Queensland Consolidated Regulations

WATER PLAN (GULF) 2007 - SCHEDULE 5

SCHEDULE 5 – Environmental flow objectives

Part 1 - Low flow objectives

1 At node 1—

(a) the number of periods of no flow of more than 1 month but less than 6 months in the simulation period be not more than 150; and

(b) the number of periods of no flow of 6 months or more in the simulation period be not more than 80; and

(c) the number of days on which the daily flow equals or exceeds the median non-zero daily flow, expressed as a percentage of the number of days on which the daily flow for the pre-development flow pattern equals or exceeds the median non-zero daily flow, in the simulation period be at least 50%.

2 At node 6, the proportion of no flow days in the simulation period be no more than 28%.

3 At node 7, the proportion of no flow days in the simulation period be no more than 70%.

Part 2 - Medium to high flow objectives

1 At each node mentioned in table 2, column 1—

(a) the mean annual flow in the simulation period, expressed as a percentage of the mean annual flow for the pre-development flow pattern in the simulation period, be at least the percentage stated for the node in column 2 of the table; and

(b) the median annual flow ratio in the simulation period, expressed as a percentage of the median annual flow for the pre-development flow pattern in the simulation period, be at least the percentage stated for the node in column 3 of the table; and

(c) the 10% daily flow be equalled or exceeded on at least the number of days in the simulation period, expressed as a percentage, stated for the node in column 4 of the table; and

(d) the 1.5 year daily flow volume in the simulation period, expressed as a percentage of the 1.5 year daily flow volume for the pre-development flow pattern in the simulation period, be at least the percentage stated for the node in column 5 of the table; and

(e) the 5 year daily flow volume in the simulation period, expressed as a percentage of the 5 year daily flow volume for the pre-development flow pattern in the simulation period, be at least the percentage stated for the node in column 6 of the table; and

(f) the 20 year daily flow volume in the simulation period, expressed as a percentage of the 20 year daily flow volume for the pre-development flow pattern in the simulation period, be at least the percentage stated for the node in column 7 of the table.

Table 2

	Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7
	Node	Mean annual flow	Median annual flow	10% daily flow	1.5 year daily flow volume	5 year daily flow volume	20 year daily flow volume
	1	63%	37%	5%	37%	70%	72%
	6	93%	89.5%	–	93%	97%	98%
	7	90%	78%	–	90%	96.5%	98%

Part 3 - Wet season flow objectives

1 At each node mentioned in table 3, column 1, the median wet season flow in the simulation period, expressed as a percentage of the median wet season flow for the pre-development flow pattern in the simulation period, be at least the percentage stated for the node in column 2 of the table.

Table 3

	Column 1	Column 2
	Node	Median wet season flow
	6	90%
	7	75%