Volume 27 Issue 1
Feb.  2021
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ZHAO Dongliang, LANCUO Zhuoma, HOU Guangliang, et al., 2021. Assessment of geological disaster susceptibility in the Hehuang Valley of Qinghai Province. Journal of Geomechanics, 27 (1): 83-95. DOI: 10.12090/j.issn.1006-6616.2021.27.01.009
Citation: ZHAO Dongliang, LANCUO Zhuoma, HOU Guangliang, et al., 2021. Assessment of geological disaster susceptibility in the Hehuang Valley of Qinghai Province. Journal of Geomechanics, 27 (1): 83-95. DOI: 10.12090/j.issn.1006-6616.2021.27.01.009

Assessment of geological disaster susceptibility in the Hehuang Valley of Qinghai Province

doi: 10.12090/j.issn.1006-6616.2021.27.01.009
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  • Received: 2020-02-22
  • Revised: 2020-04-03
  • Published: 2021-02-28
  • The Yellow River and Huangshui Valley, located at the northeast margin of the Qinghai-Tibet Plateau, are prone to geological disasters due to violent geological activities, large elevation difference and strong hydraulic power. In order to clarify the zoning of susceptibility of geological disasters in this area, an assessment index system is built by selecting factors such as geomorphology, slope, slope height, vegetation, lithology, rainfall, distance from faults, rivers and roads, using the information model to calculate the susceptibility index of collapse, landslide, debris flow and comprehensive geological disasters. The susceptibility of geological disasters in the study area can be divided into five grades: extremely high, high, medium, low and extremely low. The result shows that the extremely high susceptible areas are mainly in the valley areas, accounting for 2.03%, including the middle and lower reaches of the Yellow River and the Huangshui River in Guide county, Huangzhong county and Ledu county. The high susceptible areas are mainly in the areas on small and moderately undulating mountain basins, accounting for 21.2%. The medium susceptible area are mainly in the moderately undulating mountain areas, accounting for 23.45%, which belong to the transition areas of high and low susceptible areas. The low susceptible areas are mainly in moderately and sharply undulating mountain areas, accounting for 42.1%. The extremely low susceptible areas are mainly on the mountains such as the Lenglong mountain, Laji mountain and Xiqing mountain, accounting for 11.23%. The research result is of great significance to the disaster prevention and reduction in the Hehuang Valley and to the sustainable development of society.

     

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  • CHENG W M, ZHOU C H, CHAI H X, et al. , 2009. Quantitative extraction and analysis of basic morphological types of land geomorphology in China[J]. Journal of Geo-Information Science, 11(6): 725-736. (in Chinese with English abstract) http://www.cnki.com.cn/Article/CJFDTotal-DQXX200906009.htm
    CUI P, SU F H, ZOU Q, et al. , 2015. Risk assessment and disaster reduction strategies for mountainous and meteorological hazards in Tibetan Plateau[J]. Chinese Science Bulletin, 60(32): 3067-3077. (in Chinese with English abstract) doi: 10.1360/N972015-00849
    DAI F C, LEE C F, LI J, et al. , 2001. Assessment of landslide susceptibility on the natural terrain of Lantau island, Hong Kong[J]. Environmental Geology, 40(3): 381-391. doi: 10.1007/s002540000163
    DENG Y, ZHOU T G, JIANG W G, 2016. Assessment of geological disaster hazard and potential impact in Dujiangyan City[J]. Journal of Catastrophology, 31(2): 196-199, 212. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZHXU201602039.htm
    DONG Z P, YAO Z S, LEI F, 1992. Active faults and modern tectonic stress field in the region of eastern Qinghai[J]. Crustal Deformation and Earthquake, 12(4): 64-71. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DKXB199204009.htm
