地理学評論
Online ISSN : 2185-1719
Print ISSN : 0016-7444
ISSN-L : 0016-7444
25 巻, 12 号
選択された号の論文の5件中1~5を表示しています
  • 横田 忠夫
    1952 年 25 巻 12 号 p. 470-477
    発行日: 1952/12/01
    公開日: 2008/12/24
    ジャーナル フリー
    The author investigated some village at the upper streams of the River Oi and Abe, Shizuoka Prefecture. Consequently I understood that tie internal social relation of the village at the upper stream of the river was extremely different from that of the village at its lower stream. I also noticed that the difference in the possession of forests was greatly related to the difference in the social relation as a result of an investigation in regard to the possession of forests in each village. Having researched how the difference in their possession occured in those villages, I observed that ultimately it had been caused by the geographical conditions of facility or difficulty of trafic (communication), the difference in agricultural productivity etc.
    I could understand that at the lower stream of the river, the forests were mnonopolized by a few men who lived in the village, while in the upper stream: of the river, they had been trausfered to timber merchants or other ones who were outside those villages. It was also known that the difference in the powers of the forest-owners had caused the difference in the social relation in each village.
  • 木地 節郎
    1952 年 25 巻 12 号 p. 478-485
    発行日: 1952/12/01
    公開日: 2008/12/24
    ジャーナル フリー
    When the industries agglomerate in an area, an industrial area is formed. In this report, I am intending to analyse the elements cause the industries to agglomerate in an area. These elements can be devided into two factors (1) geographical factors of industrial position and (2) the industrial factors for localization. The geographical factors are the naturall and social conditions of the geographical position to make the growth of industry possible, and the industrial factors mean the condition on which an industry can develop at a pl ace.
    (1) Geographical factors: Accumulation and combination.
    Accumulation; the case that the factors of a place, which can develop an industry, are fit for other industries at the same time.
    Combination; Combination of the industrial places or industrialization of the environs of the industrial area, that is, formation of the larger industrial area by combination of some industrial areas. The accumulation factors are deviled into such elements as materials, labor, power and fuel, and market factors.
    (2) Industrial factors: Duplication and continuation.
    Duplication The industries have the common industrial factors of the same hind, which conform to geographical farctors of a place. The duplication factors are devided into several elements of materials, labor, power and fuel, market, and nature.
    Combination: Three cases are exemplified; the finished goods of an industry are the materials of the other industry. The by-prod cots of an industry, the finished goods of an industry take the auxiliary part for the other industry.
  • 町田 貞, 水山 高幸
    1952 年 25 巻 12 号 p. 486-494
    発行日: 1952/12/01
    公開日: 2008/12/24
    ジャーナル フリー
    The River Watarase is well known as a flood river in Japan, which causes great damages to the human life every year. The writers have studied on the geomorphology and geology in the upper region of the River Watarase, especially on valley forms, stream terraces, kinds of rocks and rock structures. Main subjects which are explained in this paper are summerized as follows:
    (1) The region at the upper course of the River Watarase is chiefly composed of Chichibu system (paleozoic rocks), granites, quartz-porphiries, diabases and other rocks. Landforms of this region are remarkably controlled by the distribution of these rocks and structures.
    (2) The writers have observed many fault plains in detail along the stream course of the Watarase, surveying dips and strikes of the fault plains, breccia, fault clay and shatter zones. It is concluded that many of the stream courses of Watarase and its tributaries are determined by the fault lines. Ages of those faults are old and many valleys of this region are faultline valleys. However, the writers have discovered an example of a new fault moved again after the building of terrace plains. In the region of Chichibu system, many trikes of faults are NNE-SSW or NE-SW and dips are almost vertical or high degree resembling the tendency of bedding plains of rocks, while in the region of granite, the strikes of the faults are generally NW-SE and the dips are of low degree.
    (3) The narrow stream terraces along the River Watarase are classified into three groups. Terrace plains are well developed in some local small basins formed at the cross points of fault lines. At the region of granite, Which forms a clear knick point of the river profile, terrace plains are not well developed, but many small cones are seen, formed by little tributaries from the mountain sides.
  • 市川 正巳
    1952 年 25 巻 12 号 p. 495-504
    発行日: 1952/12/01
    公開日: 2008/12/24
    ジャーナル フリー
    It goes without saying that present our country are ruined by soil erosion, landslips and river floods, etc., No problem is more urgent to conservate our lands. It is very important to study the landslips and river floods in the Japanese today.
    The writer carried out the investigation of mechanism of landslips and their present situations and their influences to the river at the upper, drainage area of the Watarase River.
    Conclusions of this paper are as follows:
    Landslip. have taken place usually at the upper parts of the Watarase drainage area, and many of there are not found in Palaeozoic regions but in granite or agglomerate regions. But, palaeozoic and quartz prophirite rigions of the vicinity of Ashio town habe been waged by the damage from poisonous smoke of Ashio copper mine.
    Types and scales of the landslips are different from rock's properties and scales of landslips in granite regions are the largest and those of palaeozoic regions of the most upper drainage area are very small.
    The factors in these landslips are as follows:
    Resistabilty to weathering from rocks and lower liquid limit of soils are original factors. On the other hand, the natural factors which are the structure of the geological profile, tie influence of rejuvenation, the degree of slope, the slope from. and the effect of vegetation cover are the natural occasional ones. And the human factors which are management of the forest and accelerate to natural erosion, Hence, these factors cause to landslips.
    Great boulders from these landslips are accumulated on the river bed, so run off of the river increases quickly, and they cause to floods.
    It is the basis of the flood control to checkk the landslips and wasted lands in the drainage area of the Watarase River.
  • 1952 年 25 巻 12 号 p. 505-510_1,1
    発行日: 1952/12/01
    公開日: 2008/12/24
    ジャーナル フリー
feedback
Top