Sunday, October 22, 2023

SWMM5 Emoji - 🌐 General Constants

 

🌐 General Constants

These constants are fundamental values used throughout the program:

Constant NameValueDescriptionEmoji Symbol
VERSION52000Software version.🆔📈
MAGICNUMBER516114522A unique identifier for the software.🎩✨
EOFMARK0x1AEnd-of-file mark. Use 0x04 for UNIX systems.📝🔚
MAXTITLE3Maximum number of title lines.📜🔝
MAXMSG1024Max characters in message text.📝🔝
MAXLINE1024Max characters per input line.📄🔝
MAXFNAME259Max characters in file name.📂🔝
MAXTOKS40Max items per line of input.📊🔝
MAXSTATES10Max number of computed hydraulic variables.🌊🔢
MAXODES4Max number of ODE's to be solved.🧮🔝
NA-1NOT APPLICABLE code.🚫🔢
TRUE1Value for TRUE state.
FALSE0Value for FALSE state.
BIG1.E10Generic large value.📈🔝
TINY1.E-6Generic small value.📉🔝
ZERO1.E-10Effective zero value.0️⃣
MISSING-1.E10Missing value code.❓🔢
PI3.141592654Value of pi.π
GRAVITY32.2Acceleration of gravity in US units.🌍⬇️
SI_GRAVITY9.81Acceleration of gravity in SI units.🌍⬇️📏

🚰 Hydraulic Constants

These constants pertain to hydrological and hydraulic calculations:

Constant NameValueDescriptionEmoji Symbol
PHI1.486Units factor in Manning Equation.🌊📏
MIN_RUNOFF_FLOW0.001Minimal measurable runoff flow in cfs.💧🔍
MIN_TOTAL_DEPTH0.004167Minimal total depth in feet (0.05 inches).🌊🔍
FLOW_TOL0.00001Minimum flow for steady state in cfs.🛤️🔍
FUDGE0.0001Minimum flow depth and area in ft or ft2.🌊📊

🔄 Conversion Factors

These constants are used to convert values between different units:

Constant NameValueDescriptionEmoji Symbol
GPMperCFS448.831Gallons per minute per cubic foot per second.🚰🔄
AFDperCFS1.9837Acre-feet per day per cfs.🌊🔄
MGDperCFS0.64632Million gallons per day per cfs.🚰📈
IMGDperCFS0.5382Imperial million gallons per day per cfs.🚰🇬🇧
LPSperCFS28.317Liters per second per cfs.💧🔄
LPMperCFS1699.0Liters per minute per cfs.💧🕒
CMHperCFS101.94Cubic meters per hour per cfs.🌊🕒
CMDperCFS2446.6Cubic meters per day per cfs.🌊📅
MLDperCFS2.4466Million liters per day per cfs.💧📈
M3perFT30.028317Cubic meters per cubic foot.📏🔄
LperFT328.317Liters per cubic foot.💧📏
MperFT0.3048Meters per foot.📏🔄
PSIperFT0.4333Pounds per square inch per foot.💪📏
KPAperPSI6.895Kilopascals per psi.💪🔄
KWperHP0.7457Kilowatts per horsepower.⚡🔄

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