Studies on the Change of Soil Environment with Reference to the Establishment of Ski Ground.

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  • スキー場の造成による土壌環境の変化
  • スキージョウ ノ ゾウセイ ニヨル ドジョウ カンキョウ ノ ヘンカ

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In this research, the ski grounds developed on the mountain side slopes of the OHU mountains, running longitudinally through Iwate prefecture in Japan, were selected as the survey stands.<BR>We compared those ski grounds with their nearly parallel neighboring natural forest belts to examine how those ski grounds affect the environmental conditions of earth such as surface erosion and somephysical properties of soil including permeability, hardness of soil, and coarse porosity. The results of the examinations are as outlined below. 1. Soil hardness The surface soil of the ski ground was apparently much harder than that of corresponding forest-belts. 2. Permeability: The forest land was apparently greater in saturated hydraulic conductivity and coarse porosity at spots on the slope different from the neighboring ski ground. On the other hand, the surface soil of the ski ground indicated the lowering of permeability in the order of nearly 10-3. 3. Volume weight: The ski ground was apparently greater in volume weight at spots on the slope different from than the forest land. 4. Soil pH: A tendency toward a gradual increase in the pH of the soil was observed in the ski ground as a result of the line that is scattered over the ski ground after each ski season. 5. Erosion depth: An increase in erosion depth was observed on the surface of the ski ground, especially a marked increase in erosion depth in a ski ground which was most recently developed. 6. Infiltration: As a result of laboratory experiments examining the infiltration of soil in the ski ground using a simple lysimeter, we found that both the loss of litter and the hardening of ground surface considerably affect the infiltration rate of soil.

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