Z. KATAMBARA ET AL.
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many hydraulic structures within the catchment and be-
yond should incorporate stream flow measuring facilities.
6. Conclusion and Recommendation
Following the response by the government of Tanzania
in addressing food security and poverty alleviation in
Naming’ongo area in Mbozi District, is by developing
Naming’ongo irrigation scheme as well as construction
of bridges across River Nkana that connects the farms
and other parts of the district to facilitate a reliable
transportation of the farm produce. The Australian Water
Balance Model that was calibrated by using 10 years
hydrological and meteorological data from a nearby
sub-catchment of Mbarali, and the calibrated model was
then applied to simulate the flows in River Nkana. The
study approximated the average peak flows in River
Nkana for a return period of 50 years to be just above
560 m3/s. This discharge level was considered to be ade-
quate for the proposed structure. The study recommends
that the human activities including deforestation and cul-
tivation should incorporate soil and environmental con-
servation. While it is necessary to establish a monitoring
system within the catchment, the designs of future intake
structures should incorporate stream flow measuring fa-
cilities.
7. Acknowledgements
The authors acknowledge the support received from the
Mbeya University of Science and Technology. Com-
ments received are also acknowledged.
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