检索结果-南通市图书馆

Pedosphere 2012年第1期22卷 1-12页

作者： YUAN Bing-Cheng yue dong-xia School of Real Estate Beijing Normal University Zhuhai CampusZhuhai 519087(China) MOE Key Laboratory of Western China's Environmental System Lanzhou UniversityLanzhou 730000(China)

Successional and seasonal effects on soil microbial and enzymatic properties were studied in Chinese pine （Pinus tabulaeformis） plantations in an age sequence of 3-, 7-, 13-, 21- and 28-year-old in northern Ziwuling region in the middle of Loess Plateau, China. The results indicated that plantation age and season affected soil microbial and enzymatic parameters significantly. Soil organic C, total N, microbial biomass C, microbial quotient, basal respiration, dehydrogenase, N-α-benzoyl-L-argininamide （BAA）-protease, urease and β-glucosidase increased quickly and tended to be highest at PF21 （21-year plantation）, thereafter they remained nearly at a constant level, whereas the metabolic quotient （qCO2） showed an initial increase and then decreased gradually. Measures of these soil properties showed significant seasonal fluctuations except for organic C and total N, which were found to be relatively stable throughout the study period, and the seasonal distributions were autumn 〉 spring 〉 summer 〉 winter for microbial biomass C, microbial quotient, dehydrogenase, and β-glucosidase; autumn 〉 summer 〉 spring 〉 winter for BAA-protease and urease; and summer 〉 autumn 〉 spring 〉 winter for basal respiration and qCO2. Significant season x age interaction was observed for biomass C, basal respiration, dehydrogenase and BAA-protease.

关键词： dehydrogenase metabolic quotient microbial biomass seasonality soil basal respiration

Rapid onset hazards,fault-controlled landslides and multi-method emergency decision-making

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Journal of Mountain Science 2022年第5期19卷 1357-1369页

作者： GUO Fu-yun MENG Xing-min QI Tian-jun DIJKSTRA Tom THORKILDSEN Jarsve Kristine yue dong-xia CHEN Guan ZHANG Yi DOU xiao-dong SHI Peng-qing College of Earth and Environmental Sciences MOE Key Laboratory of Western China's Environmental SystemsLanzhou UniversityLanzhou 730000China Geological Environment Monitoring Lnstitute of Gansu Province Lanzhou 730050China School of Earth Sciences Lanzhou UniversityLanzhou 730000China Technology&Innovation Centre for Environmental Geology and Geohazards Prevention Lanzhou 730000China School of Architecture Building and Civil EngineeringLoughborough UniversityLoughboroughLE113TUUK

Numerous large-scale fragmented bedrock landslides developed along major fault system is a world-wide phenomenon,which are often characterized with repeated reactivation throughout *** to the large-scale and deep-seated features,it is normally difficult to control such landslides,which in turn pose great threat to local residents and ***,monitoring and forecasting these gigantic landslides has become a key protocol for risk *** paper introduces such a typical massive landslide,named Yahuokou landslide,besides Min River in Zhouqu County,Gansu Province,*** on July 16,2019 with a volume of approximately 4×106 m3,moving slowly and transitionally starting from top part,its toe had partially blocked the Min River and destroyed roads and houses eventually by August 11,*** to emergency response for such huge slowmoving landslide,there is no standard national ***,how to make effective emergency decision has become a *** on previous experiences,integrated multi-methods,including UAV imagery interpretation,we applied GNSS monitoring and field investigations in the early stages of landsliding,in order to assist the *** results show that the movement path of the current displacement is consistent with that of the 1989 reactivation event,and the slide body was separated into three relatively independent blocks with different sliding velocities and responses to *** upper and lower blocks appeared less affected by rainfall,while the middle block responded more to the changes in *** proves that the combined approaches using a variety of monitoring techniques can play an effective role in the monitoring of rapidly deformed transitional largescale landslides,and can also provide a set of reference methods for the emergency disposal of similar landslide hazards.

