soil_phys_init Subroutine

subroutine soil_phys_init(isol)

~ ~ ~ PURPOSE ~ ~ ~ this subroutine initializes soil physical properties

~ ~ ~ INCOMING VARIABLES ~ ~ ~ name |units |definition ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ddrain(:) |mm |depth to the sub-surface drain i |none |HRU number rock(:) |% |percent of rock fragments in soil layer ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ OUTGOING VARIABLES ~ ~ ~ name |units |definition ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ rock(:) |none |exponential value that is a function of |percent rock sol_st(:,:) |mm H2O |amount of water stored in the soil layer |on any given day (less wp water) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ SUBROUTINES/FUNCTIONS CALLED ~ ~ ~ Intrinsic: Exp, Sqrt SWAT: Curno

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

Defaults for ph and calcium mjw average of 20,000 SSURGO soils mjw rev 490 calculate water content of soil at -1.5 MPa and -0.033 MPa compute drainable porosity and variable water table factor - Daniel determine detached sediment size distribution typical for mid-western soils in USA (Foster et al., 1980) Based on SWRRB Sand fraction Silt fraction Clay fraction
Small aggregate fraction
Large Aggregate fraction

Error check. May happen for soils with more sand Soil not typical of mid-western USA The fraction wont add upto 1.0 initialize water/drainage coefs for each soil layer initialize water table depth and soil water for Daniel calculate infiltration parameters for subdaily time step

Arguments