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Designandcompilationofurbangeomorphologicalmaps———AcasestudyinChongqingcityiaoChengtai,ZhangYougangDepartmentofUrbanScience,...  相似文献   

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Inthelatetenyears,inChina,withthelandpayingusinginstitutiongoingon,manycitieshavesetthecitylandbasepriceonthebasisofTheoperat...  相似文献   

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With the rapid urbanization, land banking has become an important means for rational land use and land configuration optimizing. Rational urban land reserve and supply plan are keys for an urban land banking. GIS has been used to model urban growth, growth at the rural-urban fringe specifically. This paper identifies that the urban land banking potential can be evaluated based on RS and GIS technology. 10 indicators were chosen in the integrated index system. As a case of Metropolitan area in Chongqing, urban land banking potential was evaluated based on RS and GIS technology. With GIS, two steps can help to finish potential analysis of land banking. One is goal driven process, such as the process of planning and definition; the other step is data-driven process, such as the process of Manipulating. The results are used to establish the current land banking plan.  相似文献   

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Numericalevaluationontheinterspecificrelation-shipintheD.furfuraceagroupofneotropicalAn-nonaceaeHeping(DeptartmentofLifeScien...  相似文献   

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The Zhongba site has been demonstrated to be a location of salt production based on multi-disciplinary research including salt archaeology,environmental archaeology,zooarchaeology,paleobotany,and other natural science examinations.The continuity of salt production from the Han Dynasty to the present day as understood primarily from ancient texts can now be traced back to even earlier times. Based on the characteristics of cultural layer deposits,features,and artifacts,Zhongba can be clearly distinguished from known settlements,and from bronze,iron,pottery and porcelain workshops.According to various natural science examinations,the major impurities in local salt brine are also found in floor features,brine troughs,and rounded bottom pots at the site even though NaCl itself was not preserved.These traces were left over from the salt production process rather than being naturally deposited.Zhongba and its constituent features and artifacts share many common characters with other salt production sites around the world.Consequently,the Zhongba site can be confidently identified as a salt production site where activity continued for several thousand years.The formation of the site cannot be separated from salt production,and it is also highly related to its natural environment.  相似文献   

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A 1.5 Ma sporopollen record was obtained from a continuous loess-paleosol sequence at Chaona in the central Chinese Loess Plateau. It shows that (1) arid herbs of largely Artemisia and Chenopodiaceae and arbors of mainly Pinus, Betula and Quercus dominate loess and paleosol, respectively, reflecting cycles of cold-dry and warm-humid conditions of glaciation and interglaciation; (2) that similar vegetation pattern and cold-dry condition were found in times of unusual thick and coarse loesses L9 and L15, which have been regarded as two extremely cold and dry times as indicated by inorganic climatic proxies; and (3) that shifts of vegetations from earlier forest-steppe to open-forest and steppe and then to steppe were found at 0.95 and 0.5 Ma,implying a stepwise of drying of the Loess Plateau in the Quaternary.  相似文献   

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ThesustainabledevelopmentofthemountainousregioninChongqingThreGorgesReservoirregionZhangAnming,XuMaoqiDepartmentofUrbanScie...  相似文献   

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Kunming is a famous tourist city,has a good natural environment.The good natural environment should be protected,by analyzing the environment of Kunming's climate,atmospheric,water,noise,solid wastes and urban afforestation,pointing the direction of improving natural environment.  相似文献   

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城市地貌环境的脆弱性研究   总被引:2,自引:1,他引:2  
城市地貌环境具有两大地域系统和三类地貌单元。由于城市中人类活动产生的反馈效应日益强化,城市地貌环境具有明显的脆弱性,表现为:环境变异敏感度高,环境的持续利用性降低和环境对灾变的承受弹性较小。  相似文献   

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运用分形理论中的边界维数对重庆市近30年的城市空间结构形态变化进行定量分析,揭示重庆市不同时期的城市地域扩展方式.结果显示,重庆市主城区各区在各个时期城市形态具有差异,整体上重庆市城市建成区在30年间的发展使得图形破碎度降低,其中1980~1997年为城市地域的快速发展期1,997~2001年为高速波动发展期,2001~2010年为高速发展并有趋于稳定趋势发展期.  相似文献   

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党的十七大提出的构建"和谐社区",是建设和谐社会的重要标准之一。永川作为重庆渝西建设和谐社区的一个示范城市,已在居民自治建设问题上进行了积极的探索。从永川区社区建设的现状出发,通过问卷调查和走访调查,找出了存在的相关问题,并针对问题进行了原因分析,提出了改进的措施。  相似文献   

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传统的以行政管制为主的行政管理模式已不适应日益复杂的城市道路交通管理,以多主体参与为主的公共治理是有效实施交通管理的途径.  相似文献   

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传统的以行政管制为主的行政管理模式已不适应日益复杂的城市道路交通管理,以多主体参与为主的公共治理是有效实施交通管理的途径.  相似文献   

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王伟  栾进华  黄波 《中国西部科技》2011,10(1):13-14,10
利用本次调查所得土壤分析数据,研究了重庆奉节地区表层土壤中元素含量分布特征,大体可分为均匀分布型、弱分异型和分异型,并归纳出土壤元素含量和分布受地质背景和人类活动的双重控制。重点对重金属Cu、Zn、Ni、Hg、Pb、Cr、Cd以及类金属As进行分析和测定,并对土壤中重金属污染进行了初步环境质量评价,发现调查区基本无重金属污染,土壤质量达到自然背景水平,是适合脐橙种植的重点地区。  相似文献   

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本文从研究重庆市投资环境的必要性分析了影响重庆市投资环境的因素,并就某些劣势环境提出了几点改善建议.  相似文献   

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城乡统筹发展背景下重庆市生态环境现状评价   总被引:2,自引:0,他引:2  
本文构建了城乡统筹发展视角下的重庆市生态环境评价指标体系,并利用时序主成分分析法对重庆市生态环境系统行为在1998-2008这11年间的演变进行了实证评价研究.结果表明:1)城乡背景下重庆市生态环境整体水平在此11年间呈持续良性发展趋势,但变化速率有起伏改变;2)系统演变的协调度较差,在这期间呈"双峰态"变化,演变峰值...  相似文献   

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重庆市都市区近些年来的经济高速发展和水土资源的高强度开发,引发了一系列资源环境问题.本文针对其主要生态环境问题,在分析其原因的基础上,提出以下整治整合对策:优化工业结构与空间布局;推行企业绿色化战略和清洁生产;加大环保投入,加强重点环保基础设施建设;综合决策,做出完善的城市环境规划;完善生态环保观测站点,建立都市区生态环境信息处理及预警系统,对都市区实施生态系统管理;加强法律建设,健全法规,严格执法.  相似文献   

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民营经济税收环境的完善是其可持续发展的重要保障。本文从税收政策角度,探讨"新36条"出台后,如何破除重庆市民营经济发展中存在的玻璃门、弹簧门现象,推进自主创新,解决转型升级的税收发展环境问题,从而促进重庆市民营经济的健康持续发展。  相似文献   

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