Richmond River (Toonumbar Dam) ROSCCo (River Operations - PowerPoint PPT Presentation

Richmond River (Toonumbar Dam) ROSCCo (River Operations Stakeholder Consultation Committee Meeting) Casino RSM 10 December 2019

Average 12 Month rainfall 2 WaterNSW

Rainfall last 12 Months 3 WaterNSW

What are we missing out on? 4 WaterNSW

5 WaterNSW

Richmond River at Casino Total annual flows 1200000 1000000 800000 600000 400000 200000 0 Annual Flow Richmond at Casino 6 WaterNSW

Toonumbar Richmond Total Annual Flows 350 300 250 200 150 100 50 0 2014 2015 2016 2017 2018 2019 Toonumbar Dam Richmond River at Kyogle 7 WaterNSW

Inflows Actual v Statistical since December 2018 (last spill) 120 100 Storage Capcity (GL) 80 60 40 20 0 DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Actual Wet 20% COE Median 50% COE Dry 80%COE Minimum 99% COE 8 WaterNSW

Toonumbar Dam Storage Capacity 120% 100% 80% Storgae Capacity % 60% 40% 20% 0% 1-Jul 1-Aug 1-Sep 1-Oct 1-Nov 1-Dec 1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 2001/02 2002/03 2003/04 2015/16 2016/17 2017/18 2018/19 2019/20 9 WaterNSW

Toonumbar Resource Assessment 1 July 2019 Storage Essential supplies 0.2 Loss 1.00 Delivery Loss, 0.70 General Security, 9.53 10 WaterNSW

Toonumbar Resource Assessment 1 July 2019 Toonumbar storage volume, 7.24GL Minimum Inflows, 16.50GL 11 WaterNSW

Toonumbar Dam Volume 1 December 2019 Water remaining in Toonumbar Dam, 3.86GL Airspace, 7.14GL 12 WaterNSW

Toonumbar Dam Forecast Storage Volume – Chance of Exceedance 12 10 8 Storgae volume Gl 6 4 2 0 WET 20% COE Median 50% COE DRY 80% COE Minimum Actual Zero Inflows 13 WaterNSW

Temperature Forecast 14 WaterNSW

Soil Moisture Content 15 WaterNSW

Richmond River – Drought Current flow Status Water source/ management zone Reference point Class and accesibility Flow cretria (ML/day) (ML/day) as of (4 Dec) Very Low Flow<=24 Wilson River Gauge Bangalow Area Water Source A 385>Flow>24 11.1 (203014) B Flow>385 Very Low Flow<=15 Richmond River A 308>Flow>15 Gradys Creek Water Source Gauge at Wiangaree 9.4 (203005) B Flow>308 Richmond River Very Low Flow<=15 Upper Kyogle Area Water Management Gauge at Kyogle A 251>Flow>15 6.2 zone (203900) B Flow>251 Richmond River Very Low Flow<=12 Lower Kyogle Area Water Management Gauge at Casino A 584>Flow>12 2.0 zone (203004) B Flow>584 Leycester Creek Very Low Flow<=1 Gauge at Rock A 38>Flow>1 Leycester Creek Water Source 0 Valley B 80>Flow>38 (203010) c Flow>80 Very Low Flow=0 Myrtle Creek Gauge Myall Creek Water Source at Rappville 0 A Flow>0 (203030) Very Low Flow=0 Myrtle Creek Gauge A 4>Flow>0 Myrtle Creek Water Source at Rappville 0 B 28>Flow>4 (203030) c Flow>28 Shannon Brook Very Low Flow=0 Creek Gauge at A 16>Flow>0 Shannon Brook Creek Water Source 0 Yorklea B 52>Flow>16 (203041) c Flow>52 Coopers Creek Very Low Flow<=8.5 Terania Creek Water Source Gauge at Ewing A 229>Flow>8.5 2.5 Bridge(203024) B Flow>229 Richmond River Very Low Flow<=1 staff gauge at the A Flow>1 and <=308 Lavelles Road crossing (203056) Upper Richmond River Water Source 0 9.4 and Richmond River B Flow>1 and >308 gauge (203005) at Wiangaree Coopers Creek at Very Low Flow<=9 Cooper Creek Ewing Bridge Gauge 2.5 A Flow>9 (203024) WaterNSW

Discussion 19 WaterNSW