Abstract
The relations between the quality of groundwater and strata of the the three great Diluvial teraces at the easternside of the Hlkkaido Districts is here reported. Their results can be summarized as follows.
(1) The chracter of volcanic origin deposits is indicated in the quality of all groundwater in the studied area, as shown in the key diagram (3) division.
(2) The better quality of groundwater is shown in the higher terrace.
(3) The groundwater of II (Kunneppu) Terrace has both the quality of groundwater of I (Oribe) and III (Memanbetsu) Terrace.
(4) The quality of groundwater has relation to the hight of terrace, the distance from shore to terrace and related strata.
