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Mapping rice-fallow cropland areas for short-season grain legumes intensification in south Asia using MODIs 250 m time-series data

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International Journal of Digital Earth 2016年第10期9卷 981-1003页

作者： Murali Krishna Gumma Prasad s.Thenkabail Pardharsadhi Teluguntla Mahesh N.Rao Irshad A.Mohammed Anthony M.Whitbread International Crops Research Institute for the semi-Arid Tropics PatancheruIndia u.s.Geological survey(usGs) Western Geographic Science CenterFlagstaffAZUSA Humboldt state university ArcataCAUSA

The goal of this study was to map rainfed and irrigated rice-fallow cropland areas across south Asia,using MODIs 250 m time-series data and identify where the farming system may be intensified by the inclusion of a short-season crop during the fallow ***-fallow cropland areas are those areas where rice is grown during the kharif growing season(June–October),followed by a fallow during the rabi season(November–February).These cropland areas are not suitable for growing rabi-season rice due to their high water needs,but are suitable for a short-season(≤3 months),low water-consuming grain legumes such as chickpea(Cicer arietinum L.),black gram,green gram,and ***(double-cropping)in this manner can improve smallholder farmer’s incomes and soil health via rich nitrogen-fixation legume crops as well as address food security challenges of ballooning populations without having to expand *** grain legumes,primarily chickpea,are increasingly grown across Asia as a source of income for smallholder farmers and at the same time providing rich and cheap source of protein that can improve the nutritional quality of diets in the *** suitability of rainfed and irrigated rice-fallow croplands for grain legume cultivation across south Asia were defined by these identifiers:(a)rice crop is grown during the primary(kharif)crop growing season or during the north-west monsoon season(June–October);(b)same croplands are left fallow during the second(rabi)season or during the south-east monsoon season(November–February);and(c)ability to support low water-consuming,short-growing season(≤3 months)grain legumes(chickpea,black gram,green gram,and lentils)during rabi *** irrigated or rainfed crops such as rice or wheat that were grown during kharif were not considered suitable for growing during the rabi season,because the moisture/water demand of these crops is too *** study established cropland classes based on the every 16-day 25

关键词： Croplands cropland fallow seasonal rice mapping rice-fallow intensification kharif rabi remote sensing double-cropping MODIs 250 m NDVI spectral matching techniques ground survey data grain legumes potential cropland areas south Asia

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Neoproterozoic tectonic geography of the south-east Congo Craton in Zambia as deduced from the age and composition of detrital zircons

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Geoscience Frontiers 2019年第6期10卷 2045-2061页

作者： Brandon L.Alessio Alan s.Collins Peter siegfried stijn Glorie Bert De Waele Justin Payne Donnelly B.Archibald Centre for Tectonics Resources and Exploration(TRaX)Dept of Earth SciencesThe University of AdelaideAdelaideSouth Australia 5005Australia GeoAfrica Prospecting services cc ErosNamibia sRK Consulting 1/10 Richardson StWest PerthWestern Australia 6005Australia Curtin university of Technology Kent StBentleyWestern Australia 6102Australia Centre for Tectonics Resources and Exploration(TRaX)School of Built and Natural EnvironmentsUniversity of South AustraliaAdelaideSouth Australia 5000Australia st.Francis Xavier university Physical Sciences Complex5009 Chapel SquareAntigonishNova Scotia B2G 2W5Canada

The southern Irumide Belt(sIB)is an orogenic belt consisting of a number of lithologically varied Mesoproterozoic and Neoproterozoic terranes that were thrust upon each *** belt lies along the southwest margin of the Archaean to Proterozoic Congo Craton,and bears a Neoproterozoic tectonothermal overprint relating to the Neoproterozoic-Cambrian collision between the Congo and Kalahari *** preserves a record of about 500 million years of plate interaction along this part of the Congo *** zircon samples from the sIB were analysed for u-Pb and Lu-Hf isotopes,as well as trace element *** data are used to constrain sediment-source relationships between sIB terranes and other Gondwanan terranes such as the local Congo Craton and Irumide belt and wider afield to Madagascar(Azania)and *** correlations are then used to interpret the Mesoproterozoic to Neoproterozoic affinity of the rocks and evolution of the *** zircon samples from the Chewore-Rufunsa and Kacholola(previously referred to as Luangwa-Nyimba)terranes of the sIB yield zircon u-Pb age populations and evolvedε(Hf)(t)values that are similar to the Muva supergroup found throughout eastern Zambia,primarily correlating with ubendian-usagaran(ca.2.05-1.80 Ga)phase magmatism and a cryptic basement terrane that has been suggested to underlie the Bangweulu Block and Irumide *** data suggest that the sIB was depositionally connected to the Congo Craton throughout the *** more eastern Nyimba-sinda terrane of the sIB(previously referred to as Petauke-sinda terrane)records detrital zircon ages andε(Hf)(t)values that correlate with ca.1.1-1.0 Ga magmatism exposed elsewhere in the sIB and Irumide *** ascribe this difference in age populations to the polyphase development of the province,where the sedimentary and volcanic rocks of the Nyimba-sinda terrane accumulated in extensional basins that developed in the *** deposition wou

