A. GOAL OF SURFACE WATER ANALYSIS
Assess the impact surface water drainage has had on the water level of lakes in the
Highlands Ridge Water Use Caution Area.
B. OBJECTIVE OF SURFACE WATER ANALYSIS
1. Estimate the effect surface water drainage has had on lake levels within the
Highlands Ridge Water Use Caution Area using a water budget analysis of the
surface water and surficial aquifer system.
2. Predict the effect rehabilitation of drainage systems would have on lake levels
within the Highlands Ridge Water Use Caution Area.
C. SCOPE OF WORK
1. Analyze two drainage systems in detail, one with major drainage projects
(Josephine Creek Basin) and one with minimal drainage (Crooked Lake Basin).
2. Estimate drainage's influence on lake level by comparing two water budget
simulations of identical time periods that differ only in the drainage element
(pre-post drainage comparison).
3. Analyze drainage rehabilitation as to the impact to lake levels and flooding in
4. Relate the two detailed water budget analyses to drainage characteristics of
other drainage basins to predict the potential for drainage impacts to lakes
within these basins.
D. HIGHLANDS RIDGE MAJOR SUB-BASINS
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E. PROJECT STATUS
The surface/ground water model of the Josephine Creek study area has been
completed. Due to the size of the study area (180 sq. miles), the study area was
divided into two sub-basins for calibration. The northern sub-basin includes Lakes
Sebring, Jackson, Little Lake Jackson, Charlotte, and Josephine and the
Jackson/Josephine canal. This sub-basin has been calibrated to the period of record
for lake levels and rainfall (1980 1991). The southern sub-basin, which includes
Lakes Placid, June-in-Winter, Francis, and Josephine Creek, is being calibrated at this
time. Upon completion of the calibration for both sub-basins, the sub-basins will be
combined and the calibration verified for the entire model.
The model will then be altered to reflect the drainage system which existed prior to
the construction of the present canal system. Utilizing the rainfall for the calibrated
period of record as input, the model will generate lake levels for the period of record.
The difference between the calibrated lake levels and the generated levels should be
the result of drainage.
The Josephine Creek basin has the most extensive drainage system of the eight basins
identified for the Highlands Ridge Water Use Caution Area, while the Crooked Lake
basin has the least extensive drainage system. For this reason these two basins were
selected to be modeled and analyzed for drainage impacts. The impact drainage has
had on the other basins would probably be less than the Josephine Creek basin and
greater than the Crooked Lake basin.
Jn addition to evaluating the regional impact drainage may have to the Highlands
Ridge, localized drainage impacts will also be analyzed. The analysis will also
include alteration to the drainage system and the impacts the alteration would have on
the flooding characteristics of the area.