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An integrated raster-tin surface flow algorithm

Pilesjö, Petter LU (2008) Conference on Terrain Analysis and Digital Terrain Modelling, 2006 In Lecture Notes in Geoinformation and Cartography p.237-255
Abstract

In this chapter, an alternative surface flow algorithm is presented. The basic idea behind the algorithm is the use of the advantages of TIN-based algorithms within a raster based environment. A gridded raster DEM is used to create a ‘regular TIN’, over which surface flow is estimated. Since each facet in the TIN has a constant slope and slope direction, the estimations of, for example, flow velocity and diversion/convergence are less complicated compared to traditional ‘cell based’ solutions. The flow is treated as ‘water packages’, given specific (point) positions on the surface. The number of water packages per cell is initially set to eight, but this number can be increased or decreased. After each time step, the water packages have... (More)

In this chapter, an alternative surface flow algorithm is presented. The basic idea behind the algorithm is the use of the advantages of TIN-based algorithms within a raster based environment. A gridded raster DEM is used to create a ‘regular TIN’, over which surface flow is estimated. Since each facet in the TIN has a constant slope and slope direction, the estimations of, for example, flow velocity and diversion/convergence are less complicated compared to traditional ‘cell based’ solutions. The flow is treated as ‘water packages’, given specific (point) positions on the surface. The number of water packages per cell is initially set to eight, but this number can be increased or decreased. After each time step, the water packages have moved a certain distance (depending on slope and water depth), and new water packages have been created due to precipitation. In order to keep the number of water packages constant (to reduce memory and computer time), all water packages within a TIN facet are merged after each iteration. Parameters in time and space, e.g. precipitation, infiltration, vegetation and elevation, can all be loaded into the software.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
DEM, Hydrological modelling, Surface flow, TIN, Topographical modelling
host publication
Lecture Notes in Geoinformation and Cartography
series title
Lecture Notes in Geoinformation and Cartography
editor
Zhou, Qiming ; Tang, Guo-an and Lees, Brian
issue
199049
pages
19 pages
publisher
Springer Science and Business Media B.V.
conference name
Conference on Terrain Analysis and Digital Terrain Modelling, 2006
conference location
Nanjing, China
conference dates
2006-11-23 - 2006-11-25
external identifiers
  • scopus:85032862496
ISSN
1863-2351
1863-2246
ISBN
9783540778004
9783540777991
DOI
10.1007/978-3-540-77800-4_13
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2008, Springer Berlin Heidelberg. All rights reserved.
id
f5ebaa77-f15f-45fb-a10c-dd7d764e56d1
date added to LUP
2022-03-25 13:06:15
date last changed
2024-01-03 09:27:46
@inbook{f5ebaa77-f15f-45fb-a10c-dd7d764e56d1,
  abstract     = {{<p>In this chapter, an alternative surface flow algorithm is presented. The basic idea behind the algorithm is the use of the advantages of TIN-based algorithms within a raster based environment. A gridded raster DEM is used to create a ‘regular TIN’, over which surface flow is estimated. Since each facet in the TIN has a constant slope and slope direction, the estimations of, for example, flow velocity and diversion/convergence are less complicated compared to traditional ‘cell based’ solutions. The flow is treated as ‘water packages’, given specific (point) positions on the surface. The number of water packages per cell is initially set to eight, but this number can be increased or decreased. After each time step, the water packages have moved a certain distance (depending on slope and water depth), and new water packages have been created due to precipitation. In order to keep the number of water packages constant (to reduce memory and computer time), all water packages within a TIN facet are merged after each iteration. Parameters in time and space, e.g. precipitation, infiltration, vegetation and elevation, can all be loaded into the software.</p>}},
  author       = {{Pilesjö, Petter}},
  booktitle    = {{Lecture Notes in Geoinformation and Cartography}},
  editor       = {{Zhou, Qiming and Tang, Guo-an and Lees, Brian}},
  isbn         = {{9783540778004}},
  issn         = {{1863-2351}},
  keywords     = {{DEM; Hydrological modelling; Surface flow; TIN; Topographical modelling}},
  language     = {{eng}},
  number       = {{199049}},
  pages        = {{237--255}},
  publisher    = {{Springer Science and Business Media B.V.}},
  series       = {{Lecture Notes in Geoinformation and Cartography}},
  title        = {{An integrated raster-tin surface flow algorithm}},
  url          = {{http://dx.doi.org/10.1007/978-3-540-77800-4_13}},
  doi          = {{10.1007/978-3-540-77800-4_13}},
  year         = {{2008}},
}