onlinechannel05.php:   Normal and critical depth in a prismatic channel Definition sketch for a prismatic channel Normal depth formulas A = y(b + zy) P = b + 2y(1 + z2)1/2 T = b + 2zy R = A/P D = A/T Q = (k/n) AR2/3S1/2 V = Q/A F = V/(gD)1/2     Critical depth formulas F2 = (Q2T)/(gA3) F = 1 (Q2/g)T - A3 = 0 A = y(b + zy) T = b + 2zy V = Q/A D= A/T INPUT DATA: Select:    SI units (metric) U.S. Customary units Flow discharge Q:   Warning: Undefined variable $dischargeunits in /var/www/html/ponce/onlinechannel05.php on line 409 Bottom width b:   Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 417 Side slope z:   Bottom slope S:   Manning's n:   INTERMEDIATE CALCS (normal depth): Units selected:    Warning: Undefined variable $unitsystemsname in /var/www/html/ponce/onlinechannel05.php on line 444 Gravitational acceleration g:    Warning: Undefined variable $g in /var/www/html/ponce/onlinechannel05.php on line 445 Warning: Undefined variable $accelerationunits in /var/www/html/ponce/onlinechannel05.php on line 445 Units constant k:    Warning: Undefined variable $c in /var/www/html/ponce/onlinechannel05.php on line 446 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 446 0 Flow area An:    Warning: Undefined variable $an in /var/www/html/ponce/onlinechannel05.php on line 447 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 447 0 Warning: Undefined variable $areaunits in /var/www/html/ponce/onlinechannel05.php on line 447 Wetted perimeter Pn:    Warning: Undefined variable $pn in /var/www/html/ponce/onlinechannel05.php on line 448 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 448 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 448 Top width Tn:    Warning: Undefined variable $tn in /var/www/html/ponce/onlinechannel05.php on line 449 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 449 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 449 Hydraulic radius Rn:    Warning: Undefined variable $rn in /var/www/html/ponce/onlinechannel05.php on line 451 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 451 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 451 Hydraulic depth Dn:    Warning: Undefined variable $dn in /var/www/html/ponce/onlinechannel05.php on line 452 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 452 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 452 OUTPUT (normal depth): Depth yn:    Warning: Undefined variable $yn in /var/www/html/ponce/onlinechannel05.php on line 460 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 460 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 460 Velocity Vn:    Warning: Undefined variable $vn in /var/www/html/ponce/onlinechannel05.php on line 461 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 461 0 Warning: Undefined variable $velocityunits in /var/www/html/ponce/onlinechannel05.php on line 461 Froude number Fn:    Warning: Undefined variable $fn in /var/www/html/ponce/onlinechannel05.php on line 462 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 462 0 INTERMEDIATE CALCS (critical depth): Units selected:    Warning: Undefined variable $unitsystemsname in /var/www/html/ponce/onlinechannel05.php on line 467 Gravitational acceleration g:    Warning: Undefined variable $g in /var/www/html/ponce/onlinechannel05.php on line 468 Warning: Undefined variable $accelerationunits in /var/www/html/ponce/onlinechannel05.php on line 468 Flow area Ac:    Warning: Undefined variable $ac in /var/www/html/ponce/onlinechannel05.php on line 469 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 469 0 Warning: Undefined variable $areaunits in /var/www/html/ponce/onlinechannel05.php on line 469 Wetted perimeter Pc:    Warning: Undefined variable $pc in /var/www/html/ponce/onlinechannel05.php on line 471 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 471 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 471 Top width Tc:    Warning: Undefined variable $tc in /var/www/html/ponce/onlinechannel05.php on line 472 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 472 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 472 Hydraulic radius Rc:    Warning: Undefined variable $rc in /var/www/html/ponce/onlinechannel05.php on line 475 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 475 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 475 Hydraulic depth Dc:    Warning: Undefined variable $dc in /var/www/html/ponce/onlinechannel05.php on line 478 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 478 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 478 OUTPUT (critical depth): Depth yc:    Warning: Undefined variable $yc in /var/www/html/ponce/onlinechannel05.php on line 482 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 482 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel05.php on line 482 Velocity Vc:    Warning: Undefined variable $vc in /var/www/html/ponce/onlinechannel05.php on line 483 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 483 0 Warning: Undefined variable $velocityunits in /var/www/html/ponce/onlinechannel05.php on line 483 Froude number Fc:    Warning: Undefined variable $fc in /var/www/html/ponce/onlinechannel05.php on line 484 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel05.php on line 484 0   Your request was processed at  04:26:54 am on April 3rd, 2025   [ 250403  04:26:54 ]. 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online calc
normal depth	critical depth	normal and critical depth		discharge in channel	critical slope
normal depth in culvert	critical depth in culvert	discharge in culvert		discharge sluice	discharge weir
M1 wsprofile	M2 wsprofile	M3 wsprofile	S1 wsprofile	S2 wsprofile	S3 wsprofile
C1 wsprofile	H2 wsprofile	A2 wsprofile	C3 wsprofile	H3 wsprofile	A3 wsprofile
sequent depth HJ	energy loss HJ	initial sequent HJ	efficiency HJ	critical width constriction
ogee spillway	Hazen-Williams	parallel pipes	three reservoirs	tractive force
V-notch weir	V-notch partially contracted	Cipolletti weir	Rectangular weir	Standard contracted rectangular weir	Standard suppressed rectangular weir
Froude number		Vedernikov number		Limiting contracting ratio
Creager	rational	slope-area	linear reservoir	storage indication 1	storage indication 2
Muskingum	Muskingum-Cunge	time-area	Clark UH	Cascade of linear reservoirs
USGS Methods for magnitude of floods in California	Kinematic wave applicability	Diffusion wave applicability	Clark's unit hydrography compared to Ponce's version	Correlation coefficient of a joint probability distribution	Storage volume of a detention basin
Blaney-Criddle	Penman	Penman-Monteith reference crop	Thornthwaite	Priestley-Taylor	Penman-Monteith ecosystems
Gumbel	Gumbel 2	Log Pearson	Log Pearson 2	TR-55 graphical	curve number
Overland flow using the diffusion wave method	Dynamic hydraulic diffusivity	convolution	S-hydrograph	time of concentration	water balance
UH cascade	dimensionless UH cascade		general UH cascade	series UH cascade	all series UH cascade
one-predictor linear	one-predictor nonlinear	two-predictor linear	two-predictor nonlinear	hyperbolic regression
fall velocity	Lane & Koelzer	USLE	USLE2	Dendy-Bolton	Shields
Duboys	Meyer-Peter	Colby 1957	Colby	reservoir design life	Equilibrium channel top width using the Lane et al. theory
Modified Einstein Procedure		bridge scour using Melville equation
DO sag	DO sag analysis		Oxygenation	Salinity (EC to TDS)