GIS支持下山区县域农村居民点分布特征研究——以栖霞市为例   总被引：19，自引：0，他引：19  

李云强  齐伟  王丹  闫勇  路超  王娜娜  秦天天 《地理与地理信息科学》2011,27(3):73-77

运用GIS空间分析技术、景观指数法和Voronoi图Cv值相结合的分析方法,研究了胶东山区栖霞市农村居民点的空间均匀性特征,并探讨了农村居民点在地形梯度上的分布特征。结果表明:全市农村居民点分布的Cv值为58.84%,空间分布表现为随机分布;唐家泊镇、松山镇、臧家庄镇和翠屏街道4个乡镇的农村居民点呈集群分布,其他乡镇为随机分布;农村居民点分布的优势区间在1~3地形位,随着地形位的增大农村居民点的优势度降低;农村居民点的面积、斑块数目和平均斑块面积随地形位的增大而减少,平均斑块形状指数和平均斑块分维数随地形位的增大而增大;同时,公路是影响山区农村居民点空间布局的重要因素。研究反映了栖霞市农村居民居住习惯的差异,为农村居民点的整治和规划提供了依据。  相似文献   

云南金平亚拉寨镍矿矿石组份及其综合利用     

朱启金 《云南地质》2011,30(3):289-293

亚拉寨镍矿属岩浆熔离型与晚期岩浆结晶分异型复合的硫化物矿床。矿体赋存于基性～超基性杂岩体底部,有用元素镍平均0.44ω%,伴生铜、钴等。对矿石组份及其赋存状态研究后,提出综合利用建议。  相似文献   

TBM掘进技术发展及有关工程地质问题分析和对策   总被引：12，自引：1，他引：11  

尹俊涛  尚彦军  傅冰骏  曲永新 《工程地质学报》2005,13(3):389-397

通过对大量文献资料和工程实例的研究,论述了TBM(隧道掘进机)近半个世纪发展及其在隧道建设中的应用现状和问题。对大量国内外工程实例分析后发现优先采用TBM掘进技术已成为未来隧道建设总的发展趋势。从岩石力学和工程地质角度对岩石TBM掘进过程中遇到的诸如软岩大变形、突水、岩爆等不良工程地质问题导致卡机或管片变形、破损等工程事故进行了剖析,并对采用的工程处理措施作了总结对比。随着今后TBM掘进技术在我国大规模应用,对复杂工程地质条件的客观全面认识和施工方案的及时调整成为影响施工安全和经济效益的关键因素。  相似文献   

数字县域地理空间框架建设初探     

梁志华  康勇卫 《测绘与空间地理信息》2016,(7):113-115

对数字县域地理空间框架建设的背景、必要性、建设内容进行了较为详细的论述。结合实际案例,介绍了某县的建设成果,并论述了在数字县域地理空间框架建设过程中遇到的问题及对策。文章最后总结数字县域地理空间框架建设的多重效益,并展望了未来发展方向。  相似文献   

Environmental concerns of poor households in low-income cities: the case of the Tamale Metropolis,Ghana     

Issaka Kanton Osumanu 《GeoJournal》2007,68(4):343-355

The Tamale Metropolitan Area (TMA), as a low-income city in a heavily indebted poor country, is at the first stage of the urban environmental transition where most of the environmental problems tend to occur close to the home. Some of the more severe household environmental problems are poor housing, inadequate potable water supply, unsanitary conditions, uncollected garbage, indoor air pollution and pest infestation. Those usually exposed to these environmental burdens are the less wealthy households who have benefited less from development planning and infrastructure provision. Using questionnaire survey and focus group discussions, this study explored the environmental anxieties of households in the metropolis. A stratified sample of residential areas of the city was employed, and the study is able to examine city-wide disparities. The results indicate that problems of water supply are the concern of all groups. Sanitation and garbage disposal services are problems faced mainly by the poor in low-income areas. Other problems faced by the poor are overcrowding, indoor air pollution and pest infestation, but these problems are not highlighted by the poor reflecting a misplaced lack of concern for these problem areas and ignorance of the health risks posed by these hazards. The finding suggests a considerable demand for improvements in environmental service provision and a general willingness to pay for such improvements.

Issaka Kanton OsumanuEmail:

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Analysis of equivalent-dose distributions for single grains of quartz from modern deposits   总被引：1，自引：0，他引：1  

M. Ballarini  J. Wallinga  A.G. Wintle  A.J.J. Bos 《Quaternary Geochronology》2007,2(1-4):77-82

Two modern coastal sands are studied through single-grain optical dating techniques. The first sample is estimated to be less than 10 y old by means of independent age control and is known to be well-bleached on the basis of preliminary single-aliquot studies. The second sample is less than 1 y old, but an age of 73±24 years had been determined through single-aliquot analysis. For both samples we compare equivalent doses obtained from single-grain analysis to those obtained by means of similar single-aliquot methods. We found that results are comparable although equivalent doses determined through single-aliquot methods are more precise. The reason for this may be ascribed to the limited number of grains on which single-grain measurements were carried out. The presence of poorly bleached grains within a sample could be identified by dose distribution analysis of individual grains.  相似文献   

牟定大湾山磁铁矿成矿规律   总被引：1，自引：0，他引：1  

李石英 《云南地质》2014,(1):85-90

牟定安益地区元古界变质岩地层出露广泛,“大湾山式”贫磁铁矿产于元古界龙川群路古模组第三段浅变质含磁铁绿片岩中,地面高精度磁测异常与含矿地层吻合较好,矿床类型属中基性火山—沉积变质型贫磁铁矿.经多年工作,该类矿床规模已达中—大型,区内具有较好的找矿前景.  相似文献   

山东省一体化“多测合一”信息服务平台技术设计与实现          下载免费PDF全文

梁敏  孙志强  路静  杨仕勇 《山东国土资源》2023,39(8)

为实现工程建设项目“多测合一”改革关于测绘服务的全业务全流程全生命周期信息化管理，在充分调研全省“多测合一”改革现状和信息化需求的基础上，采用先进的微服务、云计算、云容器、GIS等技术，开发了山东省一体化“多测合一”信息服务平台，介绍了平台关键技术，设计了平台业务流程和技术架构，对平台管理、业务功能、成果管理、共享和应用进行了设计与实现，提升了全省“多测合一”改革测绘服务信息化管理水平。  相似文献