Terminology

The following terminology is used in MHKiT:

Term	Definition [unit]
\(A_P\)	Projected capture area [m^2]
BS	Bretschneider spectrum
\(D\)	Characteristic length [m]
\(D_E\)	Equivalent diameter [m]
DEL	Damage Equivalent Load
\(E\)	Energy [J]
\(\eta\)	Incident wave [m]
\(f\)	Frequency [Hz]
\(F\)	Exceedance probability [%]
Fr	Froude Number
\(g\)	Gravity [m/s/s]
\(h\)	Water depth from bottom to water surface (e.g. SWL) [m]
\(H\)	Wave height [m]
\(H_{s}\)	Significant wave height, mean wave height of the tallest third of waves [m]
\(H_{m0}\)	Spectrally derived significant wave height [m]
\(J\)	Wave energy flux [W/m]
JS	JONSWAP spectrum
\(L\)	Capture length [m]
\(\lambda_w\)	Wave length [m]
\(k\)	Wave number, \(k = \frac{2\pi}{\lambda_w}\) [rad/m]
KC	Keulegan-Carpenter number
\(m\)	Mass [kg]
\(m_k\)	Spectral moment of k, for k = 0,1,2,…
\(\omega\)	Wave frequency, \(\omega = \frac{2\pi}{T}\) [rad/s]
\(P\)	Power [W]
PM	Pierson-Moskowitz spectrum
\(Q\)	Discharge [m^3/s]
\(\rho\)	Density [kg/m^3]
\(S\)	Spectral density [m^2/Hz]
SWL	Still water line
\(T_{e}\)	Energy period [s]
\(T_{m}\)	Mean wave period [s]
\(T_{p}\)	Peak period [s]
\(T_{z}\)	Zero-crossing period [s]
\(u\)	Voltage [V]
\(v\)	Velocity [m/s]
\(V\)	Velocity calculated for river and tidal modules [m/s]

Units

The methods in MHKiT use the MKS (meters-kilograms-seconds) system, and assume data is stored in SI units, for example: