New South Wales Consolidated Regulations

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

17 Flow classes

This Plan establishes the following flow classes as the basis for sharing access to water on a daily basis:

(a) very low flow class at or less than 1 megalitre per day (hereafter "ML/day") on a rising river, and at or less than 0.5 ML/day on a falling river,

Note: 0.5 ML/day corresponds to the estimated 90 th percentile of all days with flow, and is referred to as the cease to pump on a falling river, and 1 ML/day corresponds to the estimated 80 th percentile of all days with flow, and is referred to as the commence to pump on a rising river. Special provisions may result in a review of the cease to pump during the life of this Plan.

(b) B class flows greater than 1 ML/day and at or less than 7 ML/day on a rising river, and greater than 0.5 ML/day and at or less than 7 ML/day on a falling river,

(c) C class flows greater than 7 ML/day and at or less than 16 ML/day,

(d) D class flows greater than 16 ML/day and at or less than 100 ML/day, and

(e) E class flows greater than 100 ML/day.

Note: This Plan provides for a review of the very low flow class in accordance with clauses 76 and 77.

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