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| Titel |
The obective mapping of channel initiation and landsliding on lidar DTMs in Japan and their interaction with vegetation |
| VerfasserIn |
Paola Passalacqua, Colin P. Stark, Yuichi S. Hayakawa, Zhou Lin, Takashi Oguchi, Tsuyoshi Hattanji |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050224
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| Zusammenfassung |
| The advent of meter-resolution swath mapping lidar data is revolutionizing the study of geomorphic processes. Objective feature mapping algorithms allow the identification of channel heads from topographic data alone. As a result, curvature-slope-area properties can now be measured at channel heads rather than having to be assumed a priori in order to delineate channels on the DTM, thus providing an opportunity to study in greater depth the processes governing channel head initiation. We apply GeoNet, a recently developed automatic channel extraction methodology, to lidar DTMs of several upland catchments in Japan. We find a strong dependence of channel head density on the spatio-temporal pattern of landsliding and we discuss observations of slope-area relations in this context. |
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