The relationship between depth, age and gravity in the oceans   总被引：2，自引：0，他引：2  

A. G. Crosby  D. McKenzie  J. G. Sclater 《Geophysical Journal International》2006,166(2):553-573

  相似文献   

江苏省矿山的主要生态环境问题及治理对策     

徐翠云 《中国地质灾害与防治学报》2006,17(2):160-163

江苏的经济发展较快,对矿产资源的需求量亦大。多年来的无序开采,对生态环境造成很大的破坏和影响,出现了山体植被遭受破坏、土地被占用、环境受污染、诱发地面沉降、地面塌陷等一系列问题,已影响到国民经济的发展。随着省人大和省政府关于限制开山采石和保护环境等政策、法规出台和落实,近几年乱采滥挖现象基本得到了有效的遏制。人们的环保意识得到了加强,不少矿山已逐步开始对环境治理,且初见成效。文章介绍了江苏生态环境现状、存在的主要问题和治理对策,以期引起各级政府和广大民众在对矿产资源开采的同时更要注重环境保护。  相似文献   

Gated communities of the Moscow green belt: newly segregated landscapes and the suburban Russian environment   总被引：3，自引：0，他引：3  

Mikhail Blinnikov  Andrey Shanin  Nikolay Sobolev  Lyudmila Volkova 《GeoJournal》2006,66(1-2):65-81

The transition from the Soviet to the post-Soviet period in and near Moscow manifested itself in increasing production of segregated space both in the urban core and suburban areas outside of the beltway to accommodate the preferences of the new Russian business and governmental elite. This paper focuses on the residential single-family housing inside old and new settlements, which are frequently gated. Approximately 260 of such suburban communities have been developed within 30 km of the beltway during the past few years, of which a majority have some form of exclusion mechanism in place, typically tall solid fences, gates, closed-circuit video surveillance and guarded entry checkpoints. The difference in exclusivity varies from the most exclusive older communities inside Moscow Serebryany Bor enclave and Rublevskoe highway mansions to less exclusive new developments along Novorizkhskoe and Dmitrovskoe highways. Despite high rates of construction, based on sociological surveys in 2003, only about 11% of Russia’s upper class claimed to live in such new “cottages,” with the rest owning condos and luxury apartments in the inner city or older detached homes in villages and small towns. Therefore, not all the needs have been accommodated and more development is certain to take place. The environmental impact of such developments is profound. Based on preliminary LANDSAT image analysis, almost 22% of suburban “green belt” forested land within 30 km zone has been converted to new construction from 1991 to 2001. New construction is now focusing on the remaining fragments of natural vegetation, which will likely lower air quality and water quality available for the city. Ironically, the new developments advertise themselves as “clean and green” with massive investments in unnatural landscaping (seeded lawns, exotic shrubs, river and lake shore “improvements”). This investment highlights the well-known paradox of development in which people move out of town to live near nature, while destroying the wild nature they come to enjoy. “We left city for the weekend It was raining, saw no stars There were fences everywhere Our chiefs behind the bars.” Gennady Shpalikov  相似文献   

Semi-Analytic Modelling of Subsidence   总被引：2，自引：0，他引：2  

Peter A. Fokker  Bogdan Orlic 《Mathematical Geology》2006,38(5):565-589

This paper presents a forward model for subsidence prediction caused by extraction of hydrocarbons. The model uses combinations of analytic solutions to the visco-elastic equations, which approximate the boundary conditions. There are only a few unknown parameters to be estimated, and, consequently, calculations are very fast. The semi-analytic model is applicable to a uniform and layer-cake stratigraphy, with visco-elastic parameters changing per layer, and an arbitrary depletion pattern. By its capabilities to handle a multi-layered visco-elastic subsurface, the semi-analytic model fills the gap between the analytic single-layered elastic models available to date and the more elaborate numerical, e.g. finite element, models.  相似文献   

关于国土资源数据共享分类的思考   总被引：2，自引：0，他引：2  

汪志强 《国土资源信息化》2005,(1):10-13,31

数据共享分类是制定数据共享政策和数据资源开发利用规划的一项基础性工作。本文 提出国土资源数据共享分类的意义、原则和方法,探讨建立以数据共享分类为核心的 国土资源数据分类体系,以期为全面开展国土资源数据共享分类提供参考。  相似文献   

存储区域网技术及其在国土资源行业中的应用     

余前佳 《国土资源信息化》2005,(1):45-48,23

本文简要介绍了存储区域网(SAN)的概念、结构及特点,对SAN与DAS、NAS存 储模式在性能、可用性等方面做了比较,并结合具体建设案例,指出了国土资源行业 存储系统建设采用SAN结构的优势。  相似文献   

土地利用更新调查需要注意的几个问题     

段玉清  胡雪松  宋小虎  张叶春 《现代测绘》2005,28(4):43-44

以土地利用更新调查生产中的体会．从工作前期准备、技术路线、正射影像图制作、权属界线调查几种特殊情况和表示方法的处理，提出了土地利用更新调查需要注意的几个问题和建议。  相似文献   

蒙脱石脱水作用与地面沉降关系的研究展望   总被引：7，自引：0，他引：7  

杨献忠杨祝良  陈敬中胡存礼袁平  魏乃颐 《岩石矿物学杂志》2005,24(6):659-665

粘土矿物在地面沉降中的作用、粘土矿物的脱水作用对地面沉降的影响等日益成为评价和防治地质、工程、水文、环境等问题的关键,也一直是相关领域的研究难题而逐渐引起高度重视。本文回顾了蒙脱石层间水性质、层间水化膨胀和脱水收缩的影响因素,提出蒙脱石层间的固溶体特征,在总结蒙脱石脱水作用与地面沉降关系研究成果的基础上,提出了用蒙脱石脱水作用研究地面沉降的思路。最后讨论了用蒙脱石的脱水作用研究地面滞后沉降及沉降趋势预测的可能性。  相似文献   

南海西南部曾母盆地早中新世以来沉降史分析   总被引：2，自引：2，他引：2       下载免费PDF全文

吴庐山 邱 燕解习农  刘晓峰江 涛 《中国地质》2005,32(3):370-377

采用回剥法和局部均衡模式研究曾母盆地早中新世以来的沉降史，并探讨了该盆地构造演化特征。曾母盆地自早中新世以来经历了17．5-11．6Ma、11．6-5．5Ma、5．5-3．0Ma和3．0-0Ma的4次快速沉降作用，其构造演化受控于曾母地块与南沙地块及婆罗洲地块的碰撞和盆地两侧的万安-卢帕尔断裂与廷贾走滑断裂的综合作用，可划分为南北双向挤压（晚始新世-早中新世）、走滑改造（中中新世-晚中新世）和区域沉降（上新世-第四纪）3个演化阶段。  相似文献   

人工神经网络在天津市区地面沉降预测中的应用   总被引：8，自引：1，他引：8  

李涛  潘云  娄华君  李波  王宏  邹立芝 《地质通报》2005,24(7):677-681

在分析天津市区地面沉降特点的基础上，结合人工神经网络原理，选择1961-1980年的天津市区降水量、地下水开采量、前年沉降量、固结度作为训练样本的输入量，以这20年的地面沉降量作为输出量，用贝叶斯正则化算法训练BP网络，得到沉降的仿真模型。并把1981-1993年的资料用来进行预测检验，结果表明这是一种比较理想的地面沉降预测方法。最后在不同的降水量保证率下，预测了到2010年天津市区地面沉降的情况。  相似文献