巻号一覧
15 巻 (1950 - 1952)
- 3-4 号 p. 81-
- 1-2 号 p. 1-
15 巻, 1-2 号
選択された号の論文の9件中1～9を表示しています
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主として細長き窪地, 凹地及宙水の成因について谷津 榮壽1950 年 15 巻 1-2 号 p. 1-6
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーOwing to. the development of erosion of the upland lying between the Rivers Naka and Kuji in the province of Hitachi, there occurred the recession of ground-water fall line from the cliff end and the fall of ground-water table. This brought about the disappearance of water in the valley, making elongated depressions where marshes and swamps dried up. Shallow wells area left when ground-water fall line receded becomes the area of perched water.抄録全体を表示PDF形式でダウンロード (1032K) -
第1報序論山本 莊毅1950 年 15 巻 1-2 号 p. 7-17
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーThe author collectd pretty many data concerning the deep wells in Japan. The term “deep well” is not used here as in hydraulics but as customary use in Japan, where means artesian well. Most of them are 6 to 12 inches in diameter and 60 to 120 meters deep. The records give us the owner or the name of a well, its location, the diameter (t) and the yield (Q).
The author discussed these records under the following three assumptions : 1) All wells tapped all available confined aquifers, 2) Sinking of the water table in a well by pumping is restricted to 30 meters in general at the maximum state, 3) All records regarding the yields of wells are assumed to be exact, The relation between Q and r is shown in a logarithmic curve (Figs. 1-6). Utilizing these relations converting factor is calculated for each principal confined water district, as shown in tables 1-4, with which the discharge of a well of arbitrary diameter can be converted to that of 12 inches in diameter. Then it proceeded to discuss the hydrological characters of each confined water district, comparing the gradients of Q-r curve with the semi-logarithmic curve (Fig. 7). Two groups can be distinguished : one with the curve of steeper gradients is found in the Kwanto, Ariake Sea and Osaka Bay districts, while the other with a curve of gentler gradients is met with in the Ise Sea, Hokuriku and Setouchi regions.抄録全体を表示PDF形式でダウンロード (1280K) -
元田 茂1950 年 15 巻 1-2 号 p. 18-24
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーThe Uryu electric power reservoir that was filled with water in 1943 has an area of 23.73 sq. km. and a greatest depth of 31 m. In August, 1946, the water of the lake was brown in color and had a limit of visibility of 2.5 m. The thermocline was observed at the depths of 2-8 meters. The dissolved oxygen in water decreased greatly in the strata below 2 m, being contained in the hypolimnetic water lesser than 1 cc/L. The most abundant zooplahkter was Bosmina longirostris, _making up more than 60 % in number of the total zooplankton. As the phytoplankters, Pandorina morum and Westella botryoides were dominant. The stratification of plankton is as shown in fig. 4. The planting of several species of fishes has been carried on since 1943.抄録全体を表示PDF形式でダウンロード (2000K) -
益子 歸來也1950 年 15 巻 1-2 号 p. 25-29
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーSmall ponds and wells on Hegura-jima, an isolated islet on the Sea of Japan 48 km distant from the northern end of the Noto Peninsula were surveyed. The inland waters tested are characterized by having relatively high salinities. The water of two ponds is in mesohaline condition. The plankton of these ponds differs greatly. The larger one is dominated by a rotifer Pedalia fennica and a conchostaracan Heterocypris anomala ?, while the smaller one supports an abundant population of Brachionus plicatilis.抄録全体を表示PDF形式でダウンロード (603K) -
川合 禎次1950 年 15 巻 1-2 号 p. 30-41
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーThe seasonal change of the insect fauna of rapid stream was carried out during a year from December 1947 to Jauuary 1949 in the River Kamo in Kyoto. The insect larvae fluctuated in two maximal population densities in a year, the first occurring from May to June or often July and the second in September or October. Among the caddis-worms, the larvae of both Stenopsychidae and Hydropsychidae showed two maximal occurrences in a year. The larvae of the former family were most abundant in every seasons, their greater populations being found in May-June and August, while those of the latter family were much fewer in numbers than in the former, being found in the greatest abundance in March-April and September. On the contrary, Goera and Glossosomatinae have only a single maximum density in a year. Both of the groups were not found in midsummer. The periods of most abundant. occurrences of the species which belong to those groups overlap one another (fig. 4).抄録全体を表示PDF形式でダウンロード (2237K) -
山元 孝吉1950 年 15 巻 1-2 号 p. 42-50
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーEighteen Japanese species of rotifers belonging to the genera Colurella, Mytilina, Macrochaetus, Trichotria and Lecane are described and figured.抄録全体を表示PDF形式でダウンロード (890K) -
小貫 嘉雄1950 年 15 巻 1-2 号 p. 51-55
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーThe summer phytoplankton of Lake Haruna in 1948 was characterized by an enormous appearance of Anabaena planktonica bloom. The eutrophication of this lake increased remarkably since 1927, declined during a period of 1934-1936, and has risen again in recent years.抄録全体を表示PDF形式でダウンロード (590K) -
小島 力1950 年 15 巻 1-2 号 p. 56-66
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーThe benthic diatom vegetation in the brackish water area of the River Tama near Tokyo was studied during a period from the fall of 1946 to the early summer of 1947. Pools on the dried bed of the river supported the Amphiprora paludosa-Synedra pulchella association, while the running water part was represented by the Gyrosigma fasciola-Melosira nummuloides-Coscinodiscus lacustris association. The change of the dominant species from upper to lower course of the river was Coscinodiscus→Melosira→Gyrosigma in succession,抄録全体を表示PDF形式でダウンロード (1388K) -
1950 年 15 巻 1-2 号 p. 77-78
発行日: 1950/12/10
公開日: 2009/11/13
ジャーナル フリーPDF形式でダウンロード (351K)
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