浅析大同市区地下水开采与环境地质问题

大同市平原区地下水历年严重超采 ,造成了地下水持续大面积大幅度下降 ,从而形成了总面积 93 .6km2 的 4个地下水降落漏斗 ,最大漏斗区中心水位下降达 30m ,随之引发了大面积地面沉降 ,地裂缝出现并不断发展 ,总长度达 18.8km。另外 ,由于废污水的排放、引污灌溉、工业生活废渣的堆积 ,造成地下水质污染 ,使得水环境地质状况进一步恶化     

Google Earth在水利水电工程建设征地移民中的应用

遥感技术在水利水电工程建设征地移民中得到了广泛的应用.Google Earth软件具有简单、开放、便捷、高效等优势,本文立足水利水电工程征地移民的实际需要,探讨Google Earth在征地移民规划设计工作中直观和动态展示设计成果的应用方法、实践和过程.结合山口岩水利枢纽工程利用Google Earth制作的项目区卫星影像图、库区淹没示意图、水库淹没3d模型图、淹没区飞行动画视频等成果,应用效果良好.     

基于GRACE重力数据反演黄河流域陆地水储量变化

基于GRACE重力卫星数据反演黄河流域2002-2013年陆地水储量变化,并通过GLDAS验证GRACE反演结果。在此基础上采用皮尔逊相关系数法进一步探究陆地水储量与降水、气温、蒸散和植被NDVI的关系。结果表明:基于GRACE数据能够较好地反演陆地水储量; 2002-2013年间黄河流域的水储量以0.56 cm/a的速度减少,且具有明显的季节特征,水储量在1-6月呈亏损状态,7-12月呈盈余状态;对黄河流域水储量变化与降水、气温、蒸散和NDVI进行滞后性分析,表明其与降水、蒸散、NDVI有两个月的滞后效应,与气温为3个月。     

我国保护土地资源的刑事立法研究

随着我国经济的飞速发展,土地升值,由此引发了形形色色土地违法犯罪案件,严重影响了我国经济健康、有序的发展。笔者从现阶段我国土地违法犯罪案件的特征着手,通过对现行刑法保护土地资源现状的分析,指出其中存在的问题,进而提出防范土地犯罪的相应法律对策。     

基于遥感的土地整理评价可行性研究

土地整理是以提高土地资源有效利用率为目的,实现国土资源集约利用的主要手段,运用遥感技术对土地整理项目进行评价,是科学化管理土地整理项目和进一步规范土地整理活动的更为全面和准确的方法.     

中国征地补偿标准探析

城市化进程使征地形势严峻,更加剧了人地关系危机,确立合理征地补偿标准是有效解决征地问题的关键.本文依据补偿标准理论原则,在比较分析和评价国内外关于征地补偿标准规定的基础上,提出了符合国情的征地补偿标准.     

Habitat associations of a raptor community in a mosaic landscape of Central Spain under urban development

The effects of urban sprawl and the associated road network on patterns of land use by diurnal raptors were assessed in a extent mosaic landscape of Sierra de Guadarrama subjected to exurban development (Madrid province; Central Spain), within the buffer area of a planned national park. During three consecutive years, the sightings of raptors per 0.25 km² were analyzed to identify their habitat preferences according to several vegetation types, urban cover and length of paved roads. Species richness increased with the amount of deciduous forests of Pyrenean oak Quercus pyrenaica and parklands of Narrow-leaved Ash Fraxinus angustifolia in lowland areas, while it decreased with cover of urban/suburban areas. Analyzing the three most abundant species separately, urban development had a negative influence on the Common Buzzard Buteo buteo and the Black Kite Milvus migrans, although positively affected the Booted Eagle Hieraaetus pennatus, probably through an increase in the availability of its potential prey within urban areas. This study did not find a negative influence of the road network, either considering total species richness or the three most abundant species separately. The current levels of urban development diminished the suitability of the study area for the raptor community overall (though particular species can be favoured), notably when residential sprawls are established over ash parklands traditionally devoted to cattle grazing.     

Environmental Monitoring of Spatio-temporal Changes Using Remote Sensing and GIS in a Mediterranean Wetland of Northern Greece

Loss and degradation of terrestrial and aquatic habitats and degraded water quality are major environmental concerns worldwide. Especially wetlands are sensitive ecosystems that are subject to stress from human activities. Remote sensing techniques have been primarily used to generate information on land cover/use changes. Geographical Information Systems (GIS) and remote sensing can be used to provide a rapid or a large-scale understanding of lake change and in developing lake management strategies. The principal objectives of this study are to monitor and assess the spatial and temporal changes in land cover/use by using GIS, and to determine the main environmental factors affecting these changes. This paper presents a case study for the application of integrated remote sensing and GIS data for the classification and monitoring of the spatial and temporal changes in land use types. The study was conducted in a small natural wetland of Lake Cheimaditida, located in the East Mediterranean region of Northern Greece. Data analysis was conducted using GIS software. During the past several decades Lake Cheimaditida wetland has been influenced by many anthropogenic activities. The variables chosen for the assessment included condition of wetland and lake areas, present extent of wetlands relative to historic area, cover of natural habitat, wetland disturbances, etc. These variables address catchments properties that are important for maintaining and improving wetland habitats and water quality and assessment of trends useful for environmental monitoring. Land cover/land use patterns were assessed and compared using aerial photographs taken in 1945, 1969, 1982, and 1996. Over this period, reed beds enormously increased by 1,655.19%, while open-water areas and peat lands decreased by 74.05 and 99.5%, respectively. The significance of the changes in land cover distribution within the Lake Cheimaditida wetland are discussed in relation to the historical pattern of reed beds colonization, the importance of Phragmites australis in the process and the implications for strategic management of freshwater wetland resources.     

山东省第二次土地调查工作探讨

简述了山东省土地调查工作现状和第二次全国土地调查工作的基本概况,着重探讨了土地调查的工作流程和技术流程,并对一些技术问题做了研究。     

灌阳县新街乡土地整治项目土地平整设计

根据灌阳县新街乡土地整治项目的基本情况,介绍了土地平整思路、设计原则及要点,总结经验,指出土地平整中应注意的一些问题,为类似工程的设计提供参考。