Circular channel Square channel deq/D ub (m/s) deq/D ub (m/s) 0.781610531 0.045015194 0.876821648 0.049278204 0.896489859 0.03302831 0.893168153 0.045879022 0.91022513 0.016818979 0.894212032 0.045562311 0.925546472 0.01895665 0.898367224 0.044767223 0.92825689 0.018997321 0.904089561 0.042975066 0.939953002 0.019933395 0.921849216 0.041308069 0.946291539 0.018534131 0.983244847 0.032732993 0.949726698 0.017232015 0.986514995 0.032333644 0.988980829 0.0141176 0.995533836 0.031120754 1.018269084 0.011734848 1.007827665 0.029988094 1.021827282 0.011262175 1.016561544 0.030931208 1.02733402 0.011124567 1.024292801 0.028607321 1.02956123 0.00731347 1.025120746 0.069608707 1.037240818 0.009739844 1.0259203 0.028510643 1.092646462 0.00217497 1.036814393 0.027330246 1.110373816 0.004212121 1.060547634 0.026378507 1.132549355 0.003758624 1.063683882 0.025315448 1.14361732 0.004162598 1.078108772 0.023912611 1.149782741 0.00448228 1.08770784 0.023402142 1.158492698 0.005002789 1.105526814 0.022424329 1.185858714 0.006921508 1.105747813 0.022390431 1.202432173 0.008519703 1.110625497 0.022035811 1.205315182 0.008673116 1.117867334 0.022953852 1.226522257 0.009129141 1.122054644 0.022982736 1.23281455 0.00909416 1.143218756 0.020554749 1.240808108 0.010671071 1.145398654 0.020400304 1.245717419 0.008522232 1.163526203 0.019831467 1.252016198 0.008263663 1.167281594 0.019853531 1.262214597 0.011152384 1.178191019 0.019679631 1.303679975 0.006736906 1.196642151 0.019070678 1.376933681 0.006754608 1.218851074 0.01871325 1.381309949 0.006816142 1.221596467 0.020862635 1.392184134 0.006952064 1.223627688 0.018610554 1.393135795 0.006891373 1.224654496 0.018529521 1.402170151 0.006921719 1.231933371 0.018586685 1.41739347 0.006992946 1.243653705 0.019302545 1.418928723 0.006858499 1.254903164 0.016942755 1.430028483 0.006926565 1.267679832 0.018692791 1.431170298 0.006984728 1.275927136 0.018813338 1.461828413 0.006926987 1.27595802 0.019149104 1.475992998 0.006981567 1.304367285 0.019318993 1.480112224 0.006944267 1.328492021 0.018862078 1.519580147 0.006999268 1.33565935 0.020158609 1.535980842 0.00700559 1.37617654 0.021442102 1.554881714 0.007004536 1.385708103 0.021338003 1.567497967 0.007003483 1.409040987 0.022079737 1.57686816 0.007002429 1.432191622 0.022009936 1.581443754 0.007001375 1.440032463 0.021942743 1.459922483 0.021674571 1.540710078 0.021230493 1.569465216 0.021217857 1.569902281 0.021283847 1.579252736 0.02135445 1.592192459 0.021305309 1.615815271 0.021354851 1.626080373 0.021308117 1.685850432 0.021246539 1.785990443 0.021345223 1.876815535 0.021321555 1.956769289 0.02134061