Water quality / ecosystem health / water colour River stage / water surface elevation
Water quality / algal blooms River / channel transmission losses
Water quality / small water bodies River channel / floodplain connectivity
Lake / reservoir / estuary temperature River discharge
Lake volumetric fluctuations Groundwater discharge into river / stream
Floods extent Groundwater recharge
River delta / saline intrusion Groundwater storage
River sediments Groundwater use for irrigation