online_engelund_hansen:  Calculation of sediment discharge by the Engelund-Hansen formula    Formulas: Ss = γs / γw θ = D So / [ (Ss - 1 ) d50 ] f = ( 2 g So D ) / V 2 qs = 0.1 (1/f ) θ5/2 γw [ (Ss - 1 ) g d503 ]1/2 Qs = B qs Reference:  SCS National Engineering Handbook, Section 3, Sedimentation, Chapter 4: Transmission of Sediment by Water. SI Units (metric):   Hydraulic depth D in m; channel width B in m; mean velocity V in m/s; bottom slope So in m/m; mean diameter d50 in mm; Ss is dimensionless. U.S. Customary Units:   Hydraulic depth D in ft; channel width B in ft; mean velocity V in fps; bottom slope So in ft/ft; mean diameter d50 in mm; Ss is dimensionless. INPUT DATA: Select:    SI units (metric) U.S. Customary units Hydraulic depth D :         Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlineengelundhansen.php on line 223 Channel width B :           Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlineengelundhansen.php on line 232 Mean velocity V :            Warning: Undefined variable $velocityunits in /var/www/html/ponce/onlineengelundhansen.php on line 241 Bottom slope So :           Warning: Undefined variable $slopeunits in /var/www/html/ponce/onlineengelundhansen.php on line 250 Mean diameter d50 :       Warning: Undefined variable $diameterunits in /var/www/html/ponce/onlineengelundhansen.php on line 259 Specific gravity Ss :        Warning: Undefined variable $specificgravityunits in /var/www/html/ponce/onlineengelundhansen.php on line 268 [ Leave blank to choose default Ss = 2.68 ] OUTPUT: Sediment discharge (sec) qs :    Warning: Undefined variable $sedimentdischargeu in /var/www/html/ponce/onlineengelundhansen.php on line 283 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/ponce/onlineengelundhansen.php on line 283   Warning: Undefined variable $sedimentdischargeuunits in /var/www/html/ponce/onlineengelundhansen.php on line 283 Sediment discharge (sec) Qs :    Warning: Undefined variable $sedimentdischarge in /var/www/html/ponce/onlineengelundhansen.php on line 284 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/ponce/onlineengelundhansen.php on line 284   Warning: Undefined variable $sedimentdischargeunits in /var/www/html/ponce/onlineengelundhansen.php on line 284 Sediment discharge (days) qs :    Warning: Undefined variable $sedimentdischargeudays in /var/www/html/ponce/onlineengelundhansen.php on line 287 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/ponce/onlineengelundhansen.php on line 287   Warning: Undefined variable $sedimentdischargeudaysunits in /var/www/html/ponce/onlineengelundhansen.php on line 287 Sediment discharge (days) Qs :    Warning: Undefined variable $sedimentdischargedays in /var/www/html/ponce/onlineengelundhansen.php on line 288 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/ponce/onlineengelundhansen.php on line 288   Warning: Undefined variable $sedimentdischargedaysunits in /var/www/html/ponce/onlineengelundhansen.php on line 288 Press button to or recalculate   Your request was processed at  04:48:01 pm on April 5th, 2025   [ 250405  16:48:01 ]. Thank you for running   online_engelund_hansen   Please call again.   [121029]