[HGM04-P08] Human-disturbed topography formed by past charcoal production in valley-head hollows in the Ohmatsuzawa Hills, Sendai, northeastern Japan
Keywords:charcoal production, artificial topography, valley head, hill
A few kinds of human-disturbed topography are distributed at two valley heads. The area and relief of the topography are about maximum 50 square meter and less than 2 meters respectively, which are widely smaller than those of natural micro-landforms composing the valley heads. Although humus layer is lacking in the soil profile on the human-disturbed topography, the A-horizon of over 10 centimeters thick, containing less inorganic material and charcoal fragments, is developed in the downslope.
The characteristics of the human-disturbed topography indicate that the activity for charcoal production in a valley head have neither caused remarkable changes on natural micro-landforms nor accelerated surficial slope processes.