online_standard_contracted_rectangular:   Discharge through a standard contracted rectangular weir Formula: Q = 3.33 (L - 0.2 H) H3/2          [in U.S. Units] Head H on the weir, in m [or ft] Length L of the weir, in m [or ft] Height P to the weir crest, in m [or ft] Side width b, in m [or ft] Discharge Q  in L/s [or cfs] See USBR Manual for general methodology INPUT DATA:       [Description] Select Units:      SI (metric) U.S. Customary Head H :         Warning: Undefined variable $headunits in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 203 [ H > 0 ] Length L :         Warning: Undefined variable $headunits in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 210 [ L > 0 ] Height P :         Warning: Undefined variable $headunits in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 217 [ H > 0 ] Width b :         Warning: Undefined variable $headunits in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 224 [ b > 0 ] OUTPUT: Warning: Undefined variable $ratiopoh in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 234 Warning: Undefined variable $ratiopoh in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 236 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 236 Warning:  Ratio P/H = 0 < 2. Warning: Undefined variable $ratioboh in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 239 Warning: Undefined variable $ratioboh in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 241 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 241 Warning:  Ratio b/H = 0 < 2. Warning: Undefined variable $ratioloh in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 245 Warning: Undefined variable $ratioloh in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 247 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 247 Warning:  Ratio L/H = 0 ≤ 3. Discharge  Q :   Warning: Undefined variable $discharge in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 255 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 255 0   Warning: Undefined variable $dischargeunits in /var/www/html/ponce/onlinestandardcontractedrectangular.php on line 255   Your request was processed at  04:14:22 am on April 3rd, 2025   [ 250403  04:14:22 ]. Thank you for running   online_standard_contracted_rectangular   Please call again.   [131103]