关键词： Yahuokou landslide Rapid detection Disaster pattern Movement process

Ecological risk assessment of the Gannan Plateau,northeastern Tibetan Plateau

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Journal of Mountain Science 2018年第6期15卷 1254-1267页

作者： yue dong-xia ZENG Jian-jun YANG Chao ZOU Ming-liang LI Kai CHEN Guan-guang GUO Jian-jun Xu xiao-feng Meng Xing-min Key Laboratory of Western China＇s Environmental Systems （Ministry of Education） College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China Key Laboratory of Desert and Desertification Northwest Institute of Eeo-Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China School of Management Lanzhou University Lanzhou 730000 China

Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formulating environmental management strategies yet little attention to this region. In this study, we established an ecological risk assessment index system based on 30 evaluation indices in the categories of hydrometeorology, ecological environment, ground surface disturbance, and society and economy for the Gannan Plateau. An entropy method was used to calculate an index weight,and subsequently the matter-element method was used together with extension theory to establish a matter-element extension model of ecological risk. We assessed the ecological risk in this region by calculating the degree of association between index layer, system layer and target layer, and the cumulative ecological risk index. The degrees of ecological risk for the counties of the region were determined by using Arc GIS which would represent a spatial heterogeneity of the risk grade in production. Our results showed that the areas of high ecological risk were in Zhouqu County and Zhuoni County, and others were of low risk(Hezuo City, Diebu County, xiahe County and Lintan County) or intermediate risk(Maqu County). The results of the assessment were in accord with the actual observed situation. Thus, our ecological risk assessment index system is appropriate for this region and suggests that high risk counties need a priori ecological protection. Such research could provide a technological support which would potentially prevent or reduce disasters by establishing an ecological barrier to promote the sustainable development of Gannan Plateau.

关键词： Matter-element Extension theory Ecological risk assessment Ecosystem GannanPlateau

Landslide mapping and analysis along the China-Pakistan Karakoram Highway based on SBAS-InSAR detection in 2017

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Journal of Mountain Science 2021年第10期18卷 2540-2564页

作者： SU xiao-jun ZHANG Yi MENG Xing-min yue dong-xia MA Jin-hui GUO Fu-yun ZHOU Zi-qiang REHMAN Mohib Ur KHALID Zainab CHEN Guan ZENG Run-qiang ZHAO Fu-meng College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China School of Earth Sciences Lanzhou UniversityLanzhou 730000China Gansu Tech Innovation Centre for Environmental Geology and Geohazard Prevention Lanzhou 730000China Geological Environment Monitoring Institute of Gansu Province Lanzhou 730050China Institute of Geological Hazards Prevention Gansu Academy of SciencesLanzhou 730000China

The Karakoram Highway(KKH),a part of the China–Pakistan Economic Corridor(CPEC),is a major highway connecting northern Pakistan to *** inventorying and analysis of landslides along KKH are challenging because of poor accessibility,vast study area,limited availability of ground-based datasets,and the complexity of landslide processes in the *** order to preserve life,property,and infrastructure,and to enable the uninterrupted and efficient operation of the KKH,it is essential to strengthen measures for the prevention and control of geological *** the present study,SBASInSAR(Small Baseline Subsets-Interferometric Synthetic Aperture Radar)was used to process 150 scenes of Sentinel 1-A images in the year 2017 along the Karakoram Highway.A total of 762 landslides,including 57 complex landslides,126 rock falls,167 debris slides,and 412 unstable slopes,ranging in size between 0.0017 and 10.63 km2 were ***,this study also gains an inventory of 40 active glacier movements in this *** categorization,displacements characteristics,spatial distribution,and their relationship with various contributing factors have been successfully investigated along the entire KKH using image interpretation and frequency-area *** criteria adopted for landslides categorization is presented in the *** results showed that the 2-D ground deformation derived in Hunza valley echoes well with the general regional landslides *** spatial distribution analysis revealed that there are clumped distributions of landslides in the Gaizi,Tashkurgan,and Khunjerab in China,as well as in Hunza valley,and north of Chilas city in *** results indicated that these landslides mainly occur on south-facing slopes with a slope angle of 20°–45°and elevation relief of 550–2,100 *** development is also related to low vegetation cover and weathering effects in mountain ***,our study provides scientific data

关键词： Landslides mapping Slope deformation Identification Landslide development Area development ratio SBAS-InSAR Karakoram Highway

Deformation of the Zhangjiazhuang high-speed railway tunnel: an analysis of causal mechanisms using geomorphological surveys and D-InSAR monitoring

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Journal of Mountain Science 2021年第7期18卷 1920-1936页

作者： MENG Xing-min QI Tian-jun ZHAO Yan DIJKSTRA Tom SHI Wei LUO Yin-fei WU Yuan-zhao SU xiao-jun ZHAO Fu-meng MA Jin-hui ZHANG Yi CHEN Guan yue dong-xia ZHANG Mao-sheng School of Earth Sciences Lanzhou UniversityLanzhou 730000China College of Earth and Environmental Sciences MOE Key Laboratory of Western China's Environmental SystemsLanzhou UniversityLanzhou 730000China Gansu Tech Innovation Centre for Environmental Geology and Geohazard Prevention Lanzhou 730000China School of Architecture Building and Civil EngineeringLoughborough UniversityLoughboroughLE113TUUK Key Laboratory of Qinghai Environmental Geological Survey Xining 810007China Xi’an Centre of China Geological Survey Xi’an 710054China

