Japan Geoscience Union Meeting 2014

Presentation information

Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-TT Technology & Techniques

[M-TT41_28PM2] Mapping and spatial representation in geoscience

Mon. Apr 28, 2014 5:06 PM - 5:57 PM 422 (4F)

Convener:*Mamoru Koarai(Geographic Information Analysis Research Division, Geography and Crustal Dynamics Research Center, Geographical Survey Institute), Atsushi Suzuki(Faculty of Geo-environmental Science, Rissho University), Chair:Mamoru Koarai(Geographic Information Analysis Research Division, Geography and Crustal Dynamics Research Center, Geographical Survey Institute), Atsushi Suzuki(Faculty of Geo-environmental Science, Rissho University)

5:06 PM - 5:21 PM

[MTT41-P05_PG] Development of the CS (Curvature and Slope) topographical map

3-min talk in an oral session

*Kenichiro TODA1, Hiromu DAIMARU2, Mamoru KOARAI3, Takayuki NAKANO3, Junko IWAHASHI3 (1.Nagano Prefecture Forestry Recerch Center, 2.Forestry and Forest Products Reserch Institute, 3.Geospatial Information Authority of Japan)

Keywords:CS topographical map, topographical interpretation, curvature, slope

For the topographical interpretation, we developed CS (Curvature and Slope) topographical map to visualize micro-relief that affect landslide susceptibility in mountain area. The CS topographical map represents valleys by blue color and ridges by red color, simultaneously steep slopes are assigned to dark color. We produced CS topographical map for the entire area of Nagano Prefecture from airborne LiDAR DEM and conducted many micro landslide such as linear depressions in landslide blocks, valley head hollows were recognized, and they were confirmed by subsequent field survey. The CS topographical map provides us with many information about distribution of micro-relief in mountain area, and it may be a prominent tool for evaluating landslide susceptibility.