부산대학교 도서관

We analyzed the distribution of direct sunlight on sloped farmlands on clear days using a combination of 3D model and GIS analysis. First, we used a 3D model that spatially simplifies the location of northward slopes and forests in order to identify the areas where objects on the slopes provide shade from direct sunlight and identified the distribution of the areas on the slope that are shielded from direct sunlight. By changing the height, width, and slope direction of the objects, we were able to examine how the distribution of areas shielded from direct sunlight would change. In addition, by dispersing the objects along the slope, we were able to examine the relationship between areas shielded from direct sunlight and the height, width, and spacing of objects. We compared these results against a GIS-generated sunlight distribution map for northward sloping farmlands located in central Kochi Prefecture. This comparison showed that the distribution of sunlight in the area examined matched the distribution obtained based on the 3D model analysis. This confirms that the relationship between the position of scattered forests, in addition to the forest surface area and topographical conditions, is an important factor in evaluating the sunlight distribution of sloped lands. As a result of this study, we have been able to identify a basic sunlight distribution structure for sloped farmlands.