Review of 2016 Environmental Flows and Yield Models
In-depth analysis and evaluation of updated RiverWare models focusing on the incorporation of 2016 environmental flows and the development of demand scenarios. Comparison between SBG and USACE models, adjustments in environmental flows, and yield estimations for various reservoirs are discussed. The assessment includes operational criteria development and potential demand identification, providing insights for effective water resource management.
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Presentation Transcript
Review of updated RiverWare models Incorporation of 2016environmental flows developed by Espey/Carollo team Development of demand scenarios that Identify the location of potential demands Develop operational criteria to meet those demands Additional modeling
SBG and USACE using different versions and assumptions (flood operations versus yield estimating) Reviewed multiple versions of the USACE Model Tech memo defining standard set of inputs and assumptions for future runs Memo Provided as Attachment A of TM1-2
New environmental flows Minor update to Lake Ralph Hall hydrology No scenarios with summer release of 86 cfs release from Patman Some scenarios with new Patman senior to Marvin Nichols
30,000 25,000 20,000 ac-ft/month 15,000 10,000 5,000 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Average 2016 Eflows Lyons Eflows
180,000 160,000 140,000 120,000 ac-ft/month 100,000 80,000 60,000 40,000 20,000 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Average 2016 Eflows Lyons Eflows
350,000 304,883 New Yield (acre-feet per year) 287,445 300,000 250,000 200,000 153,253 131,700 150,000 100,000 50,000 0 232.5 ft 242.5 ft 2016 Yield Lyons Yield Does not include 180,000 ac-ft currently authorized from Patman
500,000 464,200 450,000 392,297 Yield (acre-feet per year) 400,000 350,000 300,000 250,000 200,000 150,000 100,000 50,000 0 328 ft 2016 Yield Lyons Yield
800,000 Patman at 232.5 ft Nichols at 328 ft Patman at 242.5 ft Nichols at 328 ft 700,000 650,828 606,042 Yield (acre-feet per year) 600,000 515,114 460,643 500,000 400,000 300,000 200,000 100,000 0 2016 Yield Lyons Yield 2016 Yield Lyons Yield 2016 New Patman 2016 Nichols Lyons Patman Lyons Nichols Does not include 180,000 ac-ft currently authorized from Patman
800,000 Patman at 242.5 ft Nichols at 328 ft Patman at 232.5 ft Nichols at 328 ft 700,000 Yield (acre-feet per year) 606,042 600,000 564,892 460,643 500,000 437,967 400,000 300,000 200,000 100,000 0 Nichols Senior New Patman Senior Nichols Senior New Patman Senior Patman Nichols
Summarized in TM1-1 Scenario 1 In-basin demands only Scenario 2 Adds demands adjacent to basin 300,000 Demand (acre-feet per year) 250,000 200,000 150,000 100,000 50,000 0 Scenario 1 Scenario 2 2070 Demands In-Basin Reserve
800,000 Patman at 242.5 ft Nichols at 328 ft Patman at 232.5 ft Nichols at 328 ft 700,000 638,425 Yield (acre-feet per year) 606,042 600,000 496,824 500,000 460,643 400,000 300,000 200,000 100,000 0 Priorrity Operation Patman/ Nichols Priorrity Operation Patman/ Nichols Patman Nichols Alternative Operation
New environmental flows Reduce yield of Nichols Increase yield of Patman Reduce combined yield of Patman and Nichols 20% reserve for in-basin needs should be sufficient to meet all in-basin needs plus some additional water for out-of- basin Holistic operation of Patman/Nichols to meet demand could increase yield from system
