33 



YEAR 

 -E- 1940 1944 1948 1952 1956 1960 1964 1968 



o 



gio 



UJ 



DC 

 UJ 



20 



S30 

 O 



QC 

 O 





a) 



< ^ 



10 



u-O 



ccm 

 ID 20 



b) 



Fig. 3.4. Monthly Record of a) Groundwater Level and b) Rate of Subsidence 

 in Osaka, Japan (after Murayama, 1970). 



