He highlighted the two
depressions, one in the centre and the other in the southeast
corner. From Figures 3(a) and 3(b) it is found that there
are two depressions within the Moyna basin and the nearmiddle
one is much larger as well as wide extended.
Within
Moyna basin relief varies from one to 15m (Figure 3(a)).
Maximum areas have elevation within three m (Figure 3(b)).
From the outer riverine embankments toward centre the
basin gets deep gradually; it is marked as negative slope for
the purpose of water discharging from the basin.