66 M.C. Miller etal. 



E 

 o 



0) 



> 



10 

 8 

 6 

 4 



2 





 -2 

 -4 

 -6 



E 

 o 



0) 



> 







FIGURE 3-8. Water levels 

 in ponds, 1971 to 1973. 



