the actual materials resulting indifferences of slip behavior remain uncertain. TheGuanxian-Anxian fault (GAF) characterized by long-termaseismic creep and the Yingxiu-Beichuan fault (YBF)slipping by large earthquakes in the Longmen Shan faultzone (LSFZ) are ideal examples for exploring the aboveissues. here, in the light of observation and componentanalyses, we find that the distribution of carbonateminerals in both faults is distinct.

关键词： Seismic Fault Slip A New Insight Fault Rocks

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Landslides Triggered by the 2020 Qiaojia M_(w)5.1 Earthquake, Yunnan, China: Distribution, Influence Factors and Tectonic Significance

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Journal of Earth Science 2021年第5期32卷 1056-1068页

作者： xiangli he Chong Xu Wenwen Qi Yuandong Huang Jia Cheng Xiwei Xu Qi Yao Yongkun Lu Boyang Dai National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics(Under Construction) Ministry of Emergency Management of ChinaBeijing 100085China China University of Geosciences Beijing 100083China China Earthquake Networks Center Beijing 100045China Yunnan Earthquake Agency Kunming 650224China

On May 18, 2020, an M_(w)5.1 earthquake occurred in Qiaojia County, Yunnan Province, China. This moderate-sized event triggered massive coseismic landslides, resulting in some damage. In this work, through visual interpretation of high-resolution(0.8–2 m) Gaofen satellite images before and after the earthquake, 167 landslides were delineated, 18 of which were inspected in the field. Using the landslide number density(LND) and landslide area percentage(LAP), we characterized the spatial distribution of these landslides, and analyzed their possible influence factors and tectonic significance. The results show that these landslides are distributed mostly in the NW-SE direction, roughly parallel to the long axis of seismic intensity zones and the strike of the Xiaohe-Baogunao fault(XBF). The LND and LAP decrease with increasing distances to the fault and from the epicenter to fault ends of the XBF. These permit to suggest that the seismogenic fault of the Qiaojia earthquake is likely a hidden branch of the XBF. All of the landslides induced by this event occurred in the region with the seismic intensity of six degrees or greater of the 2014 M_(w)6.2 Ludian earthquake. Therefore, it was inferred that the 2020 Qiaojia earthquake was probably the subsequent release of accumulated elastic strain after the 2014 Ludian earthquake in a same tectonic stress regime.

关键词： Qiaojia earthquake landslide inventory spatial distribution seismogenic fault Ludian earthquake

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Effects of citrus fiber on the emulsifying properties and molecular structure of mutton myofibrillar protein:An underlying mechanisms study

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Food Bioscience 2023年第1期51卷 808-815页

作者： Chenyan Zhu Shunliang Zhang Ning Zhu Qianrong Wu Manting Du xiangli he Yanhong Bai Shouwei Wang College of Food and Bioengineering Zhengzhou University of Light IndustryZhengzhou450001China Beijing Academy of Food Sciences Beijing100068China

The effects of water-soluble citrus fiber(SCF)and water-insoluble citrus fiber(ICF)on emulsifying properties and molecular structure of the mutton myofibrillar protein(MP)were *** emulsifying activity index and emulsifying stability index of MP emulsion,treated with 5%SCF significantly improved to 36.80%and 65.27%,*** droplet size of the emulsion significantly reduced,forming smaller and more uniformly dispersed *** promoted the unfolding of MP,and showed a significant increased(phelix content and a significant enhancement(phe MP secondary *** EAI,ESI,and solubility of MP significantly decreased after the addition of ICF,but there was no significant change in the secondary *** data demonstrated that,the addition of the appropriate amount of SCF could improve the emulsifying properties and molecular structure of MP.

关键词： Citrus fiber Myofibrillar protein Emulsifying properties Molecular structure

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Spatial Distribution of Seismic Landslides in the Areas of 1927 Gulang M8.0 Earthquake

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Earthquake Research in China 2020年第1期34卷 5-28页

作者： XU Jixiang XU Chong he xiangli WEN Boyu GE Keshui BAI Yuzhu Key Laboratory of Active Tectonics and Volcano Institute of GeologyChina Earthquake AdministrationBeijing 100029China School of Engineering and Technology China University Of Geosciences(Beijing)Beijing 100083China Institute of Crustal Dynamics China Earthquake AdministrationBeijing 100085China

