Dear Friends

I'd like know an opinion concerns the problem of the accumulation (in urban 
drainage), and in specific manner, in the case in which I should simulate a 
single event, that however is characterized from different peaks of 
intensity, separate from intervals, also fairly long (different hours), in 
which the intensity of rain is very low: I 've thought about to consider the 
portions of hyetograph near to the peaks, or however the portions having 
notable intensity, like single events, but separate between them from 
intervals of dry time, that would be the portions of hyetograph with low 
intensity;  I retain that in the aforesaid intervals, the accumulation 
doesn't vary in an analogous way to that of really dry time . In a first 
time I've though it would be been able to calculate: the dry time (in days) 
between a event and the following, the residual mass at the end of the 
preceding event, Mr and with the equation of Huber& Dickinson (1988),

Ma= Accu/Disp*A*Perm*(1-e^(-Disp*t/24))+Mr*e(-Disp*t/24)


calculate the mass available to the washoff to the beginning of the current 
event, Ma ( probably the same identical thing could become in the case of 
continuous simulation ).
In a second time I've considered that between an event and the following 
there isn't an effective dry period, but there is a  ( little ) rain, so, I 
think, could be modified what I've write above ? And in which way ?

Thank you very much
Costanza

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