swr_depstor Subroutine

subroutine swr_depstor()

Uses

  • proc~~swr_depstor~~UsesGraph proc~swr_depstor swr_depstor module~hru_module hru_module proc~swr_depstor->module~hru_module module~organic_mineral_mass_module organic_mineral_mass_module proc~swr_depstor->module~organic_mineral_mass_module module~soil_module soil_module proc~swr_depstor->module~soil_module module~carbon_module carbon_module module~organic_mineral_mass_module->module~carbon_module module~soil_module->module~carbon_module

~ ~ ~ PURPOSE ~ ~ ~ this subroutine computes maximum surface depressional storage depth based on
random and oriented roughness and slope steepness

~ ~ ~ INCOMING VARIABLES ~ ~ ~ name |units |definition ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ iop(:,:,:) |julian date |date of tillage operation mgt_op |none |operation code number ranrns_hru(:)|mm |random roughness for a given HRU sol_ori(:) |mm |oriented roughness (ridges) at time of a given tillage operation usle_ei |100(ft-tn in)/(acre-hr)|USLE rainfall erosion index ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ OUTGOING VARIABLES ~ ~ ~ name |units |definition ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ stmaxd(:) |mm |maximum surface depressional storage for day in a given HRU
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ LOCAL DEFINITIONS ~ ~ ~ name |units |definition ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ cumei(:) |Mjmm/hahr |cumulative USLE rainfall erosion index since last |tillage operation cumrt(:) |mm H2O |cumulative rainfall since last tillage operation ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ SUBROUTINES/FUNCTIONS CALLED ~ ~ ~ Intrinsic:exp SWAT:eiusle

~ ~ ~ ~ ~ ~ END SPECIFICATIONS ~ ~ ~ ~ ~ ~

Calculate current cummulative erosivity and rainfall Calculate the decay factor df based on %clay and %organic matter or %organic carbon Determine the current random and oriented roughness using cumei and cumrt and initial random and oriented roughness values

Compute the current maximum depressional storage using percent slope steepness and current random and oriented roughness values determined above

Arguments

None