Journal ArticleDOI
Automatic mapping of valley networks on Mars
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TLDR
A novel drainage delineation algorithm specially designed for mapping the valley networks from digital elevation data is presented, which argues that delineated networks are indeed of better quality than the networks manually mapped from images.About:
This article is published in Computers & Geosciences.The article was published on 2007-06-01. It has received 65 citations till now.read more
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Water on Mars
TL;DR: In this paper, the amount of water outgassed from Mars by impact erosion and hydrodynamic escape is estimated to be between 6 to 160 m. The two sets of estimates may be reconciled if early in its history, Mars lost part of its atmosphere.
Journal ArticleDOI
Updated global map of Martian valley networks and implications for climate and hydrologic processes
TL;DR: Using more recent and higher-resolution data sets, including visible, infrared, and topographic data, the authors have manually remapped valleys on a global scale, revealing characteristics of sustained precipitation and surface runoff including inner braided channels, terraces, multiple periods of formation, complex network morphology, and correlation with other fluviosedimentary features and chloride salts on Mars.
Journal ArticleDOI
Objective extraction of channel heads from high-resolution topographic data
TL;DR: In this article, four methods of channel head prediction were tested against field data from four sites with high-resolution DEMs: slope-area scaling relationships, two techniques based on landscape tangential curvature, and a new method presented here, which identifies the change from channel to hillslope topography along a profile using a transformed longitudinal coordinate system.
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A new GRASS GIS toolkit for Hortonian analysis of drainage networks
JarosŁaw Jasiewicz,Markus Metz +1 more
TL;DR: A new GRASS GIS toolset designed for Hortonian analysis of drainage networks using a multiple flow direction algorithm for stream network extraction as well as for calculating other hydrogeomorphological features in the catchment's area is presented.
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A robust, two‐parameter method for the extraction of drainage networks from high‐resolution digital elevation models (DEMs): Evaluation using synthetic and real‐world DEMs
TL;DR: In this paper, a method for drainage network extraction from high-resolution digital elevation models (DEMs) is presented, which requires just two user-defined parameters and is capable of handling discontinuous valley networks.
References
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The extraction of drainage networks from digital elevation data : Computer Vision
Abstract: The extraction of drainage networks from digital elevation data is important for quantitative studies in geomorphology and hydrology. A method is presented for extracting drainage networks from gridded elevation data. The method handles artificial pits introduced by data collection systems and extracts only the major drainage paths. Its performance appears to be consistent with the visual interpretation of drainage patterns from elevation contours.
Journal ArticleDOI
The extraction of drainage networks from digital elevation data
TL;DR: The method handles artificial pits introduced by data collection systems and extracts only the major drainage paths and its performance appears to be consistent with the visual interpretation of drainage patterns from elevation contours.
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A new method for the determination of flow directions and upslope areas in grid digital elevation models
TL;DR: In this paper, a new procedure for the representation of flow directions and calculation of upslope areas using rectangular grid digital elevation models is presented, based on representing flow direction as a single angle taken as the steepest downward slope on the eight triangular facets centered at each grid point.
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On the extraction of channel networks from digital elevation data
TL;DR: A criterion for determining the appropriate drainage density at which to extract networks from digital elevation data is suggested to extract the highest resolution (highest drainage density) network that satisfies scaling laws that have traditionally been found to hold for channel networks.
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A detachment-limited model of drainage basin evolution
TL;DR: In this article, a drainage basin simulation model incorporating creep and threshold slumping and both detachment-and transport-limited fluvial processes is introduced, and it is argued that fluvial erosion of natural slopes and headwater channels is dominantly detachment-limited.