Bega/Brogo ROSCCo & Trading Meeting (River Operations Stakeholder Consultation Committee Meeting) Bega Civic Centre 4 December 2019 Average 12 Month rainfall
2 WaterNSW Rainfall last 12 Months
3 WaterNSW What are we missing out on?
4 WaterNSW 5 WaterNSW Bega/Brogo system inflows
300000
250000
200000
150000
100000
50000
0 2013 2014 2015 2016 2017 2018 2019
Brgo Dam Inflows Bega River flows
6 WaterNSW Brogo Total Annual Flows
450000
400000
350000
300000
250000
200000
150000
100000
50000
0
2016/17 2003/04 2004/05 2005/06 2006/07 2007/08 2008/09 2009/10 2010/11 2011/12 2012/13 2013/14 2014/15 2015/16 2017/18 2018/19 2019/20
Bega River At Kanowna Brogo River at Angledale
7 WaterNSW Inflows Actual v Statistical since April (last spill)
120
100
80
60
40
20
0 APR MAY JUN JUL AUG SEP OCT NOV Minimum 99% COE Dry 80%COE Median 50% COE Wet 20% COE Actual
8 WaterNSW Brogo Dam storage status
120
100
80
60
Storgae Capacity% 40
20
0 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun 2017/18 2018/19 2019/20 2002/03 2003/04
9 WaterNSW Bega / Brogo Resource Assessment 1 July 2019
Storage Loss 1.10
General Security, 5.58 Essential supplies 2.53
Delivery Loss, 2.50
10 WaterNSW Bega / Brogo Resource Assessment 1 July 2019
Shortfall, 0.34GL
Minimum Inflows, 2.80GL
Brogo storgae volume, 8.57GL
11 WaterNSW Brogo Dam Volume 1 December 2019
Water remaining in Brogo Dam, Airspace, 3.86GL 5.04GL
12 WaterNSW Brogo Dam Forecast Storage Volume – Chance of Exceedance
10
9
8
7
6
5
4 Storgae volume Gl
3
2
1
0
WET 20% COE Median 50% COE DRY 80% COE Minimum Actual
13 WaterNSW Temperature Forecast
14 WaterNSW Soil Moisture Content
15 WaterNSW Water Management Act 2000
3. Objects The objects of this Act are to provide for the sustainable and integrated management of the water sources of the State for the benefit of both present and future generations and, in particular— (a) to apply the principles of ecologically sustainable development, and (b) to protect, enhance and restore water sources, their associated ecosystems, ecological processes and biological diversity and their water quality, and (c) to recognise and foster the significant social and economic benefits to the State that result from the sustainable and efficient use of water, including— (i) benefits to the environment, and (ii) benefits to urban communities, agriculture, fisheries, industry and recreation, and (iii) benefits to culture and heritage, and (iv) benefits to the Aboriginal people in relation to their spiritual, social, customary and economic use of land and water, (d) to recognise the role of the community, as a partner with government, in resolving issues relating to the management of water sources, (e) to provide for the orderly, efficient and equitable sharing of water from water sources, (f) to integrate the management of water sources with the management of other aspects of the environment, including the land, its soil, its native vegetation and its native fauna, (g) to encourage the sharing of responsibility for the sustainable and efficient use of water between the Government and water users, (h) to encourage best practice in the management and use of water.
16 WaterNSW Bega and Brogo Area Regulated, Unregulated and Alluvial WSP
Share components of local water utility access licences It is estimated that at the time of commencement of this Plan, the share components of local water utility access licences authorised to take water from these water sources will total 4,906 ML/year, distributed as follows: (a) 2,640 ML/year in the Mid Bega River Sands Water Source, (b) 66 ML/year in the Upper Bega/Bemboka Rivers Water Source, (c) 1,500 ML/year in the Tantawangalo Creek Water Source, (d) 700 ML/year in the Bega and Brogo Regulated Rivers Water Source, and (e) 0 ML/year in all other water sources.
17 WaterNSW Brogo Dam Inflow Likelihood
Brogo Dam - forecast storgae volume -chance of exceedance 10
9
8
7
6
5
4
Storgae volume Gl 3
2
1
0
WET 20% COE Median 50% COE DRY 80% COE Minimum Actual Genearl Security cease
18 WaterNSW Brogo Dam Volume 1 December 2019
Delivery Allowance, 0.83 General Security Water, 1.83G/L
HS Reserve, 1.20G/L
19 WaterNSW Discussion
• Current usage and water requirements. • General discusssion
20 WaterNSW