垦利县土地整理开发工作要点探索

伴随经济社会的不断发展,土地需求逐步增加,土地供应日趋紧张,规范土地整理开发行为,科学指导土地整理开发工作意义重大。以位于黄河三角洲的垦利县为例,根据其土地利用特点,分析开发整理工作取得成效及存在问题,探索土地整理开发工作要点,为今后开发整理工作提供理论指导和借鉴。     

Shifting farming-pastoral ecotone in China under climate and land use changes

Meteorological records show a rise in temperature and decrease in precipitation in most parts of the farming-pastoral ecotone of Northern China over the last 50 years. During the last quarter of the 20th Century, the agrarian sector went through a series of reforms and changes in government policies on land use that have led to extensive changes in land cover. The objective of this study was to redefine the location and analyze the boundary variations under the effects of climate and land use changes in the farming-pastoral ecotone of Northern China. The results showed that the location of study area has been redefined as both a climatic ecotone from the perspective of suitability of precipitation and temperature for agricultural crops and vegetation growth, and also a land use ecotone based on the impacts of farmland restructuring by government policies on land use. In recent decades, the climatic boundary has moved southeast while the land use boundary has moved northwest, showing opposing directions of change. The extent of boundary changes in the northeast and northern sections are far greater than in the northwestern section of the farming-pastoral ecotone of Northern China.     

Assessment of charcoal driven deforestation rates in a fragile rangeland environment in North Eastern Somalia using very high resolution imagery

Multi-temporal very high resolution satellite images and field work have been used for quantifying the tree cutting rate over a 5 years period in a very arid tiger bush area of North Eastern Somalia with intensive charcoal production activities. By applying both a classical area frame sampling approach with visual interpretation of the samples and a semi-automatic tree detection algorithm, it was possible to create baseline tree density layers for the 2 years of observation and to quantify the tree cutting rates for the period from 2001 to 2006. An average annual tree loss of −2.8%, coupled with the total absence of regrowth during the 5 years study period, confirm the tremendous ecological impacts of charcoal driven tree cutting on tiger bush vegetation. Analysis of the results evidences spatial and temporal patterns in the cutting locations and poses the basis for a better understanding of the ecological and human dimensions of deforestation in the fragile rangeland environment of Northern Somalia.     

烟台经济开发区土地储备工作探讨

近年来,烟台经济开发区重视土地储备工作,从完善规章制度入手,对土地储备工作运行机制进行了规范。加强了土地资源的优化配置,实现了土地收益的最大化,有力的支持了当地经济的发展。但仍存在着一些不容忽视的问题,针对存在的问题进行了分析、探讨,并提出相应的对策建议。     

莱州市土地管理办公自动化系统建设

莱州市国土资源局土地管理办公自动化系统采用工作流技术,基于浏览器/服务器(B/S)三层体系结构设计,实现了土地管理办公自动化和国土信息的对外发布。系统采用可视化流程设计,并预留GIS接口,方便今后系统的扩展和升级。系统建成后,大大提高了莱州市国土资源局各业务部门的业务处理速度和协同工作效率。     

广西永福县土地利用变化驱动力分析

以永福县1996--2005年土地利用变更数据和经济统计年鉴为依据,研究其10年间土地利用类型的变化,分析土地利用动态变化和利用程度变化情况,探讨土地变化的驱动因素。认为社会发展和经济增长、人口和城镇化水平以及宏观政策是影响其土地利用变化的3个主要驱动力因素。     

黄河银川平原段河道演变的遥感监测与研究

 在遥感调查和监测的基础上，结合第四纪地质资料，对黄河银川平原段的河道演变过程进行了系统研究，对主要的河流改道原因进行了分析。研究表明： 黄河银川平原段在早更新世初期形成，此后，自西向东不断迁移； 在中晚更新世发展壮大，到全新世形成了银川平原的主体，并留下了明显的古河道遗迹； 到了现代，河道逐步变窄，向东迁移的趋势未变且速度依然很快。     

Effects of lithology and land use on storm run-off in east luxembourg

For a large part of the year, the forested catchments in the Keuper formation of east Luxembourg produce more direct run-off on a storm basis than paired cultivated catchments. The occurrence of shrinkage cracks, their pronounced opening and closing, and the occurrence of natural pipes in the forested environment play a major role in explaining this phenomenon. The effect of land use on storm run-off is studied in relation to that found for lithology in the same area.     

贵阳市土地类型和自然区划

一定区域内的土地特征,是该地自然条件的全面综合反映。因此,在土地类型调查研究基础上,按照土地结构的相似性和差异性,自下而上地合并自然区划单位,更能准确地反映客观实际。     

横断山区近代气候变化的研究

横断山地处我国西南的藏东、川西和滇西北一带,境内地形复杂,平均海拔在3000米以上。长期以来,由于资料短缺,对该地区历史时期气候变化研究甚少。经实地考察,作者获取若干树木年轮标本,辅以其它类型资料,对该地区最近数百年来的温度、降水变化及气候类型演替,予以初步分析。并论及气候变化的振幅与周期性。