On the Characteristics of Groundwater Behavior in the Komaki Hill Region

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Groundwater behavior is generally complex because of various influences of many factors which are not only natural phenomena but also artificial impacts. It is necessary for flow estimation of regional groundwater to clarify the relation between various scales of groundwater behavior and its governing factors.<BR>In the present paper, characteristics of unconfined groundwater behavior recharged by rainfall infiltration are discussed. Field observation was carried out in the KOMAKI hill region. In order to investigate the effect of unsaturated zone to variation of groundwater level, physical characteristics of soil water were examined for soil samples.<BR>Through this paper, it has been clarified that variation of the groundwater level in the hill region are consist of the behaviors with two different scales in time and space. The behavior during and just after rainfall is mainly governed by inhomogeneity of the geological characteristics in the region, and the behavior during long-term recession state by hydrogeological structure of aquifer. The phenomenological discussions on mechanism of vertical recharge to unconfined aquifer are also presented.
JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGYの論文