Application of the Lake Okeechobee WSE Regulation Schedule on 09/03/2007

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 La Nina years3 and a sub-sampling of warm years in the Atlantic Multidecadal Oscillation (AMO) in combination with La Nina 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
La Nina Years3

Sub-sampling of
AMO Warm + La Nina Years4

Value (ft)

Condition

Value (ft)

Condition

Value (ft)

Condition

Value (ft)

Condition

Current

(Sep-Feb)

1.77

Wet

1.62

Wet

0.51

Dry

0.61

Dry

Multi Seasonal (Sep-Apr)

1.72

Normal

1.60

Normal

0.11

Dry

0.14

Dry

See Seasonal and Multi-Seasonal tables for the classification of Lake Okeechobee Outlooks. The numeric limits on the classifications were changed effective 15 March 2005 per USACE approval. Refer to the Environmental Assessment (EA) for the Temporary Planned Deviation to Adjust Classifications of Hydrologic Indicators and Forecasts (December 2004) .

The recommended methods and values for use in the WSE decision trees for estimation of Lake Okeechobee  Net Inflow Outlook are shaded.

Tributary Hydrologic Conditions Graph:

519 cfs 14 day running average for S65E flows through 09/02/07.
According to the classification in Tributary Hydrologic Conditions table, this condition is Normal.

0.14 inches** of 30 day running sum for net rainfall through 09/03/07.
According to the classification in Tributary Hydrologic Conditions table, this condition is Normal.

The wettest of the two conditions above is Normal

** Negative net rainfall indicates the evapo-transpiration (ET) is greater than rainfall.

WSE Classification Tables:

Lake Okeechobee Stage on 09/03/2007

Lake Okeechobee Stage: 9.53 feet

Stage value taken from the USACE Report for Lake Okeechobee

Lake Okeechobee Stage Hydrograph

Bottom line for Zone D = 14.83 ft.

Bottom line for Zone C = 16.16 ft.

Lake Okeechobee Stage is in Zone E of the WSE Regulation Schedule.

 

Part 1 of WSE: Discharge to WCA's

 

Lake Okeechobee Stage is in Zone E of the WSE Regulation Schedule.

Decision Tree Outcome: No Regulatory Discharge

Release Decision:

Part 2 of WSE: Discharge to Tidewater

 

Lake Okeechobee Stage is in Zone E of the WSE Regulation Schedule.

Decision Tree: No Regulatory Discharge

Release Decision:

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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