The 1927 Gulang M8.0 earthquake has triggered a huge number of landslides,resulting in massive loss of people’s life and ***,integrated investigations and results regarding the landslides triggered by this earthquake are rare;such situation hinders the deep understanding of these landslides such as scale,extent,and *** the support of Google Earth software,this study intends to finish the seismic landslides interpretation work in the areas of Gulang earthquake(VIII-XI degree)using the artificial visual interpretation method,and further analyze the spatial distribution and impact factors of these *** results show that the earthquake has triggered at least 936 landslides in the VIII-XI degree zone,with a total landslide area of 58.6 km^*** dense area of seismic landslides is located in the middle and southern parts of the X intensity *** analysis shows that seismic landslides is mainly controlled by factors such as elevation,slope gradient,slope direction,strata,seismic intensity,faults and *** elevation of 2000-2800 m is the high-incidence interval of the *** landslide density is larger with a higher slope *** and west directions are the dominant sliding *** areas with Cretaceous and Quaternary strata are the main areas of the Gulang seismic *** X intensity zone triggered the most *** addition,landslides often occur in regions near rivers and *** paper provides a scientific reference for exploring the development regularities of landslides triggered by the 1927 Gulang earthquake and effectively mitigating the landslide disasters of the earthquake.

关键词： Gulang earthquake Landslide Google Earth Artificial visual interpretation Spatial distribution

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An open-accessed inventory of landslides triggered by the M_(S)6.8 Luding earthquake,China on September 5,2022

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Earthquake Research Advances 2023年第1期3卷 37-44页

作者： Yuandong Huang Chenchen Xie Tao Li Chong Xu xiangli he Xiaoyi Shao Xiwei Xu Tao Zhan Zhaoning Chen National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing100085China China University of Geosciences(Beijing) Beijing100083China Institute of Disaster Prevention Sanhe065201China 107 Geological Team Chongqing Bureau of Geology and Minerals ExplorationChongqing401120China School of Emergency Management Science and Engineering University of Chinese Academy of SciencesBeijing100049China

This study constructs a preliminary inventory of landslides triggered by the M_(S) 6.8 Luding earthquake based on field investigation and human-computer interaction visual interpretation on optical satellite *** results show that this earthquake triggered at least 5007 landslides,with a total landslide area of 17.36 km^(2),of which the smallest landslide area is 65 m^(2)and the largest landslide area reaches 120747 m^(2),with an average landslide area of about 3500 m^(2).The obtained landslides are concentrated in the IX intensity zone and the northeast side of the seismogenic fault,and the area density and point density of landslides are 13.8%,and 35.73 km^(-2) peaks with 2 km as the search *** should be noted that the number of landslides obtained in this paper will be lower than the actual situation because some areas are covered by clouds and there are no available post-earthquake remote sensing *** on the available post-earthquake remote sensing images,the number of landslides triggered by this earthquake is roughly estimated to be up to *** study can be used to support further research on the distribution pattern and risk evaluation of the coseismic landslides in the region,and the prevention and control of landslide hazards in the seismic area.

关键词： Luding earthquake Landslide inventory Coseismic landslides Visual interpretation Field investigation

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Hazard Assessment of Co-seismic Landslides Based on Information Value Method:A Case in 2018 MW6.6 Hokkaido Earthquake,Japan

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Earthquake Research in China 2020年第1期34卷 64-80页

作者： WEN Boyu XU Chong he xiangli MA Siyuan SHAO Xiaoyi LI Kai ZHANG Zhongjian LI Zhengfang Key Laboratory of Active Tectonics and Volcano Institute of GeologyChina Earthquake AdministrationBeijing 100029China School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China Institute of Crustal Dynamics China Earthquake AdministrationBeijing 100085China

An MW6.6 earthquake occurred in eastern Hokkaido,Japan on September 6th,*** on the pre-earthquake image from Google Earth and the post-earthquake image from high resolution(3 m)planet satellite,we manually interpret 9293 coseismic landslides and select 7 influencing factors of seismic landslide,such as elevation,slope,slope direction,road distance,flow distance,peak ground acceleration(PGA)and ***,9293 landslide points are randomly divided into training samples and validation samples with a proportion of 7:*** detail,the training sample has 6505 landslide points and the validation sample has 2788 landslide *** hazard risk assessment of seismic landslide is conducted by using the information value method and the study area is further divided into five risk grades,including very low risk area,low risk area,moderate risk area high risk area and very high risk *** results show that there are 7576 landslides in high risk area and very high risk area,accounting for81.52%of the total landslide number,and the landslide area is 22.93 km^2,accounting for 74.35%of the total *** hazard zoning is in high accordance with the actual *** evaluation results are tested by using the curve of cumulative percentage of hazardous area and cumulative percentage of landslides *** results show that the success rate of the information value method is 78.50%and the prediction rate is 78.43%.The evaluation results are satisfactory,indicating that the hazard risk assessment results based on information value method may provide scientific reference for landslide hazard risk assessment as well as the disaster prevention and mitigation in the study area.

