The reservoir's watershed is 60 square km and the area flooded is 13 hectares but by the middle of the dry season most of the water has infiltrated or evaporated.
(the area; flooded; ) (most of the water; has infiltrated; T:by the middle of the dry season) (most of the water; evaporated; T:by the middle of the dry season)
the area most of the water most of the water
flooded has infiltrated evaporated
T:by the middle of the dry season
T:by the middle of the dry season