龙门山南段(芦山段)旅游资源遥感调查与评价   总被引：1，自引：0，他引：1  

范继跃  何政伟  赵银兵  孙传敏 《测绘科学》2007,32(3):96-98

芦山县地处龙门山南段,是成都平原向龙门山山地过渡的地带,特殊的地质、地貌条件和人类活动造就了区内山体、峡谷、岩溶、瀑布、湖泊、河流、森林和花卉等一大批自然景观,同时孕育了大批极具旅游价值的人文景观。这些旅游景观多以点状方式散布在全县范围内,人们对于全县的旅游资源,尤其是自然景观的分布范围和规模没有一个全面的认识,为此必须对芦山县的旅游资源进行大范围的调查。但是逐一调查每个景观难度较大,也难以从宏观和微观两个层次上去把握资源的分布和特征,本文利用ETM遥感图像,按照先解译自然景观,再结合其他资料间接判定人文景观的方法,实现了对区内旅游资源的调查和评价。  相似文献   

黑龙江省林口县五义屯石墨矿矿床地质特征及找矿方向          下载免费PDF全文

杨瑞  郝凯波  梁景利  王子金  周红芳  王鹏 《地质找矿论丛》2022,37(3):310-315

天山—兴蒙造山带是国内晶质石墨矿的主要成矿带,已查明柳毛石墨矿、石场石墨矿等多个大型沉积型石墨矿床,五义屯石墨矿矿床是近年在该带上新探获的一座大型晶质石墨矿床。本文阐述了该矿床的区域地质背景、地球物理特征、矿床地质特征,并分析了矿床成因和找矿方向。结果表明,该矿床是大型沉积变质型石墨矿床,矿体具明显层控特征,主要赋存于中-新元古界麻山岩群余庆岩组中;矿体品位厚度稳定,主要呈大鳞片粒级;矿体与围岩地球物理特征差异明显,具明显低阻高极化特征;本矿床具有成为超大型石墨矿床的潜力,其外围对寻找沉积变质型石墨矿床具有良好的资源远景。  相似文献   

新疆拜城新近系含铜岩系沉积体系及沉积环境   总被引：1，自引：1，他引：0  

时文革  巩恩普  褚亦功  张永利  姚玉增  王铁晖  马伟  赵纯福 《沉积学报》2015,33(6):1074-1086

新疆拜城地区发育一套新近纪巨厚的陆相碎屑沉积岩系,其中康村组中上部含规模较大的沉积型铜矿,康村组的沉积环境及演化过程对铜矿的形成具有重要意义。基于野外和室内详细的沉积学研究,查明研究区新近系吉迪克组、康村组和库车组总体上为陆相沉积体系,主要包括冲积扇-扇三角洲沉积体系和湖泊沉积体系两大类型,划分为扇三角洲平原、扇三角洲前缘、前扇三角洲、滨浅湖和膏盐湖亚相及若干沉积微相。研究表明研究区康村期主要发育扇三角洲沉积,矿区主要含矿层位于康村组上部红色岩系向灰色岩系转变,沉积环境从扇三角洲前缘亚相到滨浅湖亚相过渡的层位上。  相似文献   

河北省阜城县韩关地裂缝的影响因素与防治措施          下载免费PDF全文

邢晓晨  张朝辉  寇秋焕 《地质找矿论丛》2015,30(3):456-459

河北省阜城县韩关地裂缝的出现给当地人民的生命财产造成了很大的威胁和损失。文章阐述了韩关地裂缝的发育形态、分布特征以及地质灾害危害程度,分析了地裂缝的影响因素及形成机理,预测了地裂缝发展趋势,提出了防治地裂缝的措施和建议,为防灾减灾提供了科学依据。  相似文献   

黄土丘陵沟壑区地形复杂度分析   总被引：2，自引：0，他引：2  

何文秀  石云 《测绘科学》2015,(10):146-152

针对黄土丘陵沟壑区地形复杂度难以准确量化的问题,该文提出了基于区统计的评价方法,采用地形分析方法提取坡度、地势起伏度、地表切割深度,沟壑密度等地形因子,应用区统计法、变异系数法对研究区地形复杂度进分析评价。结果表明:彭阳县地形复杂度的空间分布特征与坡度、地势起伏度、地表切割深度的变化规律相似,中复杂区域和高复杂区域所占面积较大,且存在明显的分异规律;基于1:50 000数字高程模型数据的地形复杂度提取与分析方法能够快速有效地获取研究区地形地貌信息,为黄土丘陵沟壑区流域治理、土地规划、地形及景观格局的分区和尺度推绎等研究提供依据。  相似文献   

