Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins
Joint Authors
Sagar, B. S. Daya
Lim, Sin Liang
Source
Discrete Dynamics in Nature and Society
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-26, 26 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-06-20
Country of Publication
Egypt
No. of Pages
26
Main Subjects
Abstract EN
We present a framework to characterize terrestrial functions—surficial and bottom topographic regions that are represented, respectively, as raster digital elevation models (DEMs) and digital bathymetric models (DBMs)—through analysis of flow fields that are simulated via geodesic morphology.
Characterization of such functions is done via a new descriptor.
Computation of this new descriptor involves the following steps: (i) basin in digital form representing topographic fluctuations as an input, (ii) threshold decomposition of basin—that consists of channelized and nonchannelized regions—into sets, (iii) proper indexing of these sets to decide the marker set(s) and its (their) corresponding mask set(s), (iv) performing geodesic propagation that provides basic flow field structures, and (v) finally providing a new basin descriptor—geodesic spectrum.
We demonstrated this five-step framework on five different synthetic and/or realistic DEMs and/or DBMs.
This study provides potentially invaluable insights to further study the travel-time flood propagation within basins of both fluvial and tidal systems.
American Psychological Association (APA)
Lim, Sin Liang& Sagar, B. S. Daya. 2008. Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins. Discrete Dynamics in Nature and Society،Vol. 2008, no. 2008, pp.1-26.
https://search.emarefa.net/detail/BIM-462607
Modern Language Association (MLA)
Lim, Sin Liang& Sagar, B. S. Daya. Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins. Discrete Dynamics in Nature and Society No. 2008 (2008), pp.1-26.
https://search.emarefa.net/detail/BIM-462607
American Medical Association (AMA)
Lim, Sin Liang& Sagar, B. S. Daya. Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins. Discrete Dynamics in Nature and Society. 2008. Vol. 2008, no. 2008, pp.1-26.
https://search.emarefa.net/detail/BIM-462607
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-462607