The article deals with the terms scree, relief representation, topographic mapping and federal office of topography swisstopo (Switzerland). This paper introduces an automatic method for the symbolization of scree. First, design principles
Statistical analysis of topographic and climatic controls and multispectral signatures of rock glaciers in the dry Andes, Chile (27°-33°S)
The aim of this paper is to analyse the influence of topographic and climatic variables on rock glacier distribution in the dry Andes, and to determine to what degree multispectral Landsat TM/ETM+ data can improve rock glacier detection in this arid
This study characterised gully morphology and activity, identified the factors related to gully volume, and estimated the topographic thresholds for sub-catchments subject to woody encroachment. Firstly, relationships between gully volume, activity
, topography, vegetation cover and road infrastructure were explored. Secondly, site characteristics of 32 sub-catchments with and without gullies were compared. Finally, the topographic thresholds for unstable and stable sub-catchments with and without gullies
, respectively, were estimated using a slope – drainage area relationship. The mean topographic threshold for gully development provided insights into the drainage area and slope conditions needed for gully development. Gully erosion in the study area is most
An erosion risk mapping model has been applied in this work to find the priority action areas of Mauritius and new datasets representing rainfall erosivity and topographic factors were used. Rainfall erosivity was mapped with Fournier Index instead
of rainfall depth. The topographic effect was mapped using a function combining slope length and slope gradient (LS) and was based on the unit contributing area algorithm along with land parcels effect. These new datasets improved the erosion risk mapping
. The model was calibrated using ice volume changes obtained from differentiating digital elevation models based on (i) terrestrial topographic surveys, (ii) the Shuttle Radar Topographic Mission (SRTM), and (iii) aerial photogrammetry. In-situ point
An extensive survey and topographic analysis of 5 watersheds draining the Luquillo Mountains in north-eastern Puerto Rico was conducted to decouple the relative influences of lithologic and hydraulic forces in shaping the morphology of tropical
montane stream channels. GIS-based topographic analysis was used to examine channel profiles, and survey data were used to analyze downstream changes in channel geometry, grain sizes, stream power, and shear stresses. The results suggest that although
Space-for-time substitution along 3 passive margin escarpments (Blue Ridge, Western Ghats, Eastern Ghats) reveals the significance of escarpment jumps and the detachment of topographic outliers, here generically termed ‘buttes’, as key processes
-uniform and unsteady fashion. As a result escarpments can form, be destroyed, reform, and leave topographic vestiges (buttes) of the retreating escarpment. Given the pre-rift geological heterogeneities, there are no a priori reasons why escarpment
The AA. designed a methodology to assess the quality of LiDAR topographical data within rivers using a specific geostatistical method that conducts upscaling as well as interpolation of reference data that takes into account uncertainties
, topographic surface from the underwater river bed up to riparian areas.
of intensive cultivation : the Harod catchment located in Northern Israel. The research uses simulations to study the effect of topographic attributes, soil characteristics, vegetation cover, rainfall intensity and human activities (tillage direction) on the 3
studies are presented. The results suggest the following statements to be made. At local scale the processes are determined by gully morphology, material and energy transport as well as by soil properties. The topographical and lithological factors
a glacier and topographic channelling. Implications for the differentiation of relict landslides, moraines and rock glaciers are discussed and interrelationships between these landforms are considered in terms of an ice-debris process continuum.
approaches is developed to describe the dependence of the friction velocity upon roughness frontal area and real exposed cover rate. The new formulation proposed will allow a more accurate evaluation of shear stress partitioning as a function of topographic
terrain attributes were used to define the SOILSCAPE: hypsometry, slope percentage, relief intensity and dissection. The SRTM30 (Shuttle Radar Topographic Mission) database was used as a base DEM and for the derivation of the slope percentage, relief
different topographic positions: summit, shoulder, backslope and toeslope. A soil profile was examined at each site and a representative sample from each horizon was withdrawn for chemical analyses. The analyses indicated that variation in the soil CEC
data and field-surveyed geomorphological data. The study was carried out in a typical Mediterranean area located in southern Italy. The study area was first characterized from a lithological, pedological, land-use and morpho-topographic point of view
Action anthropique ; Aménagement hydraulique ; Années 1850-2010 ; Bilan sédimentaire ; Birmanie ; Cartographie ; Cyclone ; Delta ; Image satellite ; Irrawaddy ; Littoral ; Mangrove ; Niveau marin ; Salween ; Sédimentation littorale ; Zone
The AA. present a time series of coastline change for the Irrawady delta region of Myanmar using the earliest available navigation chart from 1850, and a set of topographic maps and satellite imagery dating from 1913 to 2006. In contrast to many