Journal ArticleDOI
Numerical definition of drainage network and subcatchment areas from digital elevation models
Reads0
Chats0
TLDR
The primary purpose of the algorithms and computer program is to parameterize rapidly drainage network and subcatchment properties from widely available DEMs for subsequent use in hydrologic surface runoff models, watershed discretizations, or statistical and topological evaluation of drainage networks.About:
This article is published in Computers & Geosciences.The article was published on 1992-07-01. It has received 367 citations till now. The article focuses on the topics: Drainage.read more
Citations
More filters
Journal ArticleDOI
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.
Journal ArticleDOI
Modelling topographic potential for erosion and deposition using GIS
Helena Mitasova,Louis R. Iverson +1 more
TL;DR: The spatial distribution of areas with topographic potential for erosion or deposition was modelled using the approach based on the unit stream power and directional derivatives of surface representing the sediment transport capacity.
Journal ArticleDOI
The assignment of drainage direction over flat surfaces in raster digital elevation models
TL;DR: In this paper, the authors proposed a new approach that improves upon current methods of flat surface treatment, based on the recognition that in natural landscapes drainage is generally away from higher and towards lower terrain, to produce a drainage pattern over the flat surface that is topographically consistent and exhibits flow convergence properties.
Book
Distributed Hydrologic Modeling Using GIS
TL;DR: In this article, the authors bring together the key ingredients necessary to use GIS to model hydrologic processes, i.e., the spatial and temporal distribution of the inputs and parameters controlling surface runoff.
Journal ArticleDOI
The Effect of DEM Raster Resolution on First Order, Second Order and Compound Terrain Derivatives
TL;DR: The quality of DEMs derived from the interpolation of photogrammetrically derived elevation points in Alberta, Canada, is tested and it is revealed that the optimum grid cell size is between 5 and 20 m, depending on terrain complexity and terrain derivative.
References
More filters
Journal ArticleDOI
Quantitative analysis of watershed geomorphology
TL;DR: In this paper, two general classes of descriptive numbers are presented: linear scale measurements and dimensionless numbers, usually angles or ratios of length measures, whereby the shapes of analogous units can be compared irrespective of scale.
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.
Journal ArticleDOI
The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models
TL;DR: In this paper, the authors examined some of the problems of deriving flow pathways from raster digital terrain data in the context of hydrological predictions using TOPMODEL and proposed a strategy for the case where downslope subsurface flow pathways may deviate from those indicated by the surface topography.