Understanding Place Attachment to the County in the American Great Plains          下载免费PDF全文

Jeffrey S. Smith  Jordan M. McAlister 《Geographical review》2015,105(2):178-198

The American Great Plains is a region dominated by a flat, treeless, semiarid environment that has challenged population settlement for over 140 years. As railroad companies successfully attracted pioneers to settle the land, state governments established hundreds of counties. Following Jeffersonian ideals, many of the counties were small in area so they could better serve the local agricultural‐based population. When states established these counties, they envisioned that the population would continue to grow and the Great Plains would become the breadbasket of North America. Unfortunately that did not materialize. A succession of hardships combined with serious environmental constraints has discouraged large‐scale settlement in the region. Many counties reached their maximum population in the early 1900s and their totals have decreased ever since (in some counties by as much as 60 percent to 80 percent). This has led a number of government officials to consider consolidating counties much like school districts have been combined. Using Logan and Gove counties in western Kansas as a case study, our purpose is to understand how attached people are to the county in which they live. Employing multiple methods, we gathered information about how different segments of the population regard their local county. We learned that changing computer technology and the Internet has the biggest impact on peoples' attachment to the county seat.  相似文献   

Linking pesticides and human health: A geographic information system (GIS) and Landsat remote sensing method to estimate agricultural pesticide exposure     

《Applied geography (Sevenoaks, England)》2015

Accurate pesticide exposure estimation is integral to epidemiologic studies elucidating the role of pesticides in human health. Humans can be exposed to pesticides via residential proximity to agricultural pesticide applications (drift). We present an improved geographic information system (GIS) and remote sensing method, the Landsat method, to estimate agricultural pesticide exposure through matching pesticide applications to crops classified from temporally concurrent Landsat satellite remote sensing images in California. The image classification method utilizes Normalized Difference Vegetation Index (NDVI) values in a combined maximum likelihood classification and per-field (using segments) approach. Pesticide exposure is estimated according to pesticide-treated crop fields intersecting 500 m buffers around geocoded locations (e.g., residences) in a GIS. Study results demonstrate that the Landsat method can improve GIS-based pesticide exposure estimation by matching more pesticide applications to crops (especially temporary crops) classified using temporally concurrent Landsat images compared to the standard method that relies on infrequently updated land use survey (LUS) crop data. The Landsat method can be used in epidemiologic studies to reconstruct past individual-level exposure to specific pesticides according to where individuals are located.  相似文献   

县域城镇化水平综合测评及其动力构成分析——以河北省为例     

吴建民  任国荣  丁疆辉 《地理与地理信息科学》2015,31(3)

构建县域城镇化综合测评指标体系,包含经济城镇化、就业城镇化、市场城镇化、人口和基础设施城镇化.运用熵值法测算了河北省县域城镇化水平,发现2001-2012年县域城镇化水平处在上升状态,主要表现为人口城镇化、基础设施和农村非农就业的改变,但城镇化发展并未提供较多的城镇就业岗位和促进工业企业营利能力的提升.从多年平均看,人口和基础设施子系统对县域城镇化水平贡献份额最大,市场子系统贡献份额最小,各子系统有不同的时段特征.采用多元回归模型分析了影响县域城镇化水平的动力因素,显示推动力呈现多元化特点,各种动力共同助推县域城镇化水平的提高,但动力大小有差异,依次表现为政府动力、市场动力、社会动力.  相似文献   

鲁北临盘地热资源特征及开发利用          下载免费PDF全文

张兴乐 《山东国土资源》2002,18(6):44-46

鲁北临盘地热资源丰富 ,热储层为新近纪黄骅群馆陶组 ,热储盖层为新近纪黄骅群明化镇组和第四纪平原组 ,热源主要来自地壳深部正常热流传导。目前已钻凿 2口地热井 ,开发利用效益显著。地热开发要避开油气层 ,石油开发要防止污染地热储水层。  相似文献   

滕州泉上煤矿碳酸盐岩富水性及对煤层开采的影响          下载免费PDF全文

朱昌元  燕伟  李文东 《山东国土资源》2006,22(5):42-45

通过滕县煤田(南部)泉上煤矿井下实际揭露及钻孔资料,分析研究了十下灰岩、奥灰富水性特征及石炭二叠纪月门沟群对太原组16,17煤层开采的影响,认为在开采16煤层时,必须遵循“深部疏水降压,浅部采煤”的方针;在开采17煤层时,正常情况下不会受到奥灰水的威协;在井巷开拓过程中必须慎重对待十二灰,应先查明十二灰与奥灰的关系,防止奥灰底鼓水危害。  相似文献