Application of the Lake Okeechobee Regulation Schedule (LORS2008) on 11/17/2008

Lake Okeechobee Net Inflow Outlook:

The Lake Okeechobee Net Inflow Outlook has been computed using 4 methods: Croley's method1, the SFWMD empirical method2, a sub-sampling of Neutral ENSO years3 and a sub-sampling of warm years in the Atlantic Multidecadal Oscillation (AMO) in combination with Neutral ENSO years4. The results for Croley's method and the SFWMD empirical method are based on the CPC outlook.

Table of the Lake Okeechobee Net Inflow Outlooks in feet of equivalent depth. All methods are updated on a weekly basis with observed net inflow for the current month.

Season

Croley's Method1

SFWMD Empirical Method2

Sub-sampling of
Neutral ENSO Years3

Sub-sampling of
AMO Warm + Neutral ENSO Years4

Value (ft)

Condition

Value (ft)

Condition

Value (ft)

Condition

Value (ft)

Condition

Current

(Nov-Apr)

0.10

Dry

0.13

Dry

0.11

Dry

0.18

Dry

Multi Seasonal (Nov-Oct)

3.72

Wet

3.02

Wet

2.86

Wet

4.14

Wet

See Seasonal and Multi-Seasonal tables for the classification of Lake Okeechobee Outlooks.

The recommended methods and values for estimating the Lake Okeechobee Net Inflow Outlook are shaded and should be used in the LORS2008 Release Guidance Flow Charts.

Tributary Hydrologic Conditions Graph:

-1828 cfs 14 day running average for Lake Okeechobee Net Inflow through 11/16/08.
According to the classification in Tributary Hydrologic Conditions table, this condition is Dry.

-1.22 for Palmer Index on 11/15/08.
According to the classification in Tributary Hydrologic Conditions table, this condition is Near Normal.

The wettest of the two conditions above is Near Normal

 

LORS2008 Classification Tables:

Lake Okeechobee Stage on 11/16/2008

Lake Okeechobee Stage: 14.53 feet

USACE Report for Lake Okeechobee

Lake Okeechobee Stage Hydrograph

Lake Okeechobee Management Zone/Band

Bottom Elevation (feet, NGVD)

Current Lake Stage

High Lake Management Band

17.25

 

Operational       Band

High sub-band

16.88

 

Intermediate sub-band

16.25

 

Low sub-band

14.50

 

Base Flow sub-band

12.79

ß 14.49

Beneficial Use sub-band

12.56

 

Water Shortage Management Band

 

 

 

 

Part C of LORS2008: Discharge to WCA's

 

Release Guidance Flow Chart Outcome: Up to Maximum Practicable to WCA’s if Desirable OR with Minimum Everglades Impacts

 

Part D of LORS2008: Discharge to Tidewater

 

Release Guidance Flow Chart Outcome: S-79 Up to 450 cfs; S-80 Up to 200 cfs

 

Technical Input Summaries from:

·         Lake Okeechobee Division

·         Coastal Ecosystems

·         Everglades Ecosystems Division

·         Water Supply Department

·         Water Resource Management Release Recommendation

·         Kissimmee Watershed Environmental Conditions

·         Operations Department

 


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