Mathematical models have been widely used to quantify hydrological processes for various practical purposes. These depend on geomorphological attributes which are derived from relief information represented by Digital Elevation Models (DEM). The objective of this study was evaluate the influence sources (ASTER, SRTM-30, SRTM-90, and TOPO) over characterization five Brazilian watersheds. Geoproc...

[1] The discovery of hydrocarbon lakes in the polar regions of Titan offers a unique opportunity to compare terrestrial lakes with those in an extraterrestrial setting. We selected 114 terrestrial lakes formed by different processes as analogs for comparison with the 190 Titanian lakes that we had mapped in our previous study. Using the Shuttle Radar Topography Mission (SRTM) C-band backscatter...

The concept of this research is justified to the integration of landscape components for hydrological modelling within distributed models. Distributed models are based on homogeneous entities which are delineated using landscape parameters such as topography, land use, soil, and geology. In ungauged basins most of these required data are only available on a coarse spatial resolution. In order t...

Topographic mapping traditionally was based on aerial images. With high and very high resolution optical space images now a competition to aerial images exists. The optical space images today are available without restrictions. Dominating criteria for mapping are the accuracy and the information content – what elements can be identified in the images. The accuracy is determined by the scene ori...

The purpose of this study is to identify the possible environmental implications caused by the irregular expansion of the urban spot in Permanent Preservation Areas of the Apeú, Castanhal and Igarapé do Defunto streams. In this study, a 30-year time scale was considered, from 1987 to 2017. Satellite and radar images made available by INPE and USGS were used for the elaboration NDVI indices. In ...

[1] We find that the standard deviation, hence error, of the water surface elevation data from the Shuttle Radar Topography Mission (SRTM) is 5.51 m for basin-wide, regional and local Amazon mainstem reaches. This error implies a minimum reach length of 733km in order to calculate a reliable water-surface slope. Resulting slopes are 1.92 ± 0.19 cm/km for Manacapuru, 2.86 ± 0.24 cm/km for Itapeu...

17 Abstract—This study outlines a method for generating an 18 automated micro-landform map of an alluvial plain for 19 further flood hazard assessment by combining Shuttle Radar 20 Topographic Mission Digital Elevation Model (SRTM DEM) 21 and satellite images. Average elevation and channel features 22 extracted from DEM are associated with soil moist condition 23 (thresholds of Modified Normali...

The efficacy of integrating open access geospatial data to produce habitat suitability maps for the corn bunting (Miliaria calandra) was investigated. Landsat Enhanced Thematic Mapper Plus (ETM+), Shuttle Radar Topography Mission (SRTM) and Corine (Coordination of Information on the Environment) land cover data for the year 2000 (CLC2000) were processed to extract explanatory variables and divi...

SAR mosaics are often not precisely geo-referenced because topographic distortions were not removed during the mosaicking process due to the lack of adequate digital elevation models (DEMs). The Shuttle Radar Topography Mission (SRTM) has recently provided high-resolution DEM data with nearly global coverage, and makes it possible to geo-rectify SAR mosaics. Though techniques are available for ...