St. Johns River Water Management DistrictSt. Johns River Water Management District

Hydrologic Modeling in Orange Creek Basin

Dale Smith, P.E.Bureau of Engineering &

Hydro - Sciences

St. Johns River Water Management District

Orange Creek Basin

• Covers 600 Square Miles

• 282 Square Miles contribute to Orange Lake

Man-made Alterations

• Railroad Trestle • US 301 • Newnans Lake Weir • Prairie Creek Water

Control Structure • Orange Creek Weir • Lochloosa Lake Outlet • Sinkhole Intervention

St. Johns River Water Management District

St. Johns River Water Management District

Source: Schiffer (1998)

Formation of Florida Lakes

Surficial aquiferConfining unitFloridan aquifer

St. Johns River Water Management District

Why Model ?The watershed has plenty of data that can be used to provide linkages to past events.

Data alone will not help predict changes in a watershed.

Models are need to generate data necessary to analyze scenarios.

St. Johns River Water Management District

Orange Lake Water Levels

St. Johns River Water Management District

Orange Lake Water Levels

St. Johns River Water Management District

St. Johns River Water Management District

Regional Rainfall Patterns

St. Johns River Water Management District

Orange Lake vs. Aquifer Water Levels

St. Johns River Water Management District

Orange Lake Sinkhole Complex

St. Johns River Water Management District

Models Developed in the Orange Creek Basin

• 1997 SSARR Model for Alternative Analysis of Lake Levels

• 2006 Spread sheet models for PLRGs

• HSPF Model for TMDLs

• HSPF Model for the Water Supply Impact Study

• 2014 HSPF model of Lockloosa Lake for TMDL

St. Johns River Water Management District

+U

+U

+U")

$+

$+

#*

#*

#*#*

#*

#*#*

+U

LE

VY

MA

RIO

N

AL

AC

HU

A

PU

TN

AM

BR

AD

FO

RD

CLA

Y

Bee Tree Creek @ Orange Height

Hatchet Creek @ Fairbank

N. Branch Little Hatchet Creek

Lake Forest Creek @ Kincaid Hill

Prairie Creek @ Gainesville

Camps Canal @ Rochelle

Newnans Lake @ Gainesville

Orange Lake @ Boardman

Lochloosa Creek @ Grove park

Lochloosa Creek S.@ Grove Park

Lochloosa Lake @ Hawthorne

Orange Lake Outlet @ Citra

Huff Well (M-0367)

Sparr Well (M-0014, M-0063)

Hawthorne Well(A-0071)

F-5 Well(A-0708)

®2 0 21 Miles

1:260000

The St. Johns River Water Management District preparesand uses this Information forits own purposes and thisinformation may not be suitable for other purposes. Thisinformation is provided as is. Further documentation of thisdata can be obtained by contacting:St. Johns River Water ManagementDistrict, Geographic InformationSystems,Program Management, P.O.Box 1429, 4049 Reid StreetPalatka, Florida 32178-1429Tel: (386) 329-4176.

Author:zlin, Source:I:\ENGDATA\OCB\OCB Three Lakes.mxd, Time:7/23/2007 4:02:33 PM

Hydrologic Stations

Le

ge

nd

#* Streamflow Calibration Stations

") Camps Canal Diversion

Lake Stage Stations

+U Groundwater Wells

Subbasin Boundaries

Water Bodies

Streams

$+ Streamflow Verification Stations

Model Inputs

• Precipitation • Evaporation• Discharge• Stages• Watershed delineations• Land use• Discharge/ Recharge

St. Johns River Water Management District

Orange Creek Basin Groundwater Recharge Zones

St. Johns River Water Management District

• Conceptually,

• Practically, in HSPF model a Special Action module written to model L.

Source: Motz et al. (2001)

hb

KL v

+L)+O)-(E+O+R+IΔS=(P+I gsgs

Modeling Vertical Leakage (L)Between Lake and Underlying Aquifer

St. Johns River Water Management District

Orange Lake Model Calibration

St. Johns River Water Management District

Inflow Outflow

Orange Lake Water Budget