InvIdra (not expiring license)

Assessment of the design rainfall by a 2-parameter or a 3-parameter IDF curve.
Constant rainfall
Chicago hyetograph
Sifalda hyetograph
Design of impervious detention basins:
simplified method;
rational method;
direct rainfall method;
reservoir method;
sizing of the discharge pipe and estimating the area of the basin.
Sizing of green lowered surfaces:
rational method;
direct rainfall method;
potential infiltration ratio by Green & Ampt method.
Sizing of draining trenches:
rational method;
direct rainfall method;
potential infiltration ratio by Green & Ampt method.
Sizing of infiltration wells:
constant surface runoff;
variable surface runoff;
calculating the minimum volume of the wells by Sieker formula.

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