TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg...
Transcript of TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg...
![Page 1: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/1.jpg)
TDG UPDATE
Dan TurnerWater Quality Team LeadReservoir Control Center10 May 2019
![Page 2: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/2.jpg)
2
![Page 3: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/3.jpg)
3
3
The DallesDam
Spillway
Power house
TDAtailwatergauge
TDA Forebaygauge
John Day Dam
Spillway
Power house
JDA Forebaygauge
JDA tailwater gauge
121.3%
120.8%
119.8%
117.8%40%
60%
![Page 4: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/4.jpg)
4
![Page 5: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/5.jpg)
5
![Page 6: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/6.jpg)
6
OTHER FACTORS CONSIDERED: DEGASSING
100
105
110
115
120
125
130
135
4/10/2018 4/20/2018 4/30/2018 5/10/2018 5/20/2018 5/30/2018 6/9/2018 6/19/2018
TDG
(% sa
tura
tion)
The Dalles Dam
Tailwater gauge Forebay gauge
![Page 7: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/7.jpg)
7
The Dalles tailwater elevation (average = 79.7 feet)
Bonneville forebay elevation (average = 74.3 feet)
BONNEVILLE FOREBAY & THE DALLES TAILWATER
NOTE: Bonneville Dam forebay normal operating range = 71.5 - 76.5 feet
![Page 8: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/8.jpg)
8
Bonneville inflow forecast• May 10-19• Range: 260-340 kcfs• Average: 300 kcfs
![Page 9: TDG UPDATE - pweb.crohms.orgpweb.crohms.org/tmt/agendas/2019/0510_TDG_Turner_20190510.pdf · fb tdg = 116.0 - 122 % spill (0/0 of total flow) o regression last 48 hours oo . Apr 10](https://reader033.fdocuments.in/reader033/viewer/2022042804/5f53f8cebc4b8f2c4c3fa0d5/html5/thumbnails/9.jpg)
9
9
BON inflow = 300 kcfs• BON forebay avg = 74.3 ft• BON forebay decrease by
2 feet to 72.3 ft• BON forebay decrease of
2 feet = TDA tailwater decrease of 1.4 feet
BON inflow = 400 kcfs• BON forebay decrease of
2 feet = TDA tailwater decrease of 1.1 feet
BON inflow = 200 kcfs• BON forebay decrease of
2 feet = TDA tailwater decrease of 1.7 feet
76.5
71.5