On 18 January 2016,the Zhangjiazhuang high-speed railway tunnel in Ledu,Qinghai Province,China,underwent serious deformation and structural damage.A crack formed at the top of the tunnel and the concrete on the crown peeled *** a result,the tunnel could not be operated for three *** order to determine the types and spatial distribution of the landslides in the region and the surface deformation characteristics associated with the tunnel deformation,we used field geological and geomorphological surveys,unmanned aerial vehicle image interpretation and differential interferometric synthetic aperture radar(D-In SAR) surface deformation *** ancient and old landslides were identified and analysed in the study *** deformation monitoring and investigation of buildings in several villages on the slope front showed that the tunnel deformation was not related to deep-seated gravitational slope ***,surface deformation monitoring revealed an active NEE–SWW fault in the area intersecting the tunnel at the location of the tunnel *** constitutes a plausible mechanism for the deformation of the *** study highlights the need for detailed engineering geomorphological investigations to better predict the occurrence of tunnel deformation events in the future.

关键词： Gaojiawan Landslide group Zhangjiazhuang tunnel Deformation Fault activity Irrigation infiltration

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渤海湾盆地南堡凹陷的背形负花状构造

地球科学（中国地质大学学报） 2010年第6期35卷 1029-1034页

作者：刘晓峰董月霞王华中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 中国地质大学资源学院湖北武汉430074 中国石油天然气股份有限公司冀东油田分公司河北唐山063004

花状构造以其独特的构造样式而成为在剖面上识别走滑构造的重要标志.经典的花状构造包括正花状构造和负花状构造.渤海湾盆地南堡凹陷发育一种新型的花状构造——背形负花状构造.在三维地震剖面上,背形负花状构造是由一束向上、向外撒开... 详细信息

花状构造以其独特的构造样式而成为在剖面上识别走滑构造的重要标志.经典的花状构造包括正花状构造和负花状构造.渤海湾盆地南堡凹陷发育一种新型的花状构造——背形负花状构造.在三维地震剖面上,背形负花状构造是由一束向上、向外撒开的大多数为正离距的离散的走滑断层或转换伸展断层所限定的,下部呈"向形",上部呈"背形"的组合样式.平面上,褶皱和相关正断层呈雁行排列.背形负花状构造发育于南堡凹陷转换伸展的构造背景.浅层的"背形"是由转换伸展断层牵引塑性的盖层而形成的一种强制褶皱.该构造经历了牵引背斜形成和背斜脊部断裂-塌落两个发育阶段.背形负花状构造普遍发育于渤海湾盆地的新近系.

关键词：背形负花状构造构造地质沉积作用南堡凹陷.

有效源岩的精确厘定及其排烃量:以南堡凹陷为例

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中南大学学报（自然科学版） 2012年第1期43卷 229-237页

作者：范柏江董月霞庞雄奇中国石油大学油气资源与探测国家重点实验室北京102249 中国石油大学盆地与油藏研究中心北京102249 中国石油冀东油田公司河北唐山063200

有效源岩是指已经进入排烃门限并且品质较好能够排出烃类的源岩。有效源岩的判别分为3步:第1步是对研究区的潜在源岩进行地质统计,确定其平面分布;第2步是利用排烃门限理论判别潜在源岩是否进入排烃门限,只有进入排烃门限后才可能排烃;... 详细信息

有效源岩是指已经进入排烃门限并且品质较好能够排出烃类的源岩。有效源岩的判别分为3步:第1步是对研究区的潜在源岩进行地质统计,确定其平面分布;第2步是利用排烃门限理论判别潜在源岩是否进入排烃门限,只有进入排烃门限后才可能排烃;第3步是对进入排烃门限的潜在源岩进行品质判别,剔除不能排烃的源岩。由此精确厘定有效源岩的分布。基于有效源岩的空间分布,采用生烃潜力法可以准确计算排烃量。对渤海湾盆地南堡凹陷的应用结果表明:对于沙三段、沙一段、东三段有效源岩而言,沙三段有效源岩的规模最大;三套有效源岩的排烃量分别为62.99×108 t,30.65×108 t和22.23×108 t。