关键词： Detrital zircon geochronology Tectonics Hafnium isotopes Zambia southern irumide belt Irumide belt

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Improving social media use for disaster resilience: challenges and strategies

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International Journal of Digital Earth 2023年第1期16卷 3023-3044页

作者： Nina s.N.Lam Michelle Meyer Margaret Reams seungwon Yang Kisung Lee Lei Zou Volodymyr Mihunov Kejin Wang Ryan Kirby Heng Cai department of Environmental sciences Louisiana State UniversityBaton RougeUSA Landscape Architecture and urban Planning Texas A&M UniversityCollege StationUSA school of Information studies Center for Computation and TechnologyLouisiana State UniversityBaton RougeUSA Division of Computer science and Engineering Louisiana State UniversityBaton RougeUSA department of geography Texas A&M UniversityCollege StationUSA Escambia County Natural Resources Management PensacolaFloridaUSA

This paper develops a social media-disaster resilience analysis framework by categorizing types of social media use and their challenges to better understand and assess its role in disaster resilience research and *** framework is derived primarily from several case studies of Twitter use in three hurricane events in the united states-Hurricanes Isaac,sandy,and *** paper first outlines four major contributions of social media data for disaster resilience research and management,which include serving as an effective communication platform,providing ground truth information for emergency response and rescue operations,providing information on people's sentiments,and allowing predictive ***,there are four_key challenges to its uses,which include,easy spreading of false information,social and geographical disparities of Twitter use,technical issues on processing and analyzing big and noisy data,especially on improving the locational accuracy of the tweets,and algorithm bias in Al and other types of ***,the paper proposes twenty strategies that the four sectors of the social media community-organizations,individuals,social media companies,and researchers-could take to improve social media use to increase disaster resilience.

关键词： Twitter use challenges and strategies disaster resilience social and geographical disparities emergency rescue Hurricane Isaac Hurricane sandy Hurricane Harvey

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世界上最自由的监狱像浴缸一样漂浮在大西洋上

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环球人文地理 2021年第15期 94-101页

作者： sue simon Benjamin Ballande ATOMIYME cracotte 17 Betty_l0u

从法国西部海岸向外延伸,一望无际的大西洋上,漂浮着一座像浴缸一样的椭圆形建筑,距今已有两百年多年历史。它被誉为世界上最自由的监狱,在世界十大监狱排名中,始终占据一席之地。如今,这座监狱早已结束它的使命,以另一种方式吸引着人...

从法国西部海岸向外延伸,一望无际的大西洋上,漂浮着一座像浴缸一样的椭圆形建筑,距今已有两百年多年历史。它被誉为世界上最自由的监狱,在世界十大监狱排名中,始终占据一席之地。如今,这座监狱早已结束它的使命,以另一种方式吸引着人们前往探索。

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水管理对干旱区盐渍化与土地退化中和的影响

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science Bulletin 2023年第24期68卷 3240-3251,M0006页

作者：施海洋罗格平 Edwin H.sutanudjaja Olaf Hellwich 陈曦丁建丽吴世新何秀凤陈春波 Friday u.Ochege 王渊刚凌青艾里西尔·库尔班 Philippe De Maeyer Tim Van de Voorde state Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Research Centre for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi 830011China department of geography Ghent UniversityGhent 9000Belgium College of Resources and Environment sciences Xinjiang UniversityUrumqi 830046China department of Physical geography Utrecht UniversityUtrecht 3584Netherlands department of Computer Vision&Remote sensing Technical University of BerlinBerlin 10587Germany sino-Belgian Joint Laboratory of Geo-Information Ghent 9000Belgium school of Earth sciences and Engineering Hohai UniversityNanjing 211100China department of geography and Environmental Management University of Port HarcourtPort Harcourt 500004Nigeria

