Reported @MitchHeineman
Copied from USEPA/Stormwater-Management-Model#70
Very minor stuff: a few constants are applied inconsistently and/or could easily be resolved to higher precision. The gravity adjustment is less than 0.1%; the Manning's N coefficient adjustment is close to 0.3%
//consts.h
#define GRAVITY 32.2 // add precision to 32.174
#define SI_GRAVITY 9.81 // never used
#define PHI 1.486 // resolve to 1.4859 or exact representation as 0.3048^(-1/3)
//lid.c
LidProcs[j].surface.alpha =1.49 * sqrt(LidProcs[j].surface.surfSlope) / LidProcs[j].surface.roughness; // use PHI
Reported @MitchHeineman
Copied from USEPA/Stormwater-Management-Model#70
Very minor stuff: a few constants are applied inconsistently and/or could easily be resolved to higher precision. The gravity adjustment is less than 0.1%; the Manning's N coefficient adjustment is close to 0.3%
//consts.h
#define GRAVITY 32.2 // add precision to 32.174
#define SI_GRAVITY 9.81 // never used
#define PHI 1.486 // resolve to 1.4859 or exact representation as 0.3048^(-1/3)
//lid.c
LidProcs[j].surface.alpha =1.49 * sqrt(LidProcs[j].surface.surfSlope) / LidProcs[j].surface.roughness; // use PHI