共查询到19条相似文献,搜索用时 109 毫秒
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基于经济效益的成都市土地集约利用评价研究 总被引:1,自引:0,他引:1
在立足供需角度分析影响城市土地集约利用因素的基础上,使用因子分析和聚类分析法对成都近年分区县城市土地集约利用的经济效益进行评价.结果表明,人口规模、经济水平和产业结构成为影响到成都城市土地集约利用的关键因素;成都市区县土地利用集约化程度逐年改善,距离中心城区的空间距离大小直接影响到成都市土地集约利用程度,人口密度是促使土地集约利用的最重要驱力. 相似文献
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采用重庆市主城区2000年和2010年两个时相的TM影像提取城市扩展信息,对影像数据的归一化建筑指数(NDBI)、归一化植被指数(NDVI)和归一化水体指数(NDWI)进行RGB组合增强,再进行决策树分类和减法运算获取研究区扩展信息,发现建筑区面积增加了1.62倍,大部分是由植被区转变而来。其扩张方向受地理影响,南北方向为外延型,东西方向为飞地型。借助统计资料进行精度验证和城市扩展的驱动因素分析发现,区域发展政策、经济增长和人口扩张是主要的影响因素,探讨了对经济增长、城市扩张和人口增长的关系。研究结果表明,以遥感手段监测与研究城市发展变化的趋势是可行和高效的。 相似文献
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《资源开发与市场》2019,(10)
利用合肥市1997年、2001年、2005年、2009年、2013年和2017年遥感数据源,提取相应年份的城市建成区扩展信息,从扩展速度、扩展强度、紧凑度、分形维数、城市建成区扩展弹性指数和空间重心转移等方面对城市空间演化时空特征进行分析,选取14个指标构建主成分模型,结合城市发展背景,研究城市空间演化驱动力机制,同时利用多元回归模型预测合肥市未来建成区面积。结果表明:合肥市城市扩展速度与强度均保持较快增长,城市整体向外部不断扩张,重心向东南方向转移,但城市空间扩张与人口处于不协调的发展模式;经济、人口、交通和政策为城市空间演化主要驱动力;合肥市建成区面积保持较快增长,迅速扩张型城市未来空间扩展模式应以多中心扩展模式为主,进行以轴向发展为主的多中心城市结构的转变,同时注重城市空间的内涵式更新。 相似文献
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以我国31个省份为研究单元,基于2001—2019年城市面板数据,构建城市土地扩张面积指数和扩张强度指数,结合固定效应面板数据模型,从国家和区域尺度分析了我国城市土地扩张时空特征及其影响因素。结果表明:①城市土地扩张面积指数呈持续上升的趋势,而城市土地扩张强度指数呈波动下降的趋势。②东部地区城市土地面积增长最为明显,其次为西部、中部和东北地区;中部地区城市土地扩张强度下降最为明显,其次为西部、东部和东北地区。③城市土地面积扩张最为明显的区域分布在新疆、重庆、云南等省份,年均城市面积增长倍数超过0.2;城市土地强度扩张增长区域分布在北京、广东、辽宁等省份,年均增长超过0.04。④全国尺度上,产业非农化对推动城市土地扩张最为显著;区域尺度上,人口城市化对不同地区城市土地面积扩张影响普遍较强。 相似文献
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一种城市生活垃圾产量预测的改进方法 总被引:6,自引:0,他引:6
将灰色系统理论与多元线性回归分析方法相结合,是研究城市生活垃圾产量预测的一种改进方法。以成都市为例。运用灰色关联度分析确定影响城市生活垃圾产量的4个主要因子:城市非农业人口、气化率、城市人均消费性支出、清扫面积。利用GM(1,1)模型预测上述4个因子的变化情况。建立一个包含这些因子的垃圾产量的多元线性回归分析预测模型,并对2004~2010年的垃圾产量进行预测。该模型预测精度高,实用性强,可为垃圾产量预测提供一种可靠的方法。 相似文献
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吉林省城市建设用地扩张时空特征及驱动因素分析 总被引:2,自引:0,他引:2
城市建设用地扩张是当前我国城市土地利用变化的重要特征。引入扩张速度指数、扩张强度指数,研究2000—2014年吉林省城市建设用地扩张时空特征,运用灰色关联分析法探究其驱动因素。结果表明:(1)研究期内,吉林省城市建设用地扩张时序性、阶段性特征明显,建设用地总量初期平缓扩张—中期快速扩张—后期平缓扩张; 9地市(州)呈现初期"辐射式"扩张、中期"阶梯圈层式"扩张;后期"跳跃式"扩张。(2)3时期9地市(州)城市建设用地扩张地域差异特征显著,中部初期率先扩张、东部中后期显著扩张、西部后期迅速扩张,且地域差异性日趋缩小,趋向均衡稳定的扩张态势。(3)产业结构调整、城镇化发展、人口因素、经济增长是重要驱动因素。 相似文献
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自1993年开始,中国连续18年成为FDI流人量最大的发展中国家,并在地区上呈现出“东多西少”的不平衡现象。自2004年以来,我国FDI逐渐向西部地区转移,相关研究尚不多见。以我国西部地区吸引FDI的主要城市西安市、成都市和重庆市为研究对象,从引资规模、投资质量、产业分布、投资来源地和投资方式五个方面进行比较分析,并运用SPSS软件比较了FDI对当地经济增长、产业结构和城市发展等方面的影响。结论为:①重庆市引资规模最大,西安市利用FDI质量最高;西安市的FDI主要投资于第二产业,重庆市和成都市集中于第三产业;三大城市的投资来源地和方式基本相同。②西安市的FDI对经济的拉动作用和对地区资本形成的影响最大,但溢出效应最小,落后于成都市和重庆市。③FDI对西安市城市规模的促进作用最大,而对成都市的城市化水平提升最显著。 相似文献
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Enjie Li Joanna Endter‐Wada Shujuan Li 《Journal of the American Water Resources Association》2015,51(3):589-613
We characterize and compare water challenges confronting the 28 megacities of the world in 2014. Relying on existing literature and diverse primary data sources, we present a unique portrait at a global scale of the water implications of the rapid growth in megacities. We find that differentiating and analyzing the complexity of megacities' water problems based on geographic contexts, historical development trajectories, urban population growth rates, and forms of urban expansion helps explain the nature of the various water management problems they confront. Two governance features also shed light on megacity water challenges: fragmentation resulting from forms of megacity urban expansion; and, urban dualism resulting from contradictions between historical and cultural legacies and the rise of global engineering and technological norms for water management. The increasing vulnerability of megacities to climate change poses risks as well as opportunities for a more collective response to address this global phenomenon. Our analysis raises important questions and offers guidance about the future trajectories of many more large cities around the world that are on their way to becoming megacities. 相似文献
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William J. Ashton M.B. Bayer 《Journal of the American Water Resources Association》1983,19(5):779-783