通过优化灌溉和水资源管理以减少耕地土壤盐渍化对实现土地退化中和至关重要.各种灌溉和水资源管理措施对流域尺度盐渍化的缓解作用的有效性和可持续性尚不明确.本研究利用遥感技术估算了1984-2021年干旱区耕地的表层土壤盐度.然后,利... 详细信息

通过优化灌溉和水资源管理以减少耕地土壤盐渍化对实现土地退化中和至关重要.各种灌溉和水资源管理措施对流域尺度盐渍化的缓解作用的有效性和可持续性尚不明确.本研究利用遥感技术估算了1984-2021年干旱区耕地的表层土壤盐度.然后,利用贝叶斯网络分析比较了十个大型干旱区流域(尼罗河、底格里斯-幼发拉底河、印度河、塔里木河、阿姆河、伊犁河、锡尔河、准格尔盆地、科罗拉多河和圣华金河流域)的土壤表层盐度对水资源管理(如各种灌溉和排水方式)的时空响应.在开发水平较高的流域,管理者采用滴灌和地下水灌溉,通过降低地下水水位有效地控制了土壤盐度.对于仍采用传统漫灌的流域,经济发展和政策支持对于建立“改善灌溉系统——降低盐度——增加农业收入”的良性循环至关重要.这也是实现土地退化中和目标的关键.

关键词： soil salinization Land degradation neutralization Irrigation Water management Bayesian networks Drylands

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基于模式识别的景观格局分析与尺度转换研究框架

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生态学报 2006年第3期26卷 663-670页

作者：陈利顶吕一河傅伯杰卫伟中国科学院生态环境研究中心北京100085

景观格局分析和尺度转换是生态学和地理学研究的核心问题之一。尽管多年来投入了大量的精力,然而由于尺度效应的复杂性和尺度转换过程的不确定性,仍然没有找到合适的方法。目前关于尺度转换的研究存在两个误区,其一是过分重视空间尺度... 详细信息

景观格局分析和尺度转换是生态学和地理学研究的核心问题之一。尽管多年来投入了大量的精力,然而由于尺度效应的复杂性和尺度转换过程的不确定性,仍然没有找到合适的方法。目前关于尺度转换的研究存在两个误区,其一是过分重视空间尺度的转换,忽略了过程尺度的转换;其二是过分强调了对不同尺度间数量关系的外推与转换,忽略了不同尺度间生态规律的外推与转换。在系统分析了景观格局与尺度转换研究现状、存在问题和难点的基础上,提出了借用模式识别的原理和方法,针对特定的生态过程,开展景观格局分析与尺度转换的思路。认为尺度转换的关键在于通过识别不同尺度上影响生态过程的主导因子,找到各个尺度上“格局(环境因子空间组合)-过程”、尺度间“格局-格局”之间的对应关系,通过建立“环境-格局-过程”模式识别数据库,就能够建立不同尺度之间基于模式识别的尺度转换方法。

关键词：景观格局分析生态过程模式识别尺度转换

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中国琼雷地区玻璃陨石成份的初步研究

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核技术 1984年第3期 21-22页

作者：许汉卿胡国辉钟红海凌育远陈华堂广东省测试分析研究所广州地理研究所

本文通过14MeV中子和热中子活化分析技术,研究了中国琼雷玻璃陨石中的Al、Ba、Ce、Co、Cr、Cs、Eu、Fe、Gd、Hf、La、Mg、Na、O、Rb、sb、sc、si、sm、Ta、Tb、Th、u、Yb等24种元素的含量（共12个样品）。并讨论了它的归属,主要氧化物与... 详细信息

本文通过14MeV中子和热中子活化分析技术,研究了中国琼雷玻璃陨石中的Al、Ba、Ce、Co、Cr、Cs、Eu、Fe、Gd、Hf、La、Mg、Na、O、Rb、sb、sc、si、sm、Ta、Tb、Th、u、Yb等24种元素的含量（共12个样品）。并讨论了它的归属,主要氧化物与siO2的相关性、稀土元素相对丰度分布模式和Th/u的比值等以及与其演化史和成因的关系。

关键词：玻璃陨石

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Geomechanical response of overburden caused by CO_2 injection into a depleted oil reservoir

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Journal of Rock Mechanics and Geotechnical Engineering 2016年第6期8卷 860-872页