    FAN L F, HU R L, ZENG F C, et al. , 2012. Application of weighted information value model to landslide susceptibility assessment: a case study of Enshi City, Hubei Province[J]. Journal of Engineering Geology, 20(4): 508-513. (in Chinese with English abstract) http://d.wanfangdata.com.cn/Periodical/gcdzxb201204005
    GE Q S, ZOU M, ZHENG J Y, et al. , 2008. Integrated assessment of natural disaster risks in China[M]. Beijing: Science Press: 62-65. (in Chinese with English abstract)
    GUO B M, QUAN K X, 2019. ArcGIS-based disaster risk assessment of Longwu River basin in Qinghai Province[J]. Geology and Resources, 28(3): 289-292. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-GJSD201903011.htm
    HUANG R Q, LI Y G, 1991. Numerical simulation of bank slope deformation and failure mechanism of horizontal strata in three gorges reservior area[J]. Geological Hazards and Environment Preservation, 2(2): 23-31. (in Chinese)
    HUANG R Q, XU X N, TANG C, et al. , 2008. Geological environment assessment and geological hazards management[M]. Beijing: Science Press: 151-179. (in Chinese)
    JIA G Y, QUAN Y Q, LI Z H, et al. , 2014. Geo-hazards assessment for the Gansu segment in Bailongjiang River basin by using combination weighting method[J]. Journal of Glaciology and Geocryology, 36(5): 1227-1236. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-BCDT201405021.htm
    JIA X, LEE H F, CUI M C, et al. , 2019. Differentiations of geographic distribution and subsistence strategies between Tibetan and other major ethnic groups are determined by the physical environment in Hehuang Valley[J]. Science China Earth Sciences, 62(2): 412-422. doi: 10.1007/s11430-018-9301-5
    KOU L N, BIAN J, ZHANG T T, et al. , 2017. The application of GIS-based information method in susceptibility evaluation of regional geological hazards in Minhe County, Qinghai Province[J]. Northwestern Geology, 50(2): 244-248. (in Chinese with English abstract) http://www.zhangqiaokeyan.com/academic-journal-cn_northwestern-geology_thesis/0201254324483.html
    LI L P, LAN H X, GUO C B, et al. , 2017. Geohazard susceptibility assessment along the Sichuan-Tibet railway and its adjacent area using an improved frequency ratio method[J]. Geoscience, 31(5): 911-929. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-XDDZ201705004.htm
    LI Z S, 2003. The state of the art of the research on seismic landslide hazard at home and abroad[J]. Journal of Catastrophology, 18(4): 64-70. (in Chinese with English abstract)
    LIAO L P, YU M, WEN H T, et al. , 2019. Evaluation on the susceptibility of collapse and landslide in Rongxian County, Southeastern Guangxi[J]. Earth and Environment, 47(4): 518-526. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-DZDQ201904014.htm
    LIU C Z, LIU Y H, WEN M S, et al. , 2007. Research on the geo-hazards genesis and assessment in the Three Gorges reservoir of Changjiang River in China[M]. Beijing: Geological Publishing House. (in Chinese with English abstract)
    LIU X, 2014. Study on risk assessment of debris flow in Ashigong Gui De County, Qinghai Province[D]. Beijing: China University of Geosciences(Beijing). (in Chinese with English abstract)
    LIU Y, TANG C, FENG Y, 2013. Geological disaster risk assessment based on AHP information method[J]. Earth and Environment, 41(2): 173-179. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZDQ201302014.htm
    NI X J, NAN Y, 2014. Comprehensive assessment of geological disasters risk in Changbai Mountain region based on GIS[J]. Journal of Natural Disasters, 23(1): 112-120. (in Chinese with English abstract) http://www.researchgate.net/publication/286990491_Comprehensive_assessment_of_geological_disasters_risk_in_Changbai_Mountain_region_based_on_GIS
    Qinghai Provincial Bureau of Statistics, 2016. Qinghai statistical yearbook in 2016[M]. Beijing: China Statistical Publishing House. (in Chinese with English abstract)
