Gravel bed roughness determined from airborne laser scanning

Guo Hao Huang, Chi Kuei Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We use the airborne laser scanning (ALS) to scan the exposed dry surface of Nan-Shin river in Taiwan with a nominal point density of 100 points/m 2. Numerous studies showed that the fractal dimension is a good measure of the roughness of the gravel surface. The fractal dimension can be estimated from the slope of the log-log plot of the variogram. Because the gravel surface exhibits the anisotropic property, we first use variogram maps of the gravel surfaces to determine the anisotropic directions. Since the gravel surfaces show the self-affinity property, the directional variograms are then used for calculating the fractal dimension in the directions of maximum and minimum continuity. This study may lead to a better understanding of the roughness of the gravel surface using ALS data for the large-scale areas.

Original languageEnglish
Title of host publication32nd Asian Conference on Remote Sensing 2011, ACRS 2011
Pages1927-1932
Number of pages6
Publication statusPublished - 2011 Dec 1
Event32nd Asian Conference on Remote Sensing 2011, ACRS 2011 - Tapei, Taiwan
Duration: 2011 Oct 32011 Oct 7

Publication series

Name32nd Asian Conference on Remote Sensing 2011, ACRS 2011
Volume3

Other

Other32nd Asian Conference on Remote Sensing 2011, ACRS 2011
CountryTaiwan
CityTapei
Period11-10-0311-10-07

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

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