巻号一覧
29 巻 (1987)
- 4 号 p. 153-
- 3 号 p. 121-
- 2 号 p. 89-
- 1 号 p. 1-
29 巻, 2 号
選択された号の論文の3件中1～3を表示しています
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-環境トリチウムと水質による地下水の循環と滞留時間-表 相根, 櫃根 勇1987 年 29 巻 2 号 p. 89-98
発行日: 1987/05/30
公開日: 2012/12/11
ジャーナル フリーThe groundwater flow system in an upland area which faces a lake is analyzed to investigate thefollowing aspects: (1) the role of dissected valley on a groundwater drainage system; (2) interaction betweenupland groundwater and lake water; and (3) the regional groundwater flow patterns. Threedimensionalanalyses are used to represent the actual phenomenon of the groundwater flow system bymeans of tracer method. Environmental tritium and water quality are used as groundwater tracer, andwater samples arc obtained in a regional scale. For the interpretation of tritium data, groundwater agesare estimated using the convolution integral method with consideration of infiltration rates as theweighting function.
The results, which are of a preliminary stage, indicate that: (1) two main rivers and dissected valleysare playing important role as the groundwater drainage system of the upland; (2) groundwater isrecharged in the upland area and is primarily discharged to the river or valley as a whole; (3) thegroundwater flow interactions between upland and lake are not occurred actively; and (4) groundwater,deeper than about 20 meter below sea level, flows very slowly as a different flow systm from thosein the upper layers.抄録全体を表示PDF形式でダウンロード (993K) -
唐 常源, 田瀬 則雄, 新藤 静夫, 田中 勝, 倉田 文1987 年 29 巻 2 号 p. 99-105
発行日: 1987/05/30
公開日: 2012/12/11
ジャーナル フリーBy measuring pressure heads through an auto-recording tensiometer, behavior of soil water was observed in a crop field, which was affected by irrigation for surrounded paddy fields, in the Dejima area of Ibaraki Prefecture. Major observations are as follows:
(1) Behavior of soil water in a crop field near padd y fields is very affected by fluctuation of water table, rainfall, and evaporation.
(2) During the irrigation period, flux of soil water is generally downward in surface zone and upward in and above capillary zone and convergent zero flux plane is formed in and after rainfall. On the other hand, downward flux is generally dominant during the non-irrigation period.
(3) The auto-recording tensiometer is a very effective tool to trace the soil water in the unsaturated zone.抄録全体を表示PDF形式でダウンロード (696K) -
野尻 幸宏1987 年 29 巻 2 号 p. 107-111
発行日: 1987/05/30
公開日: 2012/12/11
ジャーナル フリーPDF形式でダウンロード (507K)
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