关键词： Hokkaido earthquake Co-seismic landslides Hazard risk assessment Information value method

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An open-accessed inventory of landslides triggered by the Ms 6.8 Luding earthquake, China on 5 September 2022

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Earthquake Research Advances 2022年

作者： Yuandong Huang Chenchen Xie Tao Li Chong Xu xiangli he Xiaoyi Shao Xiwei Xu Tao Zhan Zhaoning Chen 107 Geological Team Chongqing Bureau of Geology and Minerals Exploration National Institute of Natural Hazards Ministry of Emergency Management of China Institute of Disaster Prevention Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of China China University of Geosciences (Beijing) School of Emergency Management Science and Engineering University of Chinese Academy of Sciences

This study constructs a preliminary inventory of landslides triggered by the Ms 6.8 Luding earthquake based on field inPvestrigaetion-apnd hrumoano-comfputer interaction visual interpretation on optical satellite images. The results show that this earthquake triggered at least 5007 landslides, with a total landslide area of 17.36km2, of which the smallest landslide area is 65m2 and the largest landslide area reaches 120,747m2, with an average landslide area of about 3500m2. The obtained landslides are concentrated in the IX intensity zone and the northeast side of the seismogenic fault. We took a circle with a radius of 2km as the search area and conducted density statistics for the landslide area and density iJn eaoch usearrchn areaa. Tlh e maximum area density and point density of landslides is 13.8%, and 35.73 km-2, respectively. It should be noted that the number of landslides obtained in this paper will be lower than the actual situation because some areas are covered by clouds and there are no available post-earthquake remote sensing images. Based on the available post-earthquake remote sensing images, the number of landslides triggered by this earthquake is roughly estimated to be up to 10,000. This study can be used to support further research on the distribution pattern and risk evaluation of the co-seismic landslides in the region, and the prevention and control of landslide hazards in the seismic area.

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大直径偏心型文丘里施肥器优化设计与试验

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排灌机械工程学报 2024年第9期42卷 957-964页

作者：贺向丽唐中王鹏中国农业大学水利与土木工程学院北京100083 中国电建集团西北勘测设计研究院有限公司陕西西安710065

为改善现有大直径文丘里施肥器的吸肥性能,对其进行结构优化设计.基于大直径对称型文丘里施肥器(M型),对其改造设计为偏心型文丘里施肥器(P型).采用正交设计方法,应用数值模拟技术,以吸肥效率为评价指标确定P型文丘里施肥器最优结构参... 详细信息

为改善现有大直径文丘里施肥器的吸肥性能,对其进行结构优化设计.基于大直径对称型文丘里施肥器(M型),对其改造设计为偏心型文丘里施肥器(P型).采用正交设计方法,应用数值模拟技术,以吸肥效率为评价指标确定P型文丘里施肥器最优结构参数组合,并对2种施肥器进行试验测试和数值模拟对比分析.结果表明最优结构参数组合为喉管进口直径17 mm、扩散角3°、喉管出口直径20 mm、喉管凹槽宽度4 mm、喉管直线段长度16.6 mm、喉管凹槽直径27 mm、收缩角23.5°.通过试验测试对比分析,经结构优化后的P型施肥器较M型施肥器的最大吸肥流量提高了21.4%;在进口压力为0.25 MPa时,最大吸肥浓度提升了约30.7%,最大吸肥效率提升了约13.9%.流场分析表明,相较于M型施肥器,在相同的压差条件下,P型施肥器更不容易产生空化,并且P型文丘里施肥器流态更加稳定,能量损失更小.可见优化后的偏心型文丘里施肥器能提高吸肥性能.

关键词：偏心型文丘里施肥器结构优化正交设计吸肥性能

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基于潜水-承压水模型的民勤绿洲地下水位预测

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西南石油大学学报（自然科学版） 2015年第3期37卷 168-173页

作者：贺向丽叶懋蒋雨彤中国农业大学水利与土木工程学院北京海淀100083

基于20112012年观测数据，应用Feflow软件，构建了民勤绿洲地区的潜水承压水三维数值模型。应用该模型对研究区未来5～10 a内地下水位动态变化进行了预测。结果表明：目前用水条件下，经过一系列综合措施，地下水位下降趋势得到有效遏... 详细信息

基于20112012年观测数据，应用Feflow软件，构建了民勤绿洲地区的潜水承压水三维数值模型。应用该模型对研究区未来5～10 a内地下水位动态变化进行了预测。结果表明：目前用水条件下，经过一系列综合措施，地下水位下降趋势得到有效遏制；但在未来5～10 a内，民勤地下水位依然整体以低幅度持续下降。上游坝区的地下水漏斗日益扩大，下游湖区地下水漏斗因青土湖生态泄水而得到有效恢复，但随着地下水埋深日益增大，下游红沙梁区域出现了新的地下水漏斗。另外，当地符合植物存活条件（地下水埋深小于15 m）的区域面积也在逐年减小，其中地下水埋深小于10 m的面积减小幅度较大。

关键词：渗流潜水承压水地下水位预测数值模拟

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