The relationship between porosity (η), specific yield (Sy) and specific retention (Sr) of an unconfined aquifer is:

The relationship between porosity (η), specific yield (Sy) and specif

1.	The relationship between porosity (η), specific yield (Sy) and specific retention (Sr) of an unconfined aquifer is:
A.	\({S_y} + {S_r} = \eta \)
B.	\({S_y} + \eta = {S_r}\)
C.	\({S_r} + \eta = {S_y}\)
D.	\({S_y} + {S_r} + \eta = 1\)
Answer» B. \({S_y} + \eta = {S_r}\)