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基于GIS的西南三江矿点空间格局分析
矿点 最邻近点指数 局部自相关 核密度
2018/3/30
西南三江是我国重要的矿产资源储藏地,以矿床(点)数据为基础,采用最邻近点指数、局部自相关、核密度方法从不同空间尺度探索矿点空间格局。结果表明:总体上自北向南梯度递减,自西向东先增后减；点格局的最近邻指数为0.72,暗示矿点分布具有一定的聚集性；县域尺度,西起类乌齐县东至德格县呈高—低聚集,垂直方向上德格县至香格里拉县、德钦县至云龙县地区呈高—高聚集；核密度显示矿点多中心聚集在北部地区；受构造控制明...
Groundwater Flow Patterns and Hydrochemical Facies Distribution Using Geographical Information System (GIS) in Damaturu, Northeast Nigeria
Groundwater Chemical Facies GIS Rock-Water Interaction Cations and Anions
2013/3/11
The present study attempts to define the relationship between groundwater flow systems and the distribution of chemical facies with the aid of Geographical Information System (GIS). The study also ide...
Application of Electrical Resistivity and Chargeability Data on a GIS Platform in Delineating Auriferous Structures in a Deeply Weathered Lateritic Terrain, Eastern Cameroon
Gold Exploration Tropical Settings Deep Weathering
2013/3/11
Exploration for primary gold in tropical settings is often problematic because of deep weathering and the development of a thick soil cover. In this paper we present the results of both chargeability ...
GIS-Based Model to Assess Erosion Sensitivity in Northern Morocco. Laou Watershed Case Study
Soil Erosion Laou Watershed Environment GIS
2013/3/8
This application on the Laou watershed represents the first part of study results that concerns the development of a model for mapping soil susceptibility at a regional scale in northern Morocco using...
以甘肃北山花岗岩中发育的构造裂隙(主要指节理)为研究对象,采用高精度GPS、罗盘等对其进行现场测量,获取裂隙的迹长及产状信息,并将信息导入ArcGIS平台建立裂隙属性数据库; 进而应用地质统计分析理论,以裂隙面密度P21为地质统计分析的区域性变量,探索花岗岩岩体裂隙空间分布特征; 然后借助ArcGIS软件平台建立变异函数模型,利用地质统计学的普通克里金插值方法得到整个区域的面密度预测分布图。结果表...
Hydromorphological Mapping and Analysis for Characterizing Darfur Paleolake, NW Sudan Using Remote Sensing and GIS
Darfur Groundwater Sudan Paleodrainage Network
2013/3/7
The north-western part of Sudan, which is the driest region on earth has revealed newly surface and near surface paleodrainage network underneath sand sheets indicating the possibilities for economic ...
Application of Geographic Information System (GIS)in Mapping Groundwater Quality in Uyo, Nigeria
Groundwater Pollution Water Quality GIS Uyo Urban
2013/3/7
In recent years there has been serious concern on the deteriorating groundwater quality due to the activities of man. Geographic Information System (GIS), a high performance computer based tool is pla...
Quantitative Estimation of Coastal Changes Along Selected Locations of Karnataka, India: A GIS and Remote Sensing Approach
Coastal Geomorphology Shoreline Coastal zone Erosion Accretion Beach
2013/3/7
Qualitative and quantitative studies on changes of coastal geomorphology and shoreline of Karnataka, India have been carried out using toposheets of Survey of India and satellite imageries (IRS-P6 and...
中国火灾的时空演变特征——基于GIS的统计分析
火灾综合损失 主成分分析法 时空演变 黑河—腾冲线
2013/9/23
研究对象为2000-2009年中国341个地级以上城市(不含台湾及港澳地区)的火灾统计数据。首先应用主成分分析法,计算火灾综合损失(fire composite losts,FCL);再对FCL进行分级,将所有研究单元按FCL从小到大分为5个级别,较高FCL单元主要分布于黑河—腾冲线以东地区。对每个研究单元分别进行时间序列分析,观察其FCL变化趋势,将各区域分为平稳区、改善区、恶化区和波动区,其分...
SEPAL – a simple GIS-based tool to estimate sediment pathways in lowland catchments
SEPAL GIS
2010/2/3
Even though soil loss in the lowlands imposes not as much a restriction on land use and agricultural productivity as in erosion affected mountainous areas, the input of fine sediment into the rivers a...
Large scale debris-flow hazard assessment: a geotechnical approach and GIS modelling
Large scale debris-flow hazard assessment a geotechnical approach GIS modelling
2009/12/10
A deterministic distributed model has been developed for large-scale debris-flow hazard analysis in the basin of River Vezza (Tuscany Region – Italy). This area (51.6 km 2 ) was affected by over 250 l...
Rockfall hazard mapping along a mountainous road in Switzerland using a GIS-based parameter rating approach
Rockfall hazard mapping a mountainous road Switzerland a GIS-based parameter rating approach
2009/12/10
A posteriori studies of rock slope instabilities generally show that rockfalls do not occur at random locations: the failure zone can be classified as sensitive from geomorphological evidence. Zones s...
Regional-scale GIS-models for assessment of hazards from glacier lake outbursts: evaluation and application in the Swiss Alps
Regional-scale GIS-models glacier lake outbursts evaluation and application the Swiss Alps
2009/12/10
Debris flows triggered by glacier lake outbursts have repeatedly caused disasters in various high-mountain regions of the world. Accelerated change of glacial and periglacial environments due to atmos...
A GIS-based numerical model for simulating the kinematics of mud and debris flows over complex terrain
GIS-based numerical model kinematics of mud debris flows complex terrain
2009/12/10
This article presents MassMov2D, a two-dimensional model of mud and debris flow dynamics over complex topography, based on a numerical integration of the depth-averaged motion equations using a shallo...
A web-based GIS for managing and assessing landslide data for the town of Peace River,Canada
web-based GIS managing and assessing landslide data town of Peace River
2009/12/8
Assessment of geological hazards in urban areas must integrate geospatial and temporal data, such as complex geology, highly irregular ground surface, fluctuations in pore-water pressure, surface disp...