eflowcalc.mh19

eflowcalc.mh19(flows, datetimes, hydro_years, drainage_area)

Skewness in annual maximum daily flow.

Calculation Details

Compute the maximum daily flow for each hydrological year in the record. Calculate the skewness using the following equation:

N**2 * Σ(log(Q)) - 3 * N * Σ(log(Q)) * Σ(log(Q)**2) + 2 * Σ(log(Q)**3)
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                 N * (N-1) * (N-2) * (σ(log(Q)))**3

where N is the number of years in the record, Q is the vector of annual maxima, log in the decimal logarithm, Σ is the arithmetic sum, and σ is the standard deviation.