onlinechannel04.php:   Critical slope in a prismatic channel Definition sketch for a prismatic channel Formulas Q = (k/n) AR2/3S1/2 A = y(b + zy) P = b + 2y(1 + z2)1/2 T = b + 2zy R = A/P D = A/T V = Q/A F = V/(gD)1/2 Sc = gn2(Pc/Tc)/(k2Rc1/3) INPUT DATA: Select:    SI units (metric) U.S. Customary units Flow discharge Q:   Warning: Undefined variable $dischargeunits in /var/www/html/ponce/onlinechannel04.php on line 396 Bottom width b:   Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 404 Side slope z:   Warning: Undefined variable $slopeunits in /var/www/html/ponce/onlinechannel04.php on line 412 Bottom slope S:   Warning: Undefined variable $slopeunits in /var/www/html/ponce/onlinechannel04.php on line 420 Manning's n:   INTERMEDIATE CALCS: Normal flow depth yn:    Warning: Undefined variable $yn in /var/www/html/ponce/onlinechannel04.php on line 435 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 435 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 435 Normal flow area An:    Warning: Undefined variable $an in /var/www/html/ponce/onlinechannel04.php on line 436 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 436 0 Warning: Undefined variable $areaunits in /var/www/html/ponce/onlinechannel04.php on line 436 Normal wetted perimeter Pn:    Warning: Undefined variable $pn in /var/www/html/ponce/onlinechannel04.php on line 437 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 437 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 437 Normal top width Tn:    Warning: Undefined variable $tn in /var/www/html/ponce/onlinechannel04.php on line 438 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 438 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 438 Normal hydraulic radius Rn:    Warning: Undefined variable $rn in /var/www/html/ponce/onlinechannel04.php on line 439 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 439 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 439 Normal hydraulic depth Dn:    Warning: Undefined variable $dn in /var/www/html/ponce/onlinechannel04.php on line 440 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 440 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 440 Normal flow velocity Vn:    Warning: Undefined variable $vn in /var/www/html/ponce/onlinechannel04.php on line 441 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 441 0 Warning: Undefined variable $velocityunits in /var/www/html/ponce/onlinechannel04.php on line 441 Normal Froude number Fn:    Warning: Undefined variable $fn in /var/www/html/ponce/onlinechannel04.php on line 442 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 442 0 Units constant k:    Warning: Undefined variable $c in /var/www/html/ponce/onlinechannel04.php on line 443 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 443 0 Gravitational acceleration g:    Warning: Undefined variable $g in /var/www/html/ponce/onlinechannel04.php on line 444 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 444 0 Warning: Undefined variable $accelerationunits in /var/www/html/ponce/onlinechannel04.php on line 444 OUTPUT: Critical flow depth yc:    Warning: Undefined variable $yc in /var/www/html/ponce/onlinechannel04.php on line 448 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 448 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 448 Critical flow area Ac:    Warning: Undefined variable $ac in /var/www/html/ponce/onlinechannel04.php on line 449 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 449 0 Warning: Undefined variable $areaunits in /var/www/html/ponce/onlinechannel04.php on line 449 Critical wetted perimeter Pc:    Warning: Undefined variable $pc in /var/www/html/ponce/onlinechannel04.php on line 450 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 450 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 450 Critical top width Tc:    Warning: Undefined variable $tc in /var/www/html/ponce/onlinechannel04.php on line 452 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 452 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 452 Critical hydraulic radius Rc:    Warning: Undefined variable $rc in /var/www/html/ponce/onlinechannel04.php on line 453 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 453 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 453 Critical hydraulic depth Dc:    Warning: Undefined variable $dc in /var/www/html/ponce/onlinechannel04.php on line 455 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 455 0 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel04.php on line 455 Critical flow velocity Vc:    Warning: Undefined variable $vc in /var/www/html/ponce/onlinechannel04.php on line 456 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 456 0 Warning: Undefined variable $velocityunits in /var/www/html/ponce/onlinechannel04.php on line 456 Critical Froude number Fc:    Warning: Undefined variable $fc in /var/www/html/ponce/onlinechannel04.php on line 457 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 457 0 Critical slope Sc:    Warning: Undefined variable $criticalslope in /var/www/html/ponce/onlinechannel04.php on line 458 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinechannel04.php on line 458 0 Warning: Undefined variable $slopeunits in /var/www/html/ponce/onlinechannel04.php on line 458   Your request was processed at  04:26:53 am on April 3rd, 2025   [ 250403  04:26:53 ]. 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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)