    RUAN S Y, HUANG R Q, 2001. Application of GIS-based information model on assessment of geological hazards risk[J]. Journal of Chengdu University of Technology, 28(1): 89-92. (in Chinese with English abstract) http://www.researchgate.net/publication/295791575_Application_of_Gis-based_information_model_on_assesment_of_geological_hazards_risk
    SHEN L, YAO J H, 1995. Industrial development and layout of Hehuang Valley in eastern Qinghai[J]. Economic Geography, 15(3): 66-72. (in Chinese)
    SUN W F, TAN C X, WANG J M, et al. , 2008. Geohazard susceptibility evaluation of Qianyang County, Baoji area, Shaanxi, China[J]. Geological Bulletin of China, 27(11): 1846-1853. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZQYD200811015.htm
    SUN Y P, ZHANG S P, CHEN W K, et al. , 2018. Risk Assessment of Landslides Caused by Wenchuan Earthquakes: A Case Study in the Wudu District and Wenxian County, Gansu Province[J]. China Earthquake Engineering Journal, 40(5): 1084-1091. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-ZBDZ201805032.htm
    TAN S C, ZHAO X Y, LI Y P, et al. , 2018. Risk assessment on the geological disasters based on GIS and information content model: Taking Qiubei County, Yunnan Province as an example[J]. Journal of Northwest Normal University (Natural Science), 54(1): 67-76. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-XBSF201801012.htm
    TANG C, MA G C, 2015. Small regional geohazards susceptibility mapping based on geomorphic unit[J]. Scientia Geographica Sinica, 35(1): 91-98. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DLKX201501011.htm
    WANG C M, HUANG J, LI Q, et al. , 2019. Evaluation of geological hazard vulnerability in Lyuliang City in Shanxi Province based on coupling of information content model and Logistic regression model[J]. Water Resources and Hydropower Engineering, 50(3): 132-138. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-SJWJ201903018.htm
    WANG N T, PENG K, LI Q H, et al. , 2012. Quantitative evaluation of geological disaster liability based on RS & GIS analysis: a case study of Wufeng County, Hubei Province[J]. Earth Science Frontiers, 19(6): 221-229. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DXQY201206028.htm
    WANG T, 2010. Study on seismic landslide hazard assessment in Wenchuan earthquake severely afflicted area[D]. Beijing: Chinese Academy of Geological Sciences. (in Chinese)
    WEI G, YIN Z Q, SHI L Q, et al. , 2013. Zoning of geological disasters of Hualong County in Qinghai Province[J]. The Chinese Journal of Geological Hazard and Control, 24(1): 86-92. (in Chinese with English abstract)
    WEI Z J, MA H L, TANG D L, 2017. Trend assessment of typhoon disasters based on the improved entropy method[J]. Journal of Catastrophology, 32(3): 7-11. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZHXU201703002.htm
    WU B, ZHAO F S, DUAN Z, et al. , 2018. Application of attribute recognition model based on coefficient of entropy to hazard degree evaluation of soil landslide in Shaanxi[J]. Journal of Catastrophology, 33(1): 140-145. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZHXU201801025.htm
    XIONG C L, CHEN L, WEI C L, et al. , 2012. Main geohazard types in Longling segment of the Dali-Ruili railway, western Yunnan and their development characteristics[J]. Geological Bulletin of China, 31(2-3): 396-405. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZQYD2012Z1024.htm
    XU Y, 2013. The geological hazards sensitivity assessment based on GIS in Huzhu County[D]. Beijing: China University of Geosciences(Beijing). (in Chinese)
    YANG Z H, ZHANG Y S, GUO C B, et al. , 2018. Sensitivity analysis on causative factors of geohazards in eastern margin of Tibetan plateau[J]. Journal of Engineering Geology, 26(3): 673-683. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-GCDZ201803014.htm