作者： Hema J.siriwardane Raj K.Gondle sai B.Varre Grant s.Bromhal Thomas H.Wilson department of Civil and Environmental Engineering West Virginia University department of Civil and Environmental Engineering University of Massachusetts Lowell National Energy Technology Laboratory U.S. Department of Energy department of Geology and geography West Virginia University

This study investigates the hydro-mechanical aspects of carbon dioxide(CO2) injection into a depleted oil reservoir through the use of coupled multiphase fluid flow and geomechanical *** singlephase and multiphase fluid flow analyses coupled with geomechanics were carried out at the West Pearl Queen depleted oil reservoir site,and modeling results were compared with available measured *** site geology and the material properties determined on the basis of available geophysical data were used in the *** results from the coupled multiphase fluid flow and geomechanical analyses show that computed fluid pressures match well with available measured *** hydromechanical properties of the reservoir have a significant influence on computed fluid pressures and surface ***,an accurate geologic characterization of the sequestration site and determination of engineering properties are important issues for the reliability of model *** computed fluid pressure response is also significantly influenced by the relative permeability curves used in multiphase fluid flow *** the multiphase fluid flow models provide more accurate fluid pressure response,single-phase fluid flow models can be used to obtain approximate *** ground surface deformations obtained from single-phase fluid flow models coupled with geomechanics are slightly lower than those predicted by multiphase fluid flow models coupled with ***,the advantage of a single-phase model is the *** field monitoring of subsurface fluid pressure and ground surface deformations during fluid injection can be used in calibrating coupled fluid flow and geomechanical *** calibrated models can be used for investigating the performance of large-scale CO2storage in depleted oil reservoirs.

关键词： Depleted oil reservoirs Multiphase flow Geomechanics Geologic sequestration Computational modeling

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哈尔滨中央大街充满欧洲风情的“亚洲第一街”

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环球人文地理 2021年第3期 34-41页

作者：水星哈尔滨独狼耿洪杰少年煜鎛摄影师小叶u

提起哈尔滨,人们脑海中都会浮现"北国风光,万里雪飘"的场景。实际上,作为黑龙江的省会,哈尔滨不仅坐拥壮观的雪国美景,还具有独特的人文气息,中央大街便是最好的证明。"没到过中央大街,就不能说来过哈尔滨。"一百多年来,哈尔滨中央大街... 详细信息

提起哈尔滨,人们脑海中都会浮现"北国风光,万里雪飘"的场景。实际上,作为黑龙江的省会,哈尔滨不仅坐拥壮观的雪国美景,还具有独特的人文气息,中央大街便是最好的证明。"没到过中央大街,就不能说来过哈尔滨。"一百多年来,哈尔滨中央大街不仅是一条历史老街、建筑艺术博览群,更是一条繁华热闹的商业步行街,充满了北国浓厚的生活气息。历久弥新的岁月传奇、积淀深厚的文化底蕴、独具气质的欧式风情、流光溢彩的梦幻夜景……这些元素构建了中央大街唯美浪漫、高贵典雅、时尚繁华的形象,更是哈尔滨人永远迷恋的情结。

关键词：徽州竹编澄心堂纸新安画派手上功夫

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广州市中山大道BRT主干道的联动分析

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热带地理 2010年第2期30卷 156-161页

作者：李文翎周俊滔黄竞吕拉昌广州大学地理科学学院广州510006 广州发展研究院广州510405

为探索BRT方案在高密度开发地区实施的可行性及其运行效益,采用实地调查与案例分析的方法,以广州中山大道BRT干道的设计为例,结合中山大道现有交通组织特点,指出BRT建设可能对其交叉路口交通组织、周边线路的联动和车辆过量占道等方面... 详细信息

为探索BRT方案在高密度开发地区实施的可行性及其运行效益,采用实地调查与案例分析的方法,以广州中山大道BRT干道的设计为例,结合中山大道现有交通组织特点,指出BRT建设可能对其交叉路口交通组织、周边线路的联动和车辆过量占道等方面造成影响,认为实现"人地车"的协调才是城市交通规划的关键;提出促成交叉口BRT优先通行技术和ITs(智能交通系统)技术的应用、进一步优化运营模式、适当限制私人交通、合理规划公交地铁的驳接和大力发展快速公交并构建快速公交网络系统等措施。

关键词：快速公交(BRT) 中山大道联动分析

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