On the recovery process of the groundwater depression cone in a high permeable aquifer

概要

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The shape and recovery process of the groundwater depression cone in a high permeable aquifer which has a steep inclination water table, are different from those in a gentle area. As an example, the author investigated the characteristics and movement of the influence circle caused by the yield of a very large quantity of groundwater due to digging for building construction. In the case of an inclined groundwater table as in a fan, the influence circle caused by the yield of groundwater by a well is in general deformed and elongated in the downstream direction. As a result of the present study, it can be said that the same pattern occurs in conjunction with the yield of a very large quantity of groundwater such as by digging for construction, althogh there are some differences in relation to the nature of the aquifer condition and recharge mechanisms. Moreover, after decrease or stop of the groundwater yield from the digging site, the influence circle did not disappear soon, but remained for several days more after the stop of the yield. The groundwater table recovered from upstream as if a flood wave and the center of the influence circle moved downstreem at almost the same rate as the natural velocity of the groundwater flow in the area.
信州大学理学部の論文
1983-07-30