April 5, 2017 1 NFSEG v1.1 Applications Minimum Flows and Levels - - PowerPoint PPT Presentation

April 5, 2017

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NFSEG v1.1 Applications

 Minimum Flows and Levels – Status Assessments

 Is the MFL being met?

 Current condition status  Future condition status

 If not met …

 Current conditions - Recovery plan needed  Future conditions - Prevention plan needed  Model used to support developing recovery/prevention plan

 Regulatory  Project identification and assessment

 Regulatory  Planning

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NFSEG v1.1 Phase 1 Application

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Lakes Brooklyn and Geneva

amount available for withdrawal (sustainable yield) Current Pumping condition amount needed to sustain surface water environment and beneficial uses MFL condition

Time Lake Level / River Flow

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Use of NFSEG Phase 1 for Lakes Brooklyn and Geneva MFLs

 Keystone Heights Transient Subregional Model

(KHTM)

 NFSEG will be used to adjust KHTM lateral boundary

conditions

 Change in water levels along KHTM lateral boundaries

under different scenarios such as

 Pumps-off ( 2009 Pumps off – 2009 Pumps on)  Prevention/Recovery Project simulations if needed

 Conservation Scenarios (Reduction in regional pumping)  Aquifer recharge project scenarios  Other

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KHTM Model

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NFSEG GRID

KHTM Subregional Model

NFSEG v1.1 Final version Model Applications (SRWMD)

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Simulated Waterbodies in SRWMD

 Streams and rivers

 Simulated changes in gw-sw fluxes along river reaches  Includes river, spring, and lake features

 Springs

 Simulated changes in gw-sw fluxes at springs and/or

river reaches containing springs

 MFL springs often have a downstream constraining gage  Special cases (perched pools, river capture, karst

windows)

 Lakes

 Typically changes in heads in UFA underneath lakes  Often used in concert with lake-specific surface-water

models

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Example Waterbodies in SRWMD

 Streams, rivers, and springs

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Example Waterbodies in SRWMD

 Streams, rivers, and springs

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Example Waterbodies in SRWMD

 Springs (special cases)

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Example Waterbodies in SRWMD

 River subreaches

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Example Waterbodies in SRWMD

 Springs (special cases): ‘karst windows’

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Example Waterbodies in SRWMD

 Springs (special cases): ‘karst window’

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• 1. The Alapaha, Withlacoochee, and

Middle and Lower Suwannee MFLs will probably not be adopted until 2018

INITIAL SRWMD MFL SCHEDULE