New South Wales Consolidated Regulations

WATER SHARING PLAN FOR THE OURIMBAH CREEK WATER SOURCE 2003 - REG 17

17 Flow classes

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

(a) very low flow class at or less than 4 megalitres per day (hereafter "ML/day") on a falling river, and at or less than 6 ML/day on a rising river,

Note: The 4 ML/day corresponds to the estimated 97 th percentile of all days of flow and is referred to as the cease to pump on a falling river and 6 ML/day corresponds to the estimated 95 th percentile of all days of flow and is referred to as the commence to pump on a rising river.

(b) A class flows greater than 4 ML/day and at or less than 7 ML/day on a falling river and greater than 6 ML/day and at or less than 7 ML/day on a rising river,

Note: The cease and commence to pumps in subclause (a) and the flow class in subclause (b) are subject to amendment resulting from the review in Part 14 of this Plan.

(c) B class flows greater than 7 ML/day and at or less than 25 ML/day,

(d) C class flows greater than 25 ML/day and at or less than 60 ML/day,

(e) D class flows greater than 60 ML/day and at or less than 160 ML/day, and

(f) E class flows greater than 160 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.