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A triangular form-based multiple flow algorithm to estimate overland flow distribution and accumulation on a digital elevation model

Pilesjö, Petter LU and Hasan, Abdulghani LU (2014) In Transactions in GIS 18(1). p.108-124
Abstract
In this study, we present a newly developed method for the estimation of surface flow paths on a digital

elevation model (DEM). The objective is to use a form-based algorithm, analyzing flow over single cells

by dividing them into eight triangular facets and to estimate the surface flow paths on a raster DEM. For

each cell on a gridded DEM, the triangular form-based multiple flow algorithm (TFM) was used to distribute flow to one or more of the eight neighbor cells, which determined the flow paths over the DEM.

Because each of the eight facets covering a cell has a constant slope and aspect, the estimations of – for

example – flow direction and divergence/convergence are more intuitive and less... (More)
In this study, we present a newly developed method for the estimation of surface flow paths on a digital

elevation model (DEM). The objective is to use a form-based algorithm, analyzing flow over single cells

by dividing them into eight triangular facets and to estimate the surface flow paths on a raster DEM. For

each cell on a gridded DEM, the triangular form-based multiple flow algorithm (TFM) was used to distribute flow to one or more of the eight neighbor cells, which determined the flow paths over the DEM.

Because each of the eight facets covering a cell has a constant slope and aspect, the estimations of – for

example – flow direction and divergence/convergence are more intuitive and less complicated than many

traditional raster-based solutions. Experiments were undertaken by estimating the specific catchment area

(SCA) over a number of mathematical surfaces, as well as on a real-world DEM. Comparisons were made

between the derived SCA by the TFM algorithm with eight other algorithms reported in the literature.

The results show that the TFM algorithm produced the closest outcomes to the theoretical values of the

SCA compared with other algorithms, derived more consistent outcomes, and was less influenced by

surface shapes. The real-world DEM test shows that the TFM was capable of modeling flow distribution

without noticeable ‘artefacts’, and its ability to track flow paths makes it an appropriate platform for

dynamic surface flow simulation. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Transactions in GIS
volume
18
issue
1
pages
108 - 124
publisher
Wiley-Blackwell
external identifiers
  • wos:000329499900006
  • scopus:84891952677
ISSN
1467-9671
DOI
10.1111/tgis.12015
language
English
LU publication?
yes
id
2468c746-7559-40e6-bb29-e356a993dd3a (old id 4022712)
date added to LUP
2013-09-11 10:51:51
date last changed
2017-07-23 03:02:04
@article{2468c746-7559-40e6-bb29-e356a993dd3a,
  abstract     = {In this study, we present a newly developed method for the estimation of surface flow paths on a digital<br/><br>
elevation model (DEM). The objective is to use a form-based algorithm, analyzing flow over single cells<br/><br>
by dividing them into eight triangular facets and to estimate the surface flow paths on a raster DEM. For<br/><br>
each cell on a gridded DEM, the triangular form-based multiple flow algorithm (TFM) was used to distribute flow to one or more of the eight neighbor cells, which determined the flow paths over the DEM.<br/><br>
Because each of the eight facets covering a cell has a constant slope and aspect, the estimations of – for<br/><br>
example – flow direction and divergence/convergence are more intuitive and less complicated than many<br/><br>
traditional raster-based solutions. Experiments were undertaken by estimating the specific catchment area<br/><br>
(SCA) over a number of mathematical surfaces, as well as on a real-world DEM. Comparisons were made<br/><br>
between the derived SCA by the TFM algorithm with eight other algorithms reported in the literature.<br/><br>
The results show that the TFM algorithm produced the closest outcomes to the theoretical values of the<br/><br>
SCA compared with other algorithms, derived more consistent outcomes, and was less influenced by<br/><br>
surface shapes. The real-world DEM test shows that the TFM was capable of modeling flow distribution<br/><br>
without noticeable ‘artefacts’, and its ability to track flow paths makes it an appropriate platform for<br/><br>
dynamic surface flow simulation.},
  author       = {Pilesjö, Petter and Hasan, Abdulghani},
  issn         = {1467-9671},
  language     = {eng},
  number       = {1},
  pages        = {108--124},
  publisher    = {Wiley-Blackwell},
  series       = {Transactions in GIS},
  title        = {A triangular form-based multiple flow algorithm to estimate overland flow distribution and accumulation on a digital elevation model},
  url          = {http://dx.doi.org/10.1111/tgis.12015},
  volume       = {18},
  year         = {2014},
}