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Awareness of depth distribution of velocity in open channels is very important in studies of the flow of rivers and canals. Nowadays, many researchers use Logarithmic distribution equation for measuring the velocity-depth distribution. This equation isn’t accurate estimate to flow velocity. The research provides the main Statistical Indicators and develops Analysis of the full equations and Logarithmic distribution equation. These equations contain power distribution, Logarithmic distribution, modified Logarithmic distribution, wake distribution and share distribution. Each of the equations is used Reliable experimental data’s like (Vanoni,1946), (Einstein and Chien,1955), for the accuracy of each equation. The calculation illustrated that wake distribution is accurately estimate the speed values both internal and external eras and recommended this equation. In the other hand, share distribution was the low accuracy estimate and will create large errors Calculation. .

Compare and Evaluate Equations in Velocity-Depth Distribution of Open Channels