ABSTRACT As urban expansion outstrips water supplies, the usual solution is to build pipelines to bring in water from sources farther afield. Such water supplies may act as either a leader of urban development or as a follower. In either case, this engineering approach to the provision of water has fostered less than optimal utilization of regional water and land resources for urban growth. More efficient utilization of these resources is achieved when water supply development and urban growth planning are conjoint activities. Water supply planners and land use planners, working together, are able to generate and evaluate the full range of urban development options, including water demand management through conservation. Preferred regional growth plans are achieved using the best mix of water supply and urban growth. The result is a reduced rate of water supply development and a reduction of urban expansion on prime lands. This partnership approach is demonstrated for the Calgary Region under two levels of water conservation. 相似文献
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综合整治府南河走可持续发展之路 总被引:2,自引:1,他引:1
府南河工程带动成都市城市基础设施建设,产生了巨大 在的社会效益,促进了环境保护及城市生态的良性循环,造就了成都市建设现代化商贸中心的前提条件,为成都市的可持续发展奠定了基础。 相似文献
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Impact of land use and land cover changes on the ambient temperature in a middle scale city, Takamatsu, in Southwest Japan 总被引:1,自引:0,他引:1
Atsuko Nonomura Mutsuko Kitahara Takuro Masuda 《Journal of environmental management》2009,90(11):3297-3304
There is a lack of information on urban heat island impact on the thermal environment due to low populated urban sprawl, although densely populated urban sprawl impact has been identified by several researchers. The Takamatsu area has recently developed in a low populated urban sprawl style without any increase in population. This paper examined the impact of a low populated urban sprawl on the thermal environment through an analysis of the last 30 years data set and investigated the contribution of vegetation fraction and population density to the temperature trend. As a consequence, it was shown that one of the most significant causative factors of temperature increase is an expansion of non-vegetated area even without population growth. This result implied that vegetated zones should be maintained in urban areas in order to realize sustainable urbanization. 相似文献
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在遥感和GIS技术支持下,采用扩展强度指数、紧凑度指数、象限分割方法研究了泰安市建成区1979—2006年的时空扩展变化特征及形态模式。结果表明,泰安市建成区自1979年以来呈现快速扩展趋势,建成区紧凑度指数呈现逐渐下降趋势。对自然和社会经济发展资料分析后认为,泰山对建成区北部的扩展形成天然屏障,而其他方位的快速扩展与泰安市固定资产投资、旅游业发展和人口增长等社会经济发展因素具有密切联系。针对紧凑度指数逐渐下降趋势,提出今后泰安市城市建设应当在城市合理布局的前提下,进一步加强土地的集约利用。 相似文献
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Modeling Change-Pattern-Value Dynamics on Land Use: An Integrated GIS and Artificial Neural Networks Approach 总被引:6,自引:0,他引:6
The use of spatial methods to detect and characterize changes in land use has been attracting increasing attention from researchers.
The objectives of this article were to formulate the dynamics of land use on the temporal and spatial dimensions from the
perspectives of the Change-Pattern-Value (CPV) and driving mechanism, based on multitemporal remote sensing data and socioeconomic
data. The Artificial Neural Networks were used to identify the factors driving changes in land use. The Pearl River Delta
Region of southeast China, which was experiencing rapid economic growth and widespread land conversion, has been selected
as the study region. The results show that from 1985 to 2000 in the study region (1) the most prominent characteristics of
change in land use were the expansion of the urban land at the expense of farmland, forests, and grasslands, (2) the land-use
pattern was being optimized during this period, (3) in an analysis of value, built-up land can yield a return of more than
30 times that of farmland, water area, and forests lands, and (4) rapid economic development, growth in population, and the
development of an infrastructure were major driving factors behind ecological land loss and the nonecological land expansion. 相似文献