Abstract:
This study was carried out with objectives of developing
a proper decision aid for irrigation indenting of multiple crop
rotation based on Penman- Montieth equation( 1994) and
amenable for the format of meteorological data of the Sudan.
Consequently the study developed a mathematical simulation
of canal operation for the purpose of optimization of water
allocation within such a canal.
Linear programming algorithm was made to optimize irrigation
water allocation between different outlets in the irrigation canal
under the constraints of fixed canal capacity and irrigation
interval.
The model was coded in a personal computer using Excel –
visual basic application language (VBA ).
These models were verified statistically in comparison with
published models. Both water indent and allocation modules
were applied to the real cases of wet and dry regions of Gezira
Scheme – Sudan. The modules were applied to estimate water
indent and for sequencing canal outlets for the cases of early
and peak season at Sunni Minor canal and Ugud Minor canal.
The model sensitivity to changes in outlet - inflow rate
( working time per outlet ) was made for the said two cases to
XII
conclude the developed model capabilities to optimize water
scheduling and allocation process which can be used to save
irrigation water during early stages and to upgrade the
operation of minor canals in the irrigated schemes in the
Sudan.
XIII
