The internal renewable water resources figures are the only water resources figures that can be added up for regional assessment and they have been used for this purpose.
(The internal renewable water resources figures; are; the only water resources figures that can be added up for regional assessment and they have been used for this purpose) (the only water resources figures; can be added up; T:for regional assessment) (they; have been used; for this purpose)
The internal renewable water resources figures the only water resources figures they
are can be added up have been used
the only water resources figures that can be added up for regional assessment and they have been used for this purpose
T:for regional assessment
for this purpose