    YE J, 2011. Fuzzy cross entropy of interval-valued intuitionistic fuzzy sets and its optimal decision-making method based on the weights of alternatives[J]. Expert Systems with Applications, 38(5): 6179-6183. doi: 10.1016/j.eswa.2010.11.052
    YUAN X Q, ZHAO F S, CHEN X J, et al. , 2017. Zoning of geological hazards' susceptibility evaluation in Suide County of Shaanxi Province[J]. Journal of Catastrophology, 32(1): 117-120, 125. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZHXU201701021.htm
    ZENG L K, XU M, FANG Q, et al. , 2010. Vegetation and development of geological hazards[J]. Journal of Geological Hazards and Environment Preservation, 21(3): 97-100. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZHB201003020.htm
    ZHANG C S, HAN J L, SUN W F, et al. , 2008. Assessments of geohazard danger zoning in Longxian County, Shaanxi, China[J]. Geological Bulletin of China, 27(11): 1795-1801. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZQYD200811009.htm
    ZHANG X Y, ZHANG C S, MENG H J, et al. , 2018. Landslide susceptibility assessment of new Jing-Zhang high-speed railway based on GIS and information value model[J]. Journal of Geomechanics, 24(1): 96-105. (in Chinese with English abstract) http://d.wanfangdata.com.cn/periodical/dzlxxb201801011
    ZHANG Z X, 2004. Geography of Qinghai[M]. Xining: Qinghai People's Publishing House: 62-210. (in Chinese)
    ZHOU J J, ZHANG X M, ZHAO F S, et al. , 2019. Research on risk assessment of geological hazards in Qinling-Daba mountain area, south Shaanxi Province[J]. Journal of Geomechanics, 25(4): 544-553. (in Chinese with English abstract)
    程维明, 周成虎, 柴慧霞, 等, 2009. 中国陆地地貌基本形态类型定量提取与分析[J]. 地球信息科学学报, 11(6): 725-736. https://www.cnki.com.cn/Article/CJFDTOTAL-DQXX200906009.htm
    崔鹏, 苏凤环, 邹强, 等, 2015. 青藏高原山地灾害和气象灾害风险评估与减灾对策[J]. 科学通报, 60(32): 3067-3077. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB201532007.htm
    邓越, 周廷刚, 蒋卫国, 2016. 都江堰市地质灾害危险性及潜在影响评估[J]. 灾害学, 31(2): 196-199, 212. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHXU201602039.htm
    董治平, 姚政生, 雷芳, 1992. 青海东部活断层与现代构造应力场[J]. 地壳形变与地震, 12(4): 64-71. https://www.cnki.com.cn/Article/CJFDTOTAL-DKXB199204009.htm
    范林峰, 胡瑞林, 曾逢春, 等, 2012. 加权信息量模型在滑坡易发性评价中的应用: 以湖北省恩施市为例[J]. 工程地质学报, 20(4): 508-513. https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201204005.htm
    葛全胜, 邹铭, 郑景云, 等, 2008. 中国自然灾害风险综合评估初步研究[M]. 北京: 科学出版社: 62-65.
    郭邦梅, 权开兄, 2019. 基于ArcGIS的青海隆务河流域灾害风险性评价[J]. 地质与资源, 28(3): 289-292. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSD201903011.htm
    黄润秋, 李曰国, 1991. 三峡库区水平岩层岸坡变形破坏机制的数值模拟研究[J]. 地质灾害与环境保护, 2(2): 23-31. https://www.cnki.com.cn/Article/CJFDTOTAL-DZHB199102004.htm
    黄润秋, 许向宁, 唐川, 等, 2008. 地质环境评价与地质灾害管理[M]. 北京: 科学出版社: 151-179.
    贾贵义, 全永庆, 黎志恒, 等, 2014. 基于组合赋权法的白龙江流域甘肃段地质灾害危险性评价[J]. 冰川冻土, 36(5): 1227-1236. https://www.cnki.com.cn/Article/CJFDTOTAL-BCDT201405021.htm
    贾鑫, 李峯, 崔梦淳, 等, 2019. 河湟谷地藏族和其他主要民族分布的地理环境特征及其生产方式差异[J]. 中国科学: 地球科学, 49(4): 706-716. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK201904006.htm
    寇丽娜, 边疆, 张婷婷, 等, 2017. 基于GIS的信息量法在青海民和区域地质灾害易发性评价中的应用[J]. 西北地质, 50(2): 244-248. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDI201702026.htm
    李郎平, 兰恒星, 郭长宝, 等, 2017. 基于改进频率比法的川藏铁路沿线及邻区地质灾害易发性分区评价[J]. 现代地质, 31(5): 911-929. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ201705004.htm
    李忠生, 2003. 国内外地震滑坡灾害研究综述[J]. 灾害学, 18(4): 64-70. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHXU200304013.htm
    廖丽萍, 于淼, 文海涛, 等, 2019. 广西东南部容县崩塌滑坡的易发性评价[J]. 地球与环境, 47(4): 518-526. https://www.cnki.com.cn/Article/CJFDTOTAL-DZDQ201904014.htm
    刘传正, 刘艳辉, 温铭生, 等, 2007. 长江三峡库区地质灾害成因与评价研究[M]. 北京: 地质出版社.
    刘玄, 2014. 青海省贵德县阿什贡泥石流群风险性评价[D]. 北京: 中国地质大学(北京).
    刘洋, 唐川, 冯毅, 2013. 基于AHP-信息量法的地质灾害危险性评价[J]. 地球与环境, 41(2): 173-179. https://www.cnki.com.cn/Article/CJFDTOTAL-DZDQ201302014.htm
    倪晓娇, 南颖, 2014. 基于GIS的长白山地区地质灾害风险综合评估[J]. 自然灾害学报, 23(1): 112-120. https://www.cnki.com.cn/Article/CJFDTOTAL-ZRZH201401019.htm
    青海省统计局, 2016. 青海统计年鉴2016[M]. 北京: 中国统计出版社.
