Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/2012JF002711 |
Mapping Quaternary alluvial fans in the southwestern United States based on multiparameter surface roughness of lidar topographic data | |
Regmi, Netra R.; McDonald, Eric V.; Bacon, Steven N. | |
通讯作者 | Regmi, Netra R. |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
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ISSN | 2169-9003 |
EISSN | 2169-9011 |
出版年 | 2014 |
卷号 | 119期号:1页码:12-27 |
英文摘要 | Quaternary alluvial fans have diverse surface morphologies related to both depositional and weathering processes. Numerous studies have demonstrated that the surface expression and morphometry of alluvial fans can be used as an indicator of their relative age of deposition, but only recently has there been an effort to utilize high-resolution topographic data to differentiate alluvial fans by surface age with automated and quantifiable routines. We developed a quantitative model for mapping the relative age of alluvial fan surfaces based on multiparameter surface roughness values computed from 1m resolution lidar topographic data. Roughness is defined as a function of observational scale and integration of slope, curvature, and aspect topographic parameters. Alluvial fan roughness values were computed across multiple observation scales (3x3m to 150x150m) based on the standard deviation (SD) of slope, curvature (tangential), and aspect topographic parameters. Plots of roughness value versus size of observation scale suggest that the SD of each parameter over a 7x7m observation window best identified the signature of surface roughness elements. Roughness maps derived from slope, curvature, and aspect at this scale were integrated using fuzzy logic. The integrated roughness map was then classified into five relative morphostratigraphic surface age categories (active wash to similar to 400ka) and statistically compared with a similar fivefold surface age map of alluvial fans developed using traditional field surveys and aerial photographic interpretation. The model correctly predicted the distribution and relative surface age of similar to 61% of alluvial fan landforms based on traditional mapping techniques. |
英文关键词 | alluvial fan lidar topographic data surface roughness fuzzy operators |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000333029500002 |
WOS关键词 | EASTERN MOJAVE DESERT ; THEMATIC MAPPER DATA ; SONORAN DESERT ; DEATH-VALLEY ; OWENS-VALLEY ; CALIFORNIA ; MORPHOLOGY ; USA ; PIEDMONT ; FAULT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | Desert Research Institute |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/183374 |
作者单位 | Desert Res Inst, Div Earth & Ecosyst Sci, 2215 Raggio Pkwy, Reno, NV 89512 USA |
推荐引用方式 GB/T 7714 | Regmi, Netra R.,McDonald, Eric V.,Bacon, Steven N.. Mapping Quaternary alluvial fans in the southwestern United States based on multiparameter surface roughness of lidar topographic data[J]. Desert Research Institute,2014,119(1):12-27. |
APA | Regmi, Netra R.,McDonald, Eric V.,&Bacon, Steven N..(2014).Mapping Quaternary alluvial fans in the southwestern United States based on multiparameter surface roughness of lidar topographic data.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,119(1),12-27. |
MLA | Regmi, Netra R.,et al."Mapping Quaternary alluvial fans in the southwestern United States based on multiparameter surface roughness of lidar topographic data".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 119.1(2014):12-27. |
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