Embedding landscape processes into triangulated terrain models

Enrique Vivoni, Vanessa Teles, Valeriy Y. Ivanov, Rafael L. Bras, Dara Entekhabi

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Triangulated irregular networks (TIN) can form the basis for multiple-resolution representations in distributed hydrogeomorphic simulations over complex basins. Current methods for deriving TIN meshes depend primarily on surface slope without considering other terrain attributes significant to the watershed response such as the specific basin area. As an alternative, we present a methodology for combining a hydrogeomorphic or landscape index with an unstructured triangulated mesh. Landscape indices provide a concise method for describing steady-state terrain processes by isolating the dominant physical factors. The mesh-generation algorithm results in an adaptive discretization that resembles the spatial pattern of the landscape index with a high resolution retained in areas expected to impact the basin response. We compare the proposed algorithm with a slope-preserving method as a means for initializing the terrain representation in two TIN-based hydrogeomorphic models. Through three case studies in saturation-excess runoff, transport-limited soil erosion and shallow landslide simulation, we assess the distributed model sensitivity to the triangulated terrain algorithm. Model comparisons reveal that the process-based triangulations focus the distributed simulation in regions anticipated via a steady-state index to affect the transient watershed response.

Original languageEnglish (US)
Pages (from-to)429-457
Number of pages29
JournalInternational Journal of Geographical Information Science
Volume19
Issue number4
DOIs
StatePublished - Apr 2005
Externally publishedYes

Fingerprint

triangulated irregular network
Watersheds
simulation
Mesh generation
Landslides
basin
watershed
Triangulation
model comparison
Runoff
Catchments
Erosion
triangulation
soil erosion
Soils
erosion
landslide
saturation
runoff
methodology

Keywords

  • Distributed models
  • Geomorphology
  • Hydrology
  • Index
  • Landscape processes
  • Mesh generation
  • Topography
  • Triangulated irregular networks

ASJC Scopus subject areas

  • Information Systems
  • Geography, Planning and Development
  • Library and Information Sciences

Cite this

Embedding landscape processes into triangulated terrain models. / Vivoni, Enrique; Teles, Vanessa; Ivanov, Valeriy Y.; Bras, Rafael L.; Entekhabi, Dara.

In: International Journal of Geographical Information Science, Vol. 19, No. 4, 04.2005, p. 429-457.

Research output: Contribution to journalArticle

Vivoni, Enrique ; Teles, Vanessa ; Ivanov, Valeriy Y. ; Bras, Rafael L. ; Entekhabi, Dara. / Embedding landscape processes into triangulated terrain models. In: International Journal of Geographical Information Science. 2005 ; Vol. 19, No. 4. pp. 429-457.
@article{2705c243f9d44284bbb43625035dbfb3,
title = "Embedding landscape processes into triangulated terrain models",
abstract = "Triangulated irregular networks (TIN) can form the basis for multiple-resolution representations in distributed hydrogeomorphic simulations over complex basins. Current methods for deriving TIN meshes depend primarily on surface slope without considering other terrain attributes significant to the watershed response such as the specific basin area. As an alternative, we present a methodology for combining a hydrogeomorphic or landscape index with an unstructured triangulated mesh. Landscape indices provide a concise method for describing steady-state terrain processes by isolating the dominant physical factors. The mesh-generation algorithm results in an adaptive discretization that resembles the spatial pattern of the landscape index with a high resolution retained in areas expected to impact the basin response. We compare the proposed algorithm with a slope-preserving method as a means for initializing the terrain representation in two TIN-based hydrogeomorphic models. Through three case studies in saturation-excess runoff, transport-limited soil erosion and shallow landslide simulation, we assess the distributed model sensitivity to the triangulated terrain algorithm. Model comparisons reveal that the process-based triangulations focus the distributed simulation in regions anticipated via a steady-state index to affect the transient watershed response.",
keywords = "Distributed models, Geomorphology, Hydrology, Index, Landscape processes, Mesh generation, Topography, Triangulated irregular networks",
author = "Enrique Vivoni and Vanessa Teles and Ivanov, {Valeriy Y.} and Bras, {Rafael L.} and Dara Entekhabi",
year = "2005",
month = "4",
doi = "10.1080/13658810512331325111",
language = "English (US)",
volume = "19",
pages = "429--457",
journal = "International Journal of Geographical Information Science",
issn = "1365-8816",
publisher = "Taylor and Francis Ltd.",
number = "4",

}

TY - JOUR

T1 - Embedding landscape processes into triangulated terrain models

AU - Vivoni, Enrique

AU - Teles, Vanessa

AU - Ivanov, Valeriy Y.

AU - Bras, Rafael L.

AU - Entekhabi, Dara

PY - 2005/4

Y1 - 2005/4

N2 - Triangulated irregular networks (TIN) can form the basis for multiple-resolution representations in distributed hydrogeomorphic simulations over complex basins. Current methods for deriving TIN meshes depend primarily on surface slope without considering other terrain attributes significant to the watershed response such as the specific basin area. As an alternative, we present a methodology for combining a hydrogeomorphic or landscape index with an unstructured triangulated mesh. Landscape indices provide a concise method for describing steady-state terrain processes by isolating the dominant physical factors. The mesh-generation algorithm results in an adaptive discretization that resembles the spatial pattern of the landscape index with a high resolution retained in areas expected to impact the basin response. We compare the proposed algorithm with a slope-preserving method as a means for initializing the terrain representation in two TIN-based hydrogeomorphic models. Through three case studies in saturation-excess runoff, transport-limited soil erosion and shallow landslide simulation, we assess the distributed model sensitivity to the triangulated terrain algorithm. Model comparisons reveal that the process-based triangulations focus the distributed simulation in regions anticipated via a steady-state index to affect the transient watershed response.

AB - Triangulated irregular networks (TIN) can form the basis for multiple-resolution representations in distributed hydrogeomorphic simulations over complex basins. Current methods for deriving TIN meshes depend primarily on surface slope without considering other terrain attributes significant to the watershed response such as the specific basin area. As an alternative, we present a methodology for combining a hydrogeomorphic or landscape index with an unstructured triangulated mesh. Landscape indices provide a concise method for describing steady-state terrain processes by isolating the dominant physical factors. The mesh-generation algorithm results in an adaptive discretization that resembles the spatial pattern of the landscape index with a high resolution retained in areas expected to impact the basin response. We compare the proposed algorithm with a slope-preserving method as a means for initializing the terrain representation in two TIN-based hydrogeomorphic models. Through three case studies in saturation-excess runoff, transport-limited soil erosion and shallow landslide simulation, we assess the distributed model sensitivity to the triangulated terrain algorithm. Model comparisons reveal that the process-based triangulations focus the distributed simulation in regions anticipated via a steady-state index to affect the transient watershed response.

KW - Distributed models

KW - Geomorphology

KW - Hydrology

KW - Index

KW - Landscape processes

KW - Mesh generation

KW - Topography

KW - Triangulated irregular networks

UR - http://www.scopus.com/inward/record.url?scp=15044366284&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=15044366284&partnerID=8YFLogxK

U2 - 10.1080/13658810512331325111

DO - 10.1080/13658810512331325111

M3 - Article

VL - 19

SP - 429

EP - 457

JO - International Journal of Geographical Information Science

JF - International Journal of Geographical Information Science

SN - 1365-8816

IS - 4

ER -