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

April 5, 2017 1

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 2

NFSEG v1.1 Phase 1 Application Lakes Brooklyn and Geneva 3

amount available for withdrawal Current (sustainable Pumping yield) condition Lake Level / River Flow amount needed to sustain surface water environment and MFL condition beneficial uses Time 4

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 5

KHTM Model NFSEG GRID KHTM Subregional Model 6

NFSEG v1.1 Final version Model Applications (SRWMD) 7

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 8

Example Waterbodies in SRWMD  Streams, rivers, and springs 9

Example Waterbodies in SRWMD  Streams, rivers, and springs 10

Example Waterbodies in SRWMD  Springs (special cases) 11

Example Waterbodies in SRWMD  River subreaches 12

Example Waterbodies in SRWMD  Springs (special cases): ‘karst windows’ 13

Example Waterbodies in SRWMD  Springs (special cases): ‘karst window’ 14

INITIAL SRWMD MFL SCHEDULE 1 1. The Alapaha, Withlacoochee, and Middle and Lower Suwannee MFLs will probably not be adopted until 2018 15