地理学評論
Online ISSN : 2185-1719
Print ISSN : 0016-7444
ISSN-L : 0016-7444
8 巻, 6 号
選択された号の論文の8件中1~8を表示しています
  • 森 壽美衞
    1932 年 8 巻 6 号 p. 461-481
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
    1. The River Kôri, which flows along the western foot of Volcano Taradake, in the north-east of Kyûshû, deposits part of its load at its eroded valley end, forming an alluvial fan. The gravels composing this fan affect the aspects of the settlements, the cultivated grounds, etc., on the fan
    2. We notice first that most of the houses are surrounded by stone walls. These stones are gravels that were removed from such surfaces of the fan as were cleared for cultivation. This paper deals with these stone walls.
    3. Houses with stone walls are more numerous at the apex. than at the foot of the fan, and near the boundaries of rice fields and farms on either side of the fan than in the central part of it. Many such houses are built near the present river course.
    4. Where the walls enclose but a small space, only houses are found, but large enclosures contain farms besides.
    5. The stone walls are solidly built of roundish gravels without bonding of any sort. Large gravels are used for the outside of the walls, the interior being filled with small ones.
    6. On the surface of the fan, there are a few rice-fields, but farms predominate, The reason, for this is that, water cannot be made to stay for any length of time on the surface of the fan as it sinks immediately into the soil.
    7. The gravels are dug out from underneath the farms as well as from the river sides and used for railway ballst and other purposes.
    8. At present the major part of the surface of the fan is cultivated, , though gravels on the farms are now being removed for their improvement.
  • 吉村 信吉
    1932 年 8 巻 6 号 p. 482-504_1
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
    The town of Kamisuwa, Nagano Prefecture is situated at the eastern shore of Lake Suwa, which occupies the Suwa Basin; a long trough runing SE to NW and practically surrounded by high mountains, including the volcanic groups of Kirigamine (1925m) and Yatugatake (2899m). The place is celebrated for its great number of hot springs in the town itself. About five hundred springs are being operated at present, chiefly in the alluvial plain of the Suwa basin. These hot springs have been investigated by D Satô (I) and K. Misawa (2).
    At the request of the Municipality of Kamisuwa, the author investigated the physico-chemical, properties of some of these springs. He examined in all 118 springs including some cold springs outside the town, during the period between Nov. m Dec., 1930, and in Aug., 1931.
    The temperature and pH were 'determined on the spot. The following were determined by analysis, either at the laboratory of the Kamisuwa Municipal Office or at that-of the Geographical Institute., Tokyo Imperial University: H2S, free CO2, carbonate, Ca, Mg, . Na, Fe, Mn, SO4, Cl, SiO2, N2O3, N2O5 P2O5, the amount of KMnO4 consumed, the total residue, etc.
    Excepting for total residue and sodium, volumetric and -colorimetric methods were employed, because of their rapid determinations. Sodium was determined by the uranyl zinc acetate method of Barber and Kolthoff (3).
    From data obtained by these analyses, many maps of temperature distribution and some of chemical composition were drawn. These distributions show two quite different types:
    (1) Water temperature type. As is seen in the distribution of the water temperature, large amounts of Cl, and SO4 are found in several zones arranged en échelon, and slightly oblique to the trend of the fault scarp bordering the eastern side of the Suwa Basin. A temperature of 85°C, and Cll and SO4 in amounts respectively of 300 and 150 mg/l are observed here.
    (2) Water colouration type. This type of distribution has no relation to the echelon distribution of the preceding kind. As is shown in the distribution of carbonate, organic matter, and water colouration, we find a zonal arrangement parallel to the fault scarp. The amounts of these ' substances increase. toward the west, but a rapid rise takes place on the N-S line, which nearly coincides with the trend. of the railway. Both the hot and cold springs that are situated at the western side of the town are coloured yellowish-brown, while those at the eastern side are colourless. At the middle part of the Suwa Basin the carbonate amounts to 200mg/l.
    Total residue and other constituents, such as Na, Ca, etc. show a mixed type of distribution between those of water temperature and water colouration.
    The underground water systems of Kamisuwa are believed to comprise the following three systems:
    (1) Cold-water system of the alluvial fan. This system occupies the eastern margin of the basin, its origin being the sinking of river water down the gravel beds of the alluvial fan. Its temperature is 10°C, colourless, weaky acidic (pH =6.0), and poor in dissolved substances (about 100mg/l).
    (2) Cold-water system of the Suwa Basin. This occupies the, greater part of the basin and is chaiacterised by the yellowish tint of the water. Such. hot springs are . therefore called Akayu or Tetunoyu meaning red or iron hot water, due to abundance of CO2 and alkali earth ions extracted from the basin deposits. The yellowish colour is derived from the humus layer lying between. the basin deposits The water is weakly acidic (pH=6.2) and rich in dissolved substances (about 600 mg/l).
    (3) Juvenile water system. This is colourless and hot (90°C). Dissolved solids: amounts to 1.3gr per liter.
  • 鹿野 忠雄
    1932 年 8 巻 6 号 p. 505-520
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
    1. Glaciated topoyrapity.
    A cirque has been found by the writer just to the north of the top of Mt. Tugitaka (3931m) in Formosa. It is enclosed by the two ridges that are projected out to the north and to the northeast from the main ridge, respectively, opening its mouth northeastward. The floor of the cirque has an elevation of 3818 nM. The lower part o f the wall which is composed of sandstone and shale, is buried by the detritus that has been produced by the vigorous weathering of the high mountains in the' tropical region.
    2. Peneplain remnants.
    It is a. noteworthy fact that flat topped surfaces are often found upon the interstream ridges and at the high level. They are erosion levels truncating the steeply inclined strata of sandstone and shale, and may well be regarded as peneplain remnants. The best examples of this kind are found In a long ridge stretching from Nokosan (3333m) to Antogunzan (3088m), and in a ridge near Tugitakayama (See Fig. 3, 5, 10 & Plate). The former lies at an elevation of 2900-3000m with its area about 32km2, and the approximate elevation of the latterr is about 3500m The prominent peaks that protrude from the peneplain level are regarded as monadnocks.
    3. Piedmont steps. Several steps of erosion levels that have been formed in the course of the succesive uplifts of the mountain lands are well preserved on some of the mountain slopes. The typical example is found near the hiking road that leads from Arisan' to Mt. Niitaka, where three steps of erosion levels are clearly observable at the heights of 2600m, 2800m in, and 3200m.
    4. River terraces. River terraces are very well developed in the upperstream regions of the river Daikôkei, And Dakusuikei. The most conspicuous ones are found in the upstream of a tributary of the river Dakusuikei, where many steps of river terraces are observed between 1200m & 1820m. An astonishing heights of 2730m is measured at a river terrace that lies at the southern flank of Mashozokanzan (3246m).
  • 柳田 國男
    1932 年 8 巻 6 号 p. 521-537
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
  • 1932 年 8 巻 6 号 p. 538-545,552
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
  • 松井 勇
    1932 年 8 巻 6 号 p. 546-547
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
  • 吉村 信吉
    1932 年 8 巻 6 号 p. 547-549
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
  • 村上 英雄
    1932 年 8 巻 6 号 p. 549-552
    発行日: 1932/06/01
    公開日: 2008/12/24
    ジャーナル フリー
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