The reviews of Einstein's equation of logarithmic distribution platform and the process of changes in the speed range of the Karkheh river, Khuzestan province, Iran

In this study in order to evaluate the accuracy of the equation and its coefficient variation in addition to obtain flow characteristics in six sections and estimates of geometric parameters using the SPSS software HEC-RAS 4, sampled in many points of bed soil and were used in analysis. Results showed that the bed was rough and this roughness was only a function of the high slope of waterway and velocity gradient predicted by equation has good agreement with obtained gradient. High slope of this gradient near bed represents instability of bed and sediment analysis performed by the software HEC-RAS 4 also confirmed upstream erosion.