Which of the following is not a definition of an environmental flow?
a) Water that 'leaks' to the environment as water is delivered to irrigators
b) A flow of water to maintain riparian ecosystems
c) A flow of water to maintain aquatic ecosystems
d) An amount of water left in river, specifically to maintain integrity of the riverine environment
e) An amount of water released from a dam, specifically to maintain integrity of the riverine environment