著者

清水 欣一

出版者

Japan Society of Engineering Geology

雑誌

応用地質 (ISSN:02867737)

巻号頁・発行日

vol.7, no.2, pp.51-78, 1966-06-01 (Released:2010-06-04)

参考文献数

29

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Unit area discharge of groundwater, Z of typical groundwater basins in Chugoku-Shikoku District was computed, and the relation between Z and their hydrogeological conditions was inspected. The results are as follows:(1) It seems that there is a mutual relation between Z of confined and unconfined groundwater of Shikoku Setonaikai coastal plain areas, Hirusenbara area and Misato area and Y value. Value, Y is a ratio of total annual precipitation in the catchment area of groundwater basin to the area of groundwater basin.(2) It is also noted to be some mutual connections between Z of Shikoku Setonaikai coastal plain areas and the degree of development of aquifer, especially of gravel bed.(3) Apparent unit area discharge of spring, Z of the North-West area of Mt. Daisen Volcano and Kusama Karst areas shows a linear zonal relationship with discharge average of spring in “Z-Q-n/A” diagram (Fig. 7).(4) Though land-subsidence by over-pumping has not been occurred in Shikoku Setonaikai coastal plain areas, Z of these areas shows higher value than that of typical land subsidence areas in Japan such as Tokyo downtown area, Osaka sea-side area and Niigata coastal plain area. Salt-water intrusion has been occured in some coastal aquifers of Shikoku Setonaikai coastal plain areas. From above results, the author insists to be of importance to compare Z of various groundwater basins with their hydrogeological conditions for the evaluation, further development and the conservation of groundwater resources.

著者

瀬野 錦蔵 山本 荘毅 木内 四郎兵衛 清水 欣一

出版者

日本陸水学会

雑誌

陸水学雑誌 (ISSN:00215104)

巻号頁・発行日

vol.29, no.1, pp.1-12, 1968-05-28 (Released:2009-10-16)

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The lake Togo-ike with its area of 4. 1 km2 and maximum depth of 5. 2 m. is a brackish lake and situated on the middle part of Tottori Prefecture. There are many hot springs such as Togo, Shin-Togo and Asazu in and around the lake. The authors studied the influence of the change of lake level due to polderling on the discharge of hot springs. The results obtained are summarized as follows : (1) Togo hot spring group has the same chemical constituents and ground temperature, suggesting that they have the same origin under the ground.(2) Some of these springs discharge through the lake bottom into the lake, but they give little influence on the quality of lake water.(3) Factors which will affect the discharge of spring water are barometric pressure, rain-fall amount, lake level change, tidal change and pumping. Barometric change and tidal change are not separated. Distinguished effects of rain-fall and lake level upheaval are shown in Table 5. Pumping effect is also obvious.(4) The effect of lake water level change on the spring discharge, dQ/dh is larger at Azusa than that of at Togo (Table 6). It suggests that change of lake water level affects directly to the discharge of hot spring.The results above mentioned lead us to the conclusion that the polderling of this lake will cause the decrease of hot spring discharge.