Transactions, Japanese Geomorphological Union 30(3) 227-231 Jul 2009
Pedestal heights of reef limestone on the coastal terrace in Kikai Island are reexamined with regard to the depth of surrounding sand layer. An old photograph (Shibusawa Film) taken in 1936 suggests that the pedestals on the terrace II surface were artificially buried with sand. Photogrammetric measurement reveals that the sand fill layer is deeper than 60cm, whose depth has been considerably u...
Transactions, Japanese Geomorphological Union 30(1) 1-13 Jan 2009
Recession of waterfalls is a significant agent in bedrock river erosion and development, but field data on waterfall recession rates have been limited due mainly to the lack of information on initiation age and recession distance of waterfalls. This study examines recession rates of fault-scarp waterfalls that were formed along the Chelungpu surface fault at the 921 Chi-Chi Earthquake on Septem...
Transactions, Japanese Geomorphological Union 30(1) 29-38 Jan 2009
Combined use of LRF (laser range finder) and DGPS (differential global positioning system) enables quick and cost-effective acquisition of detailed topographic data in field sites (Hayakawa and Tsumura, 2008, Transactions, Japanese Geomorphological Union 29, 421-434). However, the accuracy of the measurement method remains to be clarified especially in relation to the reference data from other ...
Transactions, Japanese Geomorphological Union 29(4) 421-434 Oct 2008
A topographic dataset, including topographic map and digital elevation model (DEM), is fundamental for various kinds of field-based sciences including geomorphology, geology and archaeology. However, to make a detailed topographic map by traditional or high-tech methods is often expensive and time-consuming. A method of quick, on-site acquisition of topographic data using a handheld laser range...
Journal of Geography(Chigaku Zasshi) 112(4) 521-530 Aug 2003
The mean recession rate of Kegon Falls is examined, estimating original location and age. Two locations (LI and LII) at which the waterfall originated are estimated based on the distribution of Kegon lava, while the age of origination is considered to be the same as that of the Kegon lava eruption, i.e., 20, 000 years ago. Two values of the mean recession rate obtai...
