online_velocity_coefficients:   Calculation of velocity distribution coefficients α and β in open-channel flow  Reference Ponce, V. M. 2014. Chapter 2 in Fundamentals of open-channel hydraulics. [Sample input]         [Sample output] INPUT DATA: Units:    SI units (metric) U.S. Customary units    (SI units) [U.S. Customary units] Number of isovels n:    n values of velocity Vi (m/s) [fps] (separate each value with a comma; maximum string length is 300 characters). n values of flow area Ai (m2) [sq. ft.] (separate each value with a comma; maximum string length is 300 characters).

ECHO OF INPUT: Warning: Undefined variable $unitsystems in /var/www/html/ponce/onlinevelocitycoefficients.php on line 299 Warning: Undefined variable $nameunits in /var/www/html/ponce/onlinevelocitycoefficients.php on line 301 Warning: Undefined variable $inisovels in /var/www/html/ponce/onlinevelocitycoefficients.php on line 308 Number of isovels n =   Warning: Undefined variable $unitsystems in /var/www/html/ponce/onlinevelocitycoefficients.php on line 310 Warning: Undefined variable $velocityunits in /var/www/html/ponce/onlinevelocitycoefficients.php on line 312 Velocity V array (): Warning: Undefined variable $inisovels in /var/www/html/ponce/onlinevelocitycoefficients.php on line 320 Warning: Undefined variable $invelocity in /var/www/html/ponce/onlinevelocitycoefficients.php on line 326 Warning: Trying to access array offset on null in /var/www/html/ponce/onlinevelocitycoefficients.php on line 326 V1 =   .    Warning: Undefined variable $unitsystems in /var/www/html/ponce/onlinevelocitycoefficients.php on line 329 Warning: Undefined variable $areaunits in /var/www/html/ponce/onlinevelocitycoefficients.php on line 331 Area A array (): Warning: Undefined variable $inisovels in /var/www/html/ponce/onlinevelocitycoefficients.php on line 339 Warning: Undefined variable $inarea in /var/www/html/ponce/onlinevelocitycoefficients.php on line 345 Warning: Trying to access array offset on null in /var/www/html/ponce/onlinevelocitycoefficients.php on line 345 A1 =   .    OUTPUT: Isovels V A VA V2A V3A

  Your request was processed at  10:47:17 pm on April 3rd, 2025   [ 250403  22:47:17 ].

 

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)