online_modified_lane:  Calculation of sediment discharge by the Modified Lane relation    Formula: Qs = 58.7 k1 γ Qw So (R/ds)1/3 SI Units (metric):  Qs in M.Tons/day, Qw in m3/s, So in m/m, R in m, and ds in mm. U.S. Customary Units:  Qs in Tons/day, Qw in ft3/s, So in ft/ft, R in ft, and ds in mm. Reference: http://lane.sdsu.edu INPUT DATA: Select:    SI units (metric) U.S. Customary units Parameter k1 :       [Leave blank to choose default k1 = 0.001] Water discharge Qw :       Warning: Undefined variable $waterdischargeunits in /var/www/html/ponce/onlinemodifiedlane.php on line 170 Bottom slope So :       Warning: Undefined variable $bottomslopeunits in /var/www/html/ponce/onlinemodifiedlane.php on line 179 Hydraulic radius R :       Warning: Undefined variable $hydraulicradiusunits in /var/www/html/ponce/onlinemodifiedlane.php on line 188 Particle size ds :       Warning: Undefined variable $particlesizeunits in /var/www/html/ponce/onlinemodifiedlane.php on line 197 OUTPUT: Sediment discharge Qs :    Warning: Undefined variable $sedimentdischarge in /var/www/html/ponce/onlinemodifiedlane.php on line 208 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/ponce/onlinemodifiedlane.php on line 208   Warning: Undefined variable $sedimentdischargeunits in /var/www/html/ponce/onlinemodifiedlane.php on line 208 Press button to or recalculate   Your request was processed at  02:11:45 am on April 3rd, 2025   [ 250403  02:11:45 ]. Thank you for running   online_modified_lane   Please call again.   [151115]