dc.contributor.author |
Bertin, Stephane |
en |
dc.contributor.author |
Friedrich, Heide |
en |
dc.contributor.author |
Delmas, Patrice |
en |
dc.contributor.author |
Chan, E |
en |
dc.contributor.editor |
Zhaoyin, W |
en |
dc.contributor.editor |
Lee, JHW |
en |
dc.contributor.editor |
Jizhang, G |
en |
dc.contributor.editor |
Shuyou, C |
en |
dc.coverage.spatial |
Chengdu, China |
en |
dc.date.accessioned |
2016-12-15T01:53:55Z |
en |
dc.date.issued |
2013 |
en |
dc.identifier.citation |
35th World Congress of the International-Association-for-Hydro-Environment-Engineering-and-Research (IAHR), Chengdu, China, 08 Sep 2013 - 13 Sep 2013. Editors: Zhaoyin W, Lee JHW, Jizhang G, Shuyou C. Proceedings of the 35TH IAHR World Congress, Vols I AND II. Tsinghua University. 5584-5595. 2013 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/31396 |
en |
dc.description.abstract |
There is a need for high-resolution topographical data of riverine gravel-beds for hydraulic studies. To date, there is no readily affordable and deployable technique to collect these data, especially over submerged topographies . Terrestrial laser-scanners and proprietary stereo scanners-photogrammetric systems, with associated commercial software, allow exposed gravel-beds to be represented as high -resolution Digital Elevation Models (DEMs), both in the laboratory and field. . Some measurements, yet sparse, were were obtained through-water. However, either the necessary equipment (hardware/software) or the complexity of the methodology restrained the applicability of the findings. For stereo-photogrammetry to be used in hydraulic research, the promise of a versatile technique, which can be adapted to varied variedvaried experiments, with quick high-resolution data acquisition, warranted further development. In this paper, a low-coststereo-photogrammetric system, and its application for gravel-bed studies, is presented, together with an internal performance evaluation. The setup and its principle of operation, which make use of digital consumer cameras and non-commercial photogrammetric process steps, differ from previous photogrammetric systems employed for gravel-bed morphology characterization. The developed system is used in laboratory experiments measuring a water-worked gravel-bed made of fine sediment particles (D 50 of 7-mm ). A variety of DEMs with 0.5 -mm ground resolution, obtained over the same gravel-bed and with variable surface coverage water depth, is presented and the extracted metrics are compared. The presented photogrammetric system shows promise in the advent of a new method for gravel-bed topography measurement at the grain-scale, which allows to be obtained with minimum disturbance . |
en |
dc.publisher |
Tsinghua University |
en |
dc.relation.ispartof |
35th World Congress of the International-Association-for-Hydro-Environment-Engineering-and-Research (IAHR) |
en |
dc.relation.ispartofseries |
Proceedings of the 35TH IAHR World Congress, Vols I AND II |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.subject |
Science & Technology |
en |
dc.subject |
Technology |
en |
dc.subject |
Physical Sciences |
en |
dc.subject |
Engineering, Civil |
en |
dc.subject |
Water Resources |
en |
dc.subject |
Engineering |
en |
dc.subject |
Remote sensing |
en |
dc.subject |
Stereo-photogrammetry |
en |
dc.subject |
Gravel-bed |
en |
dc.subject |
DEM |
en |
dc.subject |
Roughness |
en |
dc.subject |
Image processing |
en |
dc.subject |
WATER |
en |
dc.subject |
ROUGHNESS |
en |
dc.subject |
FLUME |
en |
dc.title |
On the Use of Close-Range Digital Stereo-Photogrammetry to Measure Gravel-Bed Topography in a Laboratory Environment |
en |
dc.type |
Conference Item |
en |
pubs.begin-page |
5584 |
en |
pubs.author-url |
https://www.iahr.org/site/cms/contentDocumentView.asp?chapter=42&category=372&article=1212 |
en |
pubs.end-page |
5595 |
en |
pubs.finish-date |
2013-09-13 |
en |
pubs.publication-status |
Published |
en |
pubs.start-date |
2013-09-08 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Proceedings |
en |
pubs.elements-id |
486329 |
en |
pubs.org-id |
Engineering |
en |
pubs.org-id |
Civil and Environmental Eng |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
School of Computer Science |
en |
pubs.record-created-at-source-date |
2016-12-15 |
en |