New South Wales Consolidated Regulations

WATER SHARING PLAN FOR THE TARCUTTA CREEK 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) in the Borambola management zone:

(i) very low flow class at or less than 16 megalitres per day (hereafter "ML/day") on a rising river and at or less than 13 ML/day on a falling river,

Note: The 13 ML/day in (i) is referred to as the cease to pump level, and the 16 ML/day in subclause (i) is referred to as the commence to pump level following a cease to pump event.

(ii) A class flows greater than 16 ML/day and at or less than 44 ML/day on a rising river, and greater than 13 ML/day and at or less than 44 ML/day on a falling river.

(b) in the Westbook management zone:

(i) very low flows at or less than 18 ML/day, measured at Westbrook, and

(ii) A class flows greater than 18 ML/day, measured at Westbrook, and at or less than 44 ML/day at the flow reference point.

(c) in the Umbango management zone:

(i) very low flows at or less than 4 ML/day, measured at Umbango, and

(ii) A class flows greater than 4 ML/day, measured at Umbango, and at or less than 44 ML/day at the flow reference point.

(d) for all management zones:

(i) B class flows greater than 44 ML/day and at or less than 93 ML/day, and

(ii) C class flows greater than 93 ML/day.

Note: The flow classes recognise climate and therefore flow variability, in accordance with section 20 (2) (c) of the Act. They have been determined based on flow information which inherently includes seasonal effects as well as evaporation and seepage losses.

Note: The very low flow provisions established in this clause are subject to the review established in Part 15 of this Plan.