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--- en:hydro:mulvaney [2016/07/09 21:09] – external edit 127.0.0.1
+++ en:hydro:mulvaney [2024/04/10 10:02] (aktuell) – Externe Bearbeitung 127.0.0.1
@@ Zeile 3: / Zeile 3: @@
 The Mulvaney Equation was proposed by the Irish engineer Thomas James Mulvaney (1822-1892). The equation was first published in 1851. The model predicts the peak discharge $Q$ as a function of an empirical constant $C$, the average rainfall intensity of the catchment $I$ and the area of the catchment $A$:
-$$Q [m^3/s] = C [10^3*86400/10^6] * I [mm/hour] * A [km²]$$
+$$Q [m^3/s] = C \left[\frac{1E+6}{1E+3*3.6E+3}\right] * I \left[\frac{mm}{hour}\right] * A [km^2]$$
-The intensity being given in mm/hour and the area in km², the constant $C$ needs to perform the transformation of units from mm/hour and km² to m³/s. This equation is only valid for small catchments in which storage and losses are not significant.
+The intensity being given in $mm/hour$ and the area in $km^2$, the constant $C$ accounts for the transformation of units from $mm/hour$ and $km^2$ to $m^3/s$. This equation is only valid for small catchments in which storage and losses are not significant! This rather the case in urban (small) catchments:
-This equation in SI units reads:
+This equation in commonly used units reads:
 $$Q_{peak} = 0.278 * C * I * A$$