Hydrological measures and their definition
CODE	Hydrological measure	Definition
GROSS WATER BAlANCE TERMS
MAF	Mean annual flow	Volume (or rate) of river flow during a year (on average)
MAAEL	Mean annual actual evaporation losses	Volume (or rate) of losses to evaporation during a year (on average)
WPAEL	Wet period actual evaporation losses	Volume (or rate) of losses to evaporation during, or in response to, periods of rainfall
DPAEL	Dry period actual evaporation losses	Volume (or rate) of losses to evaporation during periods without rainfall
WPF	Wet period flow	Volume (or rate) of river flow during, or in response to, periods of rainfall
	Dry period flow	See 'DPFV' - Dry period flow volume
GROUNDWATER RECHARGE
AGR	Annual groundwater recharge	Volume of water moving vertically from the wetland into the underlying groundwater system during a year
WPGR	Wet period groundwater recharge	Volume of water moving vertically from the wetland into the underlying groundwater system during, or in response to, periods of rainfall
DPGR	Dry period groundwater recharge	Volume of water moving vertically from the wetland into the underlying groundwater system during periods without rainfall
BASE FLOW AND LOW FLOWS
GDS	Groundwater discharge site	Movement of groundwater into surface water through the wetland
DPFV	Dry period flow volume	Volume of flow during dry periods
DPFD	Dry period flow duration	Duration for which flow is sustained during dry periods
DPRR	Dry period recession rate	Rate of flow recession during periods without rain; a high rate indicates a rapid decrease in flow, a low rate indicates sustained low flows
FLOOD RESPONSE
FPLM	Flood peak of low return period (T <2 years)	Peak flow during a flood event, where the flow is exceeded on average every two years or less
FPHM	Flood peak of high return period (T > 2 years)	Peak flow during a flood event, where the flow is exceeded on average every two years or more
FEV	Flood event volume	Total volume of flow during an individual flood event
FTTP	Flood time-to-peak	Time between the onset and peak of a flood event
FR	Flood recession rate	The recession rate of a flood event
RIVER FLOW VARIABILITY
FVa	Flow variability	Flow variability within the full flow regime
WPFVa	Wet period flow variability	Flow variability during, or in response to, periods with rainfall
DPFVa	Dry period flow variability	Flow variability during periods without rainfall