Basin Lag in Rational Method to Estimate the Flood Peak Formulas

Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall. And is denoted by t_p. Basin Lag is usually measured using the Hour for Time. Note that the value of Basin Lag is always positive.

Formulas to find Basin Lag in Rational Method to Estimate the Flood Peak

fxBasin Lag for Mountainous Drainage AreasGo

fxBasin Lag for Foot Hill Drainage AreaGo

fxBasin Lag for Valley Drainage AreasGo

List of variables in Rational Method to Estimate the Flood Peak formulas

fx Basin Length Go

fx Distance along Main Water Course Go

fx Basin Slope Go

FAQ

What is the Basin Lag?

Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall. Basin Lag is usually measured using the Hour for Time. Note that the value of Basin Lag is always positive.

Can the Basin Lag be negative?

No, the Basin Lag, measured in Time cannot be negative.

What unit is used to measure Basin Lag?

Basin Lag is usually measured using the Hour[h] for Time. Second[h], Millisecond[h], Microsecond[h] are the few other units in which Basin Lag can be measured.

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