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Validation of NRBHM OASIS. Model Version: SimBase Intermediate version modified in August 2009 Assumptions: Demand 2007 – Actual monthly pattern for daily average WWRF 2007 - PowerPoint PPT Presentation
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NCDWR September 2009 1
Validation of NRBHM OASIS
Model Version:SimBase Intermediate version modified in August 2009
Assumptions:– Demand 2007 – Actual monthly pattern for daily average – WWRF 2007
• Actual monthly pattern for daily average for demand nodes as pattern [Not a function of demand data - changed return flow OCL file].
• Actual monthly pattern for daily average for direct return flow nodes as inflow– Beginning of Yr 2007 Reservoir Levels– No actual Agricultural Data - used as calculated by the model– No actual Evaporation Data - used as calculated by the model– No Actual Reservoir Drought/Special Operation
Input Data File Location:• F:\DATA\RBMS\Neuse Basin\Neuse Model\01 OASIS - Neuse Hydrologic Modeling\Validation Run Inputs.xls
NCDWR September 2009 2
Validation of NRBHM OASIS
Comparison of Computed vs. Historical Operation:– Falls Lake Elevation– Falls Lake and Beaver Dam Total storage percent– Falls Lake and BD Total WS - WQ percent– Falls Lake Release
– West Fork Eno River Reservoir Elevation– West Fork Eno River Reservoir Release
– Lake Orange Elevation– Lake Orange Release
– Little River and Lake Michie Elevations– Little River and Lake Michie Releases
NCDWR September 2009 3
Validation of NRBHM OASIS
Comparison of Computed vs. Historical Data:• Hillsborough Gage Data – node 110
• Clayton Gage Data – node 630
• Princeton Gage Data – node 750
• Goldsboro Gage Data – node 780
• Kinston Gage Data – node 800
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Falls Lake – Beaver Dam Operation
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Wake County Voluntary - DM Levels
03/13/2007 D0 - Abnormally Dry
04/17/2007 No Drought
05/01/2007 D0 - Abnormally Dry
06/26/2007 D1 - Moderate
08/14/2007 D2 - Severe
09/04/2007 D3 - Extreme
10/02/2007 D4 - Exceptional
10/30/2007 D3 - Extreme
11/20/2007 D4 - Exceptional
12/31/2007 D4 - Exceptional
D4
D2
D1
D3
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Upper Rule Curve = 251.5 ‘
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@ 249’ Falls Elevation = BDam Elevation
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Lower Rule Curve = 236.5 ‘
Upper Rule Curve = 251.5 ‘
Winter Piggyback Release
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Upper Eno Operation
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Stage 1
Stage 2
Stage 3
Stage 4
Withdrawal Restriction Period 2007
Stage 1: May 27 Stage 2: Jul 31 Stage 3: Sep 5Stage 4: Sep 28 Stage 5: Nov 8
Stage 5
Drought Operation??
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Upper Rule Curve 633’
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Upper Rule Curve 633’
Lower Rule Curve 603’
Tier 1
Tier 2
Tier 3
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Stage 1
Stage 2
Stage 3
Stage 4 Stage 5
Withdrawal Restriction Period 2007
Stage 1: May 27 Stage 2: Jul 31 Stage 3: Sep 5Stage 4: Sep 28 Stage 5: Nov 8
Upper Rule Curve 615’
~ 6’ D/D
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Upper Rule Curve 615’
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Dead Storage 601.7’
Stage 4Stage 5
Zero outflow for 2 days in Dec 07
Withdrawal Restriction Period 2007
Stage 1: May 27 Stage 2: Jul 31 Stage 3: Sep 5Stage 4: Sep 28 Stage 5: Nov 8
Stage 1
Stage 2
Stage 3
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Dead Storage 198.6 AF
Lowest Storage 198.3 AF
0% remaining storage for 8 consecutive days from 12/20/07
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Durham Systems
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Gage Flows
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Stage 1
Stage 2
Stage 3
Stage 4 Stage 5
Instream Flow Requirements @ HB Gage
Stage 1: 1.75 MGD – [May 27] Stage 2: 1.13 MGD – [Jul 31] Stage 3: 1.1 MGD – [Sep 5]Stage 4: 1.1 MGD – [Sep 28]Stage 5: 0.65 MGD – [Nov 8]
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10% CLoss @ 4 – 12 cfs
20% CLoss @ <4 cfs
0% CLoss @ > 12 cfs
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Clayton Target 184 cfs Clayton Target 184 cfs
Clayton Target Safety Factor
Clayton Target 254 cfs
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Clayton Flood Control Max Target Flow 5332 cfs
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Flood Control Target Flow = 6003 cfs
Min calculated flow = 101 cfs
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Flood Control Target Flow = 7168 cfs
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