Abstract:
The study was conducted at Gezira scheme, Gezira state and
Sudan University of science and technology, college of agricultural
studies, Shambat (August 2013), to estimate the volume of deposited
silt in Gezira and Managil main canals and calculated the cost of silt
removal at current price.
The independent computer model for estimation of silt deposits
volume and desiliting costs was designed and written in visual basic 6
programming languages.
The computer model has many interfaces:-
The main computer model interface, input data interface which
includes two surfaces:
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Design input data include, design depth, bed width, top width,
roughness coefficient, canal side slope and canal bed slope.
The survey input data include the actual canal width; reach length,
depth readings and cost of silt removal for a cubic meter.
The output data interfaces include three types: design output
data, canal discharge, flow speed, hydraulic radius, cross section area
and canal reach volume.
Field survey output data include two type data: canal cross
sectional area and canal reach volume.
The computer model output data that includes: canal reach
deposited volume in cubic meters and cost of silt removal in the reach.
The computer model algorithm is designed to calculate the
volume of silt deposited in the canal in digital form and the calculation
of total cost of silt removal from canal.
The comparison between computer model calculated silt
adiposities in the two canals and the silt adiposities estimated as in the
HRS report (1997) shows that there is no significant difference between
the two values as analyzed by SPSS statistical analyses computer
model it is also showed that there a strong correlation (0.999) between
results .