关键词：有效源岩排烃量判别与评价

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番茄根际促生菌—假单胞菌的生防作用

华北农学报 2009年第5期24卷 210-213页

作者：岳东霞张要武天津市农业生物技术研究中心天津300192

研究了番茄根际促生菌——假单胞菌在黄瓜根部的定殖能力以及对黄瓜灰霉病和枯萎病的生防作用。结果表明,假单胞菌在浸种和灌根两种情况下均能够定殖在黄瓜根部。拮抗测定表明,一些株系对黄瓜灰霉病菌和黄瓜枯萎病菌有较好的抑制作用,... 详细信息

研究了番茄根际促生菌——假单胞菌在黄瓜根部的定殖能力以及对黄瓜灰霉病和枯萎病的生防作用。结果表明,假单胞菌在浸种和灌根两种情况下均能够定殖在黄瓜根部。拮抗测定表明,一些株系对黄瓜灰霉病菌和黄瓜枯萎病菌有较好的抑制作用,最高抑制率分别达到89.1%和65.6%。离体及盆栽试验表明,CBT1、CBT3、CBT6对黄瓜灰霉病有较好的防治效果,相对防效分别为51.1%～62.4%和44.0%～67.7%;CBT1、CBT6、CBT7对黄瓜枯萎病有一定的防治效果,相对防效分别为55.3%～59.3%和47.7%～55.4%。

关键词：假单胞菌生防作用根际促生菌

南堡凹陷5号构造天然气赋存特征及主力气源分析

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天然气地球科学 2015年第5期26卷 805-812页

作者：刚文哲蒋雅丽高岗董月霞中国石油大学(北京)地球科学学院北京102249 中国石油天然气股份有限公司华北油田采油四厂河北廊坊065000 中国石油天然气股份有限公司冀东油田河北唐山063004

通过地质和地球化学相结合的方法,对南堡5号构造天然气地球化学特征、成因类型分布以及天然气来源进行了精细研究,明确了南堡5号构造天然气的分布特征。南堡5号构造陆上北堡地区天然气主要分布在东营组,滩海地区天然气则主要分布在沙河... 详细信息

通过地质和地球化学相结合的方法,对南堡5号构造天然气地球化学特征、成因类型分布以及天然气来源进行了精细研究,明确了南堡5号构造天然气的分布特征。南堡5号构造陆上北堡地区天然气主要分布在东营组,滩海地区天然气则主要分布在沙河街组。天然气主要为湿气,干气较少,以油溶气为主,凝析气层居次。不同地区的天然气类型不同,陆上北堡地区天然气主要以腐泥型为主,滩海地区天然气主要以腐殖型为主。腐泥型天然气主要分布于东营组,而腐殖型天然气则主要分布于沙河街组。通过地质和地球化学对比分析认为,南堡5号构造滩海地区腐殖型天然气及过渡型天然气主要来源于滩海地区沙三段气源岩,陆上北堡地区腐泥型天然气主要来源于北堡构造沙三段气源岩,即南堡5号构造天然气主力气源来自中深层的沙三段气源岩,以近源运聚为主。

关键词：天然气赋存特征气源分析南堡凹陷

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盐胁迫下根际细菌对杨树生长和生理的影响

河北农业大学学报 2011年第3期34卷 60-64页

作者：岳东霞张要武天津市农业生物技术研究中心天津300192

为了明确根际细菌对杨树耐盐能力的影响,采用盆栽方法研究了不同浓度NaCl胁迫下,根际细菌Bacillussp.和Arthrobacter sp.对杨树生长和生理的影响。结果表明,Bacillus sp.对杨树株高没有明显的影响;在无NaCl或NaCl浓度为85.5 mmol/L时,... 详细信息

为了明确根际细菌对杨树耐盐能力的影响,采用盆栽方法研究了不同浓度NaCl胁迫下,根际细菌Bacillussp.和Arthrobacter sp.对杨树生长和生理的影响。结果表明,Bacillus sp.对杨树株高没有明显的影响;在无NaCl或NaCl浓度为85.5 mmol/L时,显著降低杨树叶片细胞膜透性;在NaCl浓度为119.7 mmol/L时,显著提高杨树叶片叶绿素含量;在85.5和119.7 mmol/L NaCl胁迫下,均显著提高杨树叶片含糖量。Arthrobactersp.在119.7 mmol/L NaCl胁迫下,显著增加杨树株高;在无NaCl或NaCl浓度为85.5 mmol/L时显著降低杨树叶片细胞膜透性,不同浓度NaCl处理,对杨树叶片叶绿素含量均没有明显的作用;在85.5和119.7 mmol/L NaCl胁迫下,均显著提高杨树叶片含糖量。不同水平NaCl胁迫下,Bacillus sp.和Arthrobacter sp.对杨树叶片含水量均没有显著影响。

关键词：杨树盐胁迫根际细菌芽孢杆菌节杆菌