1. A method of determining the effect of precipitation on flow within a sewer network, comprising: collecting data representative of a measured rain quantity over a first time interval at a first location, wherein the first time interval has a duration that is less than a twenty-four-hour period; maintaining, in a memory, data representative of a modeled rain response at a second location over a second time interval, the second time interval having a duration that is longer than the duration of the first time interval; calculating, in real time, a scaled rain response, the scaled rain response comprising a function of the modeled rain response and the measured rain quantity; and reporting, in real time, the scaled rain response.