Queensland Consolidated Regulations

WATER PLAN (LOGAN BASIN) 2007 - SCHEDULE 5

SCHEDULE 5 – Environmental flow objectives

Part 1 - Low flow objectives

1 At each node mentioned in table 1, column 1, the 50% daily flow for the pre-development flow pattern for a water flow season is stated in column 2 of the table.

Table 1

	Column 1	Column 2
	Node	50% daily flow in megalitres
		Feb–April water flow season	May–July water flow season	Aug–Nov water flow season	Dec–Jan water flow season
	A	21	12	7	9
	B	40	21	10	26
	C	77	48	29	37
	D	59	42	28	33
	E	9	6	3	5
	F	72	43	26	37
	G	585	318	185	327

2 At each node mentioned in table 2, column 1, the percentage of the total number of days in a water flow season in the simulation period that the 50% daily flow for the plan scenario flow pattern stated for the water flow season in table 1 is equalled or exceeded be at least the percentage stated in column 2 of the table for the water flow season.

Table 2

	Column 1	Column 2
	Node	Feb–April water flow season	May–July water flow season	Aug–Nov water flow season	Dec–Jan water flow season
	A	41	41	43	41
	B	41	40	42	40
	C	35	34	23	32
	D	35	34	19	19
	E	42	43	37	41
	F	35	34	27	32
	G	30	25	13	21

3 At each node mentioned in table 3, column 1, the 90% daily flow for the pre-development flow pattern for a water flow season is stated in column 2 of the table.

Table 3

	Column 1	Column 2
	Node	90% daily flow in megalitres
		Feb–April water flow season	May–July water flow season	Aug–Nov water flow season	Dec–Jan water flow season
	A	1	1	0	0
	B	2	2	0	1
	C	17	18	11	9
	D	12	12	7	5
	E	0	1	0	0
	F	14	15	7	6
	G	110	108	47	54

4 At each node mentioned in table 4, column 1, the percentage of the total number of days in a water flow season in the simulation period that the 90% daily flow for the plan scenario flow pattern stated for the water flow season in table 3 is equalled or exceeded be at least the percentage stated in column 2 of the table for the water flow season.

Table 4

	Column 1	Column 2
	Node	Feb–April water flow season	May–July water flow season	Aug–Nov water flow season	Dec–Jan water flow season
	A	80	83	81	80
	B	80	78	77	81
	C	70	66	35	43
	D	51	57	27	25
	E	79	76	60	58
	F	71	71	41	45
	G	53	38	29	44

5 At each node mentioned in table 5, column 1, the percentage of the total number of days in the simulation period on which the daily flow is less than 1ML be between the minimum and maximum percentages stated for the node in column 2 of the table.

Table 5

	Column 1	Column 2
	Node	Minimum-maximum percentage
	A	11–19
	B	8–26
	C	0–2
	D	0–4
	E	14–55
	F	7–61
	G	0–24

6 At each node mentioned in table 6, column 1, minimise the extent to which—

(a) the number of periods of no flow of at least 1 month but less than 3 months in the simulation period is less than the minimum or more than the maximum number stated for the node in column 2 of the table; and

(b) the number of periods of no flow of at least 3 months but less than 6 months in the simulation period is less than the minimum or more than the maximum number stated for the node in column 3 of the table; and

(c) the number of periods of no flow of at least 6 months in the simulation period is less than the minimum or more than the maximum number stated for the node in column 4 of the table.

Table 6

	Column 1	Column 2	Column 3	Column 4
	Node	Minimum-maximum	Minimum-maximum	Minimum-maximum
	A	6–26	0–3	0–0
	B	8–45	1–12	0–0
	C	0–2	—	—
	D	0–4	—	—
	E	12–73	1–29	0–6
	F	0–127	0–38	0–11
	G	0–17	0–2	0–0

Part 2 - Medium to high flow objectives

At each node mentioned in table 7, column 1—

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

(b) the 1.5 year daily flow volume, expressed as a percentage of the 1.5 year daily flow volume for the pre-development flow pattern, be at least the percentage stated for the node in column 3 of the table; and

(c) the 5 year daily flow volume, expressed as a percentage of the 5 year daily flow volume for the pre-development flow pattern, be at least the percentage stated for the node in column 4 of the table; and

(d) the 20 year daily flow volume, expressed as a percentage of the 20 year daily flow volume for the pre-development flow pattern, be at least the percentage stated for the node in column 5 of the table.

Table 7

Part 3 - Seasonal flow objectives

At each node mentioned in table 8, column 1—

(a) the annual proportional flow deviation be no greater than the annual proportional flow deviation stated for the node in column 2 of the table; and

(b) the flow regime class be maintained as late summer flow regime class.

Table 8