    阮沈勇, 黄润秋, 2001. 基于GIS的信息量法模型在地质灾害危险性区划中的应用[J]. 成都理工学院学报, 28(1): 89-92. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG200101017.htm
    沈镭, 姚建华, 1995. 青海东部河湟谷地工业发展与布局[J]. 经济地理, 15(3): 66-72. https://www.cnki.com.cn/Article/CJFDTOTAL-JJDL503.013.htm
    孙炜锋, 谭成轩, 王继明, 等, 2008. 陕西宝鸡地区千阳县地质灾害易发性评价[J]. 地质通报, 27(11): 1846-1853. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200811015.htm
    孙艳萍, 张苏平, 陈文凯, 等, 2018. 汶川地震滑坡危险性评价: 以武都区和文县为例[J]. 地震工程学报, 40(5): 1084-1091. https://www.cnki.com.cn/Article/CJFDTOTAL-ZBDZ201805032.htm
    谈树成, 赵晓燕, 李永平, 等, 2018. 基于GIS与信息量模型的地质灾害危险性评价: 以云南省丘北县为例[J]. 西北师范大学学报(自然科学版), 54(1): 67-76. https://www.cnki.com.cn/Article/CJFDTOTAL-XBSF201801012.htm
    唐川, 马国超, 2015. 基于地貌单元的小区域地质灾害易发性分区方法研究[J]. 地理科学, 35(1): 91-98. https://www.cnki.com.cn/Article/CJFDTOTAL-DLKX201501011.htm
    王昌明, 黄健, 李桥, 等, 2019. 基于信息量模型与Logistic回归模型耦合的山西吕梁市地质灾害易发性评价研究[J]. 水利水电技术, 50(3): 132-138. https://www.cnki.com.cn/Article/CJFDTOTAL-SJWJ201903018.htm
    王宁涛, 彭轲, 黎清华, 等, 2012. 基于RS和GIS的地质灾害易发性定量评价: 以湖北省五峰县为例[J]. 地学前缘, 19(6): 221-229. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201206028.htm
    王涛, 2010. 汶川地震重灾区地质灾害危险性评估研究[D]. 北京: 中国地质科学院.
    魏刚, 殷志强, 史立群, 等, 2013. 青海化隆县地质灾害易发性区划[J]. 中国地质灾害与防治学报, 24(1): 86-92. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGDH201301019.htm
    魏章进, 马华铃, 唐丹玲, 2017. 基于改进熵值法的台风灾害风险趋势评估[J]. 灾害学, 32(3): 7-11. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHXU201703002.htm
    吴博, 赵法锁, 段钊, 等, 2018. 基于熵权的属性识别模型在陕西土质滑坡危险度评价中的应用[J]. 灾害学, 33(1): 140-145. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHXU201801025.htm
    熊昌利, 陈亮, 魏昌利, 等, 2012. 滇西大理至瑞丽铁路龙陵段主要的地质灾害类型及其发育规律[J]. 地质通报, 31(2-3): 396-405. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD2012Z1024.htm
    徐媛, 2013. 基于GIS的互助县地质灾害易发性评价研究[D]. 北京: 中国地质大学(北京).
    杨志华, 张永双, 郭长宝, 等, 2018. 青藏高原东缘地质灾害影响因子敏感性分析[J]. 工程地质学报, 26(3): 673-683. https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201803014.htm
    袁湘秦, 赵法锁, 陈新建, 等, 2017. 陕西省绥德县地质灾害易发性区划[J]. 灾害学, 32(1): 117-120, 125. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHXU201701021.htm
    曾令科, 许模, 方琼, 等, 2010. 植被与地质灾害发育分布关系初探[J]. 地质灾害与环境保护, 21(3): 97-100. https://www.cnki.com.cn/Article/CJFDTOTAL-DZHB201003020.htm
    张春山, 韩金良, 孙炜锋, 等, 2008. 陕西陇县地质灾害危险性分区评价[J]. 地质通报, 27(11): 1795-1801. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200811009.htm
    张向营, 张春山, 孟华君, 等, 2018. 基于GIS和信息量模型的京张高铁滑坡易发性评价[J]. 地质力学学报, 24(1): 96-105. https://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20180111&journal_id=dzlxxb
    张忠孝, 2004. 青海地理[M]. 西宁: 青海人民出版社: 62-210.
    周静静, 张晓敏, 赵法锁, 等, 2019. 陕南秦巴山区地质灾害危险性评价研究[J]. 地质力学学报, 25(4): 544-553. https://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20190412&journal_id=dzlxxb
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