巻号一覧
27 巻 (1966)
- 4 号 p. 135-
- 3 号 p. 95-
- 2 号 p. 49-
- 1 号 p. 1-
27 巻, 1 号
選択された号の論文の5件中1～5を表示しています
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流域地質による化学組成の変化志賀 史光, 細川 巌1966 年 27 巻 1 号 p. 1-15
発行日: 1966/03/30
公開日: 2009/06/12
ジャーナル フリーFrom July 1964 to July 1965 the author has investigated the chemical composition of the Ono as a typical river which flows Aso welded tuff area, and found out some relations between the chemical composition of the waters and the geological features of its basins.
Results obtained are as follows.
(1) High content of SiO2 is one of the characteristics of the Ono river. In drainage from Aso welded tuff, SiO2 content is extremely high. SiO2 content in Takeda springs is 73.5 ppm and 46.4% to the salinity, and in the river waters near Takeda-City it is 53.6ppm and 43.4% on an average. And HCO3 content is also high. In Takeda springs its content is 80.2ppm and 25.4% as CO3 and in the river waters near Takeda-City it is 60.6ppm and 24.5% respectively. In Aso welded tuff area, SiO2 content is in direct proportion to HCO3 content. On the other hand, there is no relation between the content of these two components in the river waters which flow through sedimentary rock area as in the Banjo system. The river waters of the Banjo from sedimentary rocks with limestone area have 12.5ppm of SiO2 content and 19.5% to the salinity. And the other waters of the Banjo have 13-24ppm and 26-30%. These values are much smaller than those of Aso welded tuff area.
(2) Regarding the HCO3/SiO2 mole ratio, the ratios in the waters in Aso welded tuff area are 1.1-1.3, and in sedimentary rock area they are 2.0-2.5 respectively.
(3) The SiO2/ΣK equivalent ratio is larger than 1.4 in the waters in Aso welded tuff area, and in sedimentary rock area the value is smaller than 0.8 (ΣK represents the sum of Na, K, Ca and Mg).
(4) The Mg/Ca equivalent ratio in river waters in Aso welded tuff area is larger than 0.45 and that in sedimentary rock area is smaller than 0.40.
(5) In Aso welded tuff area, Na/K equivalent ratio is 3.0 in Takeda springs and 3.4 in the river waters near Takeda-City. Thesa values are smaller than the average value of the waters in Kyushu in which the value is 8.1. In Aso welded tuff area, the waters have constant value of (Na-Cl)/K ratio and this value is 2.3. By comparing this value with that of Aso welded tuff (Na/K=1.9), it can be considered that the seperation of potassium from the waters is smaller than in other districts.抄録全体を表示PDF形式でダウンロード (595K) -
加藤 武雄1966 年 27 巻 1 号 p. 16-24
発行日: 1966/03/30
公開日: 2009/12/11
ジャーナル フリーThe Harai-gawa River, which runs through the southern area of Zao spa, is the only river used for irrigation among the branches of the Su-kawa River.
The upper reaches of the drainage system is partly subjected to the solfataric action of the Zao volcano. In such a place poisonous acid water is often found though localy. On the whole, the quality-of-water shows neutral reaction with a few exceptions. As for anion constituents, the equivalent ratio : Cl-/Σ anion is kept nearly constant throughout the main stream whereas SO42-;/Σ anion increases while flowing down.
From the results of the measurement on the transportation of dissolved substances, the following equations are obtained statistically :
Na+ : Qd=0.016Q0.73
Ca2+ : Qd=0.021Q0.80
SiO2 : Qd=0.031Q1.01
where Qd is dissolved mineral discharge in g/sec and Q flow rate in 1/sec. Similarly, for total evaporation residue, the reration : Qds=0.15Q0.94 is found to exist, In this place, Qds is the product of Ré and Q, and corresponds to the total discharge of dissolved minerals and suspension.抄録全体を表示PDF形式でダウンロード (266K) -
鉄川 精1966 年 27 巻 1 号 p. 25-29
発行日: 1966/03/30
公開日: 2009/06/12
ジャーナル フリーFrom fresh-water pearl, culture-pond, three species sponges and two species bryozoa were obtained. The species of the sponges are Spongilla lacustris (LINNÉ), Heteromeyenia baileyi var. petri (LAUTERBORN), and Ephydatia mülleri var. japonica (HILGENDORF). Those of the bryozoa are Pectinatella gelatinosa OKA and Plumatella emarginata ALLMAN. Among them, Spongilla lacustris and Pectinatella gelatinosa were abundant. Hyriopsis schlegelii is badly affected by the two species.
As the attached colonies develop, the growth of Hyriopsis schlegelii is disturbed, therefore, it is impossible to obtain the pearls of good quality. The partly deformation of shell, or the death of Hyriopsis schlegelii are caused in the worst case.抄録全体を表示PDF形式でダウンロード (1722K) -
渡辺 仁治1966 年 27 巻 1 号 p. 30-39
発行日: 1966/03/30
公開日: 2009/06/12
ジャーナル フリーPlankton was studied on the basis of three samples which were collected by Prof. M. Tsuda in Daizabôzu-ike Pond and Rondenga-ike Pond in the Iizuna Heights, Nagano Prefecture, in August, 1965.
Thirty eight species of phytoplankton and seventeen species of zooplankton were found in Daizabôzu-ike Pond sample, the abundant species being Melosira italica (Bacillariophyta) and Keratella cochlearis (Rotifera). The plankton of this pond are mostly cosmopolitan. Some species such as Nostoc paldosum, Melosira distans and others are alpine species.
In Rondenga-ike Pond sample, fifty four species of plankton were found, one half of which being same as the species of Daizabôzu-ike Pond. The dominant components are Melosira italica, M. distans (Bacillariophyta) and Difflugia acuminata var. inflata, Phryganella haemispherica (Protozoa).
At the shore of Rondenga-ike Pond, the water bloom was seen forming the reddish brown scum at water surface. It seems that the scum is formed by Peridinium Elpatiewskyi.抄録全体を表示PDF形式でダウンロード (2020K) -
加藤 武雄1966 年 27 巻 1 号 p. 40-47
発行日: 1966/03/30
公開日: 2009/06/12
ジャーナル フリーMt. Issaikyo is the active volcano in the Azuma volcano region. In the vicinity of this mountain, several lakes are distributed. They are represented by Lake Goshiki-numa, Lake Kama-numa and Lake Oké-numa. Among them Lake Goshiki-numa is the crater lake located between Mt. Issaikyo and Mt. Iekata. The survey of this lake was carried out in 1963 to 1964. The results obtained are summarized as follows.
(1) As is shown by Fig. I in the text, this lake has an elliptical shape, whose minor axis is 280m and major axis 410m.
(2) Even in mid-summer, this lake exhibits only little thermal stratification. In late summer, the circulation of the lake water takes place completely. Such a phenomenon may suggest that this belongs to HUTCHINSON's "third-class lake".
(3) The observation of the photosynthetic productivity and the quality-of-water reveals that this lake is of the type of oligotrophic lake.抄録全体を表示PDF形式でダウンロード (317K)
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