New South Wales Consolidated Regulations

WATER SHARING PLAN FOR THE KARUAH RIVER WATER SOURCE 2003 - REG 17

17 Flow classes

(1) This Plan establishes the following flow classes as the basis for sharing of daily flows:

(a) very low flow class at or less than 5 megalitres per day (hereafter "ML/day") on a rising river and at or less than 3.5 ML/day on a falling river,

Note: The 3.5 ML/day in subclause (a) corresponds to the estimated 88th percentile for all days of record in December, the critical month, and is referred to as the cease to pump on a falling river. The 5 ML/day corresponds to the 86th percentile for all days of record in December, and is referred to as the commence to pump on a rising river.

(b) A class flows greater than 5 ML/day and at or less than 18 ML/day on a rising river, and greater than 3.5 ML/day and at or less than 18 ML/day on a falling river,

(c) B class flows greater than 18 ML/day and at or less than 87 ML/day, and

(d) C class flows greater than 87 ML/day.

Note: The flow classes have been determined based on flow information that inherently includes seasonal effects as well as evaporation and seepage losses.

(2) Notwithstanding subclause (1), when planned environmental water provisions are activated, the very low flow class thresholds and the bottom of A class will increase to such an extent to satisfy the planned environmental water in accordance with clause 23.