3:30 PM - 5:00 PM
[MIS10-P03] Three-Dimensional Form and Ground Temperature Conditions of Micro-landform around Mt. Inaboshi-yama, Kuju volcanic Group, Kyusyu Island.
Keywords:micro-landform, three-dimensional form, ground temperature condition, periglacial environment, Mt. Inaboshi-yama, Oita prefecture
Periglacial processes are predominant in the alpine zones of Japan, and periglacial smooth slopes are widely distributed in this area. Various types of patterned ground formations, including periglacial landforms, are formed here. Furthermore, various land formation processes are interconnected in a complex manner. Because different types of even-patterned ground formations exist, it is difficult to confirm whether the formation processes of patterned ground formations have been clarified.
Mt. Inaboshi-yama (1774 masl), located in the southern part of the Kuju volcanic Group, Kyusyu Island, micro-landform similar to the patterned ground found in the alpine zone is distributed. The purpose of this study is to clarify the three-dimensional form and ground temperature of micro-landform distributed in the study area, and to examine their formation process.
In the field survey, aerial photography using unmanned aerial vehicle (UAV) and topographic surveys were performed. Ground temperature observations were carried out at Mt. Inaboshi-yama stations (1681-1703 masl) from December 14th, 2015, to December 13th, 2016.
The results of the survey revealed the following.
1) The three-dimensional form of the micro-landform distributed in the study area was surveyed, and it was found that the form differs depending on the slope direction. The micro-landform on the east-facing slope was in the form of turf-banked terrace, while the west-facing slope was in the form of solifluction lobe.
2) The ground temperature in the study area began to hover around 0°C in November, and freeze-thaw cycles were recorded around May. Furthermore, freeze-thaw cycles were found to be as frequent as in the alpine zones of the Northern and Southern Alps, Japan.
Mt. Inaboshi-yama (1774 masl), located in the southern part of the Kuju volcanic Group, Kyusyu Island, micro-landform similar to the patterned ground found in the alpine zone is distributed. The purpose of this study is to clarify the three-dimensional form and ground temperature of micro-landform distributed in the study area, and to examine their formation process.
In the field survey, aerial photography using unmanned aerial vehicle (UAV) and topographic surveys were performed. Ground temperature observations were carried out at Mt. Inaboshi-yama stations (1681-1703 masl) from December 14th, 2015, to December 13th, 2016.
The results of the survey revealed the following.
1) The three-dimensional form of the micro-landform distributed in the study area was surveyed, and it was found that the form differs depending on the slope direction. The micro-landform on the east-facing slope was in the form of turf-banked terrace, while the west-facing slope was in the form of solifluction lobe.
2) The ground temperature in the study area began to hover around 0°C in November, and freeze-thaw cycles were recorded around May. Furthermore, freeze-thaw cycles were found to be as frequent as in the alpine zones of the Northern and Southern Alps, Japan.