stormwater & wastewater management meeting rising ...€¦ · stormwater & wastewater...
TRANSCRIPT
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Stormwater & Wastewater Management – Meeting Rising
Expectations (Part II)
Christopher J. Brown, Ph.D., P.E.
Associate Professor, University of North Florida
2017 SAME Jacksonville Post - Joint
Engineer Training Symposium (JETS)
Presentation August 30, 2017
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Presentation Outline
• Discuss Example Projects Location and Study Area.
• General discussion of “green methods” of managing nutrient disposal.
• Discuss Water Farm Project.
• Discuss Blue Head Ranch Project.
• Summary and Future Direction.
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“Green” Nutrient Removal
• Many technologies being looked at around the globe.
• For this presentation, we will discuss:
– Artificial Recharge;
– Stormwater Treatment Areas;
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Examples• C-111 Project in South Florida and ECP in
South Florida
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Project Location Map
Fisheating
Creek Basin
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Water Farm• The so-called “Water Farm” is essentially a
large artificial recharge project;
• 418 acre pilot project constructed in 2013;
• Monitoring and assessment for 2 years; and,
• Success ! – being expanded now.
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Key Instrumentation
GroundwaterFlowDirection
Green RidgeArea
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Detailed Site Map
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Generalized Cross-Section & Water Budget Components
9.6 m
~ 7.65 m3H:1V
Surficial Aquifer System
Note: Elevations reference NGVD 1929 meters
Change in Storage
Recharge or Percolation IN
Pump In Precipitation In; Evaporation Out
Not to Perfect Scale
2.5H:1V slopes
~-39 mHawthorn Group
Occasional Limestone
Sand, shell, & Sandstone
Sand & Clayey Sand
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Water Farm Observation Well Data and C-44 Canal Stages
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Comparison of Excel“Solver” Model Vs. Observed Stage for Excel Water Budget Model
NSE = 0.99
Actual Stage Estimated fromWell data.
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Calibrated Water Levels& Flow Path Distances
2 ft Contours
4,000 ft
1,200 ft
8,000 ft
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Final Results
• From Feb 2014 to April 15, 2015, approximately 20,000 Ac-Ft of water stored in the basin;
• Approximately 82.3 % percolated back into Surficial Aquifer System;
• Approximately 11.4 % was evaporated or transpired; and, rest was in temporary storage.
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Final Results
• Unit Cost of storage was estimated to be $37/Ac-Ft versus about $202/Ac-Ft for nearby C-44 reservoir;
• It is estimated that the basin removed about 2.66 MT of phosphorus and 13.10 MT total nitrogen;
• Value of the water quality benefit alone is estimated to be at least $900,000 versus SFWMD total investment of $1,200,000.
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Possible Configuration forSite Expansion
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Blue Head Ranch• Feasibility of nutrient removal projects for
ranch and greater Fisheating Creek basin;
• Developed a range of alternative STA options;
• Report 2017
• Coordination with FDEP now.
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Figure 4Property Location Map
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Figure 8Median and Mean Daily Flow per Area ValuesMap Source: Loinaz (2005)
Contributing toUSGS 002255600
Sub-Total = 60.35 mi2
Contributing toFishV_O
Contributing toFishP
Contributing toFishCR
Median Q = 4.40 cfsMean Q = 53.07 cfs
Sub-Total = 128.69 mi2
Median Q = 12.60 cfsMean Q = 79.50 cfs
Sub-Total = 122.29 mi2
Median Q = 22.00 cfsMean Q = 121.99 cfs
Sub-Total = 132.33 mi2
Median Q = 56.00 cfsMean Q = 116.50 cfs
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Figure 9Key TP Water Quality Data
** TP annual loads represent likely maximum values for the watershed
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Figure 10Key Model Hydrographs
Calibration Results at FishV_O, Simulated Flow
Calibration Results at FishV_O, Observed Flow
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Figure 11Key Model Hydrographs
Calibration Results at FishP
Calibration Results at FishP, Simulated Flow
Calibration Results at FishP, Observed Flow
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Figure 12Key Model Hydrographs
Validation Results at FishP
Validation Results at FishP, Simulated Flow
Validation Results at FishP, Observed Flow
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Alternative # 2
Proposed 125 Acre Footprint with ~ 100Acre Treatment Area
Intake PumpStation
Inlet Canal orPipeline
Not to Scale
Outlet WorksEqualization Pool
Map Sources: Blue Head Ranch & Cattle Company LLC
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Final Results
• Four alternatives evaluated ranging from 125 to 725 acres;
• Estimated to remove from 0.53 to 4.16 MT/year TP and 3.63 to 17.83 MT/year TN;
• Unit Cost of TP water treatment was estimated to range from $173,000 to $502,000/MT;
• At the high end, the plan could alleviate up to 8.6% of the TP reduction target for Lake Okeechobee; and,
• Value of the water quality benefit alone is estimated to be as much as $2,221,351/year.
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Questions
• Thank you for the opportunity to provide this presentation.
• Thank you to the study sponsors (Caulkins Citrus Inc. and Blue Head Ranch).
• Questions ??
Chris Brown – [email protected];
https://www.researchgate.net/profile/Christopher_Brown17/projects
Further Information on Studies: