The diagram illustrate the lifecyle of rainwater and the process of how collected in an Austrain town.
overall, the rainwater that has been collected in gutter on the top roof side of the house passes through drainer that has been attacted on the edge of house,once water concentraced on stage ,there was the pipe that went underground until tanker called storage to purify the impurities and other residual ,on further process there was chamber of water treament until water went back to houses for human consumption.
in addition,there were three main process ,filteration where water that has been collected gutter was filtered,onather chain process was the purification method that took place water treatment section,it has been addd chemical in order to fit water for human usage, on other hand there where storage section for distallation until drainage went down other section, these were a inter-connected process which makes water drainage of an austrian town