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Volume 51 (1987 - 198･･･
- Issue 5 Pages 1-
- Issue 4 Pages 219-
- Issue 3 Pages 141-
- Issue 2 Pages 73-
- Issue 1 Pages 1-
Volume 51, Issue 1
Displaying 1-3 of 3 articles from this issue
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Yoji AOKI1987 Volume 51 Issue 1 Pages 1-10
Published: August 25, 1987
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSRecent years, several researches had pointed out the perferable effects of the greenery on the impression of landscape. And many studies have resulted those effects to be depented on the amount of greeney in the field of vision. The ratios of greenery are fluctuating at the width of visual field. Then the effect of greenery was simply depended on the width of visual field. But referred studies had measured the ratios with the unvaried field of vision.
This study has aimed at the development of the appropriate visual field to measure the ratio of greenery as to the residential environment. The respondents had visited to the various types of roads and parks where people can usually contact with greenery, and responded the impression of the amount of greenery. And the ratios of greenery were measured by various focal distances' lens which provides various width of visual fields. The efficient width of field was examined to the impressions by the method of the regression equation. In the case of the focal concentrate type of landscape, the effective ratio was observed at the focal distance of 85mm lens which provides the width of about 20 degree field of vision. And at the nomal street where people view the landscape along the vista line, 50mm of the focal distance; about 40 degree field of vision, provided the effective result. In the case of the nomal point of park where people look around the landscape, 28mm; about 60 degree field of vision, provided the significant correlation. At the panoramic view of the park where people view along the skyline, about 60×20 degree of field of vision, gave effective results.
This shows that the impression of the amount of greenery is provided the ratio of greenery in the field of vision and the width of field depends on the type of landcape.View full abstractDownload PDF (5564K) -
Grades of vegetation naturalness and of land capability, and the conservation planningByung Ho BAE1987 Volume 51 Issue 1 Pages 11-20
Published: August 25, 1987
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSIn the former paper (Bae and lde, 1982), phytosociological method using the grade of vegetation naturalness was discussed for the conservation planning in Takao Quasi-National park as a case to study. Conservation planning in natural park, however, should be established basically under the synthetic analysis including the analysis of both biological elements indicated by vegetation and physical elements which can be integrated into land.
In this paper, grades of vegetation naturalness and of land capability were selected as biological and physical indexes, respectively, and a zoning plan based on the characteristics of natural environment was presented by using such indexes for the conservation of the natural park.
Physical elements are indicated by slope type and degree, which are thought to give a great influence on land uses. Land classification according to the difference of the slopes was carried out in the study area. physical land units were presented and their significance for the land use items were discussed. Results showing the relationship between land units and land use items was summarized into the grades of land capability which contain five different ranks. Land capability grade map was drawn as shown in Fig.1. Every process here was done at the scale of 1: 10, 000.
The land capability grade map was combined with the map of vegetation naturalness grade (Fig.2). Zoning plan (Fig.3) for the conservation of natural park was made from the result of overlaying two grade maps. The grade of vegetation naturalness V and that of land capability V have priority in conservation. Existing conservation plan (Fig.4) was compared with the zoning plan presented here and the way of its improvement was suggested.View full abstractDownload PDF (1658K) -
Kyozo CHIBA1987 Volume 51 Issue 1 Pages 21-26
Published: August 25, 1987
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSBehaviors of heavy metal elements with air-borne dusts carried into suburban forests were investigated. Concentrations of Cr, Pb, Ni, Fe, Cu, Mn, and Zn held in rain water, in through-fall and in run-off water were measured for 8 months from May to December 1984. The through-fall were collected from 8 different vegetations which stood close to each other on a hill adjacent to the city of Okayama Japan. Besides the concentrations of the elements in the forests soils and in the forest trees were measured. The concentrations of the elements in the throug-hfalls were not always higher than those in the rain water, that suggested the captures of the heavy metal elements by the canopies weren't so simple as to have been presumed. On the other hand, the run-off water was reduced remarkably in the concentration compared with the through-fall. The filtration and defoliation caused heavy metal elements to accumulate in Ao-layer to a great extent. Forest treees made also the suburban forest work as an effective heavy metal elements filter by deposits of the elements within tree bodies.View full abstractDownload PDF (870K)
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