DMSTA Calibration & Enhancements for Reservoirs
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Summaries |
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Lake & Reservoir Dataset Index |
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Bar Charts of Dataset Characteristics |
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Depth & Load Ranges for Calibration Datasets vs. CERP Reservoir Designs |
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Depth & Load Ranges for Other Lake & Reservoir Datasets |
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Concentration Reductions - First Order Model |
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Concentration Reductions - Second Order Model |
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Concentration Reductions - Biomachine Model |
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Biomachine Model - Reservoir vs STA Calibrations - K & C1 |
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Steady-State Model Applied to Other Florida Lake Data |
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CERP Reservoir Simulations |
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Testing of Joint Calibration K = 3.2 m/yr, C1 = 150 ppb, C0 = 4 ppb |
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Observed vs. Predicted Concentration Reductions |
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Observed vs. Predicted Concentrations & Loads |
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Scatter Plots - K vs. Dataset Features |
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Flow-Weighted Mean Residuals |
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Geometric Mean Residuals |
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Dynamic Residuals - All Datasets Combined - 30-90 Day Averages |
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Dynamic Residuals - All Datasets Combined - Yearly Averages |
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Sensitivity to K (1.6, 3.2, 6.4 m/yr) - Outflow Concentration, Load, & Storage |
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Sensitivity to Model (Biomachine, First-Order, Second-Order) - Outflow Conc, Load, & Storage |
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Summary of Individual Calibrations
C0 = 4 ppb, C1 = 150 ppb, K's Calibrated to Each Dataset |
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Concentration |
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Concentration Residuals |
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Log Concentration |
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Flow Residuals |
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Outflow Load |
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Depth Residuals |
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Outflow Volume |
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P Storage |
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Residuals vs. Dataset Characteristics |
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Depth |
| Detailed Calibration
Results - Lake
& Reservoir Datasets 6 Summaries: Map Listing Bar Charts Scatter Plots Conc Time Series Sensitivity to Model Sensitivity to Calibration Home |
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| Dataset | Source | Map | Calib Years |
Area km2 |
Conc. Reduc |
HLR m/yr |
K m/yr |
Calib1 | Sensitivity to Model2 |
Sensitivity to Calib3 |
Resids4 | Notes / Limitations |
| Okeechobee 1975-1978 |
WWW |
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4 | 1732 | 69% | 1.3 | 4.2 |
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large; low HLR, wind effects;
calcium effects; trends; outflow concs from open lake (pelagic zone) |
| Okeechobee 1979-1986 |
WWW |
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8 | 1732 | 53% | 1.4 | 3.2 |
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" |
| Okeechobee 1987-1994 |
WWW |
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8 | 1732 | 40% | 1.3 | 2.0 |
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| Okeechobee 1995-1999 |
WWW |
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5 | 1732 | 28% | 1.9 | 1.2 |
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" |
| Okeechobee 1975-1999 |
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25 | 1732 | 45% | 1.5 | 2.4 |
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| Okee.Outlets 1982-1999 |
WWW |
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25 | 1732 | 38% | 1.5 | 1.8 |
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" outflow concs from outlets;
data incomplete < 1982; test sensitivity to outflow conc monitoring location |
| Istokpoga5 | WWW |
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12 | 110 | 51% | 3.5 | 5.0 |
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inflows/outflows from Istokpoga canal ignored quarterly/bimonthly sampling |
| Istokpoga_25 | B&M |
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13 | 112 | 52% | 3.2 | 5.9 |
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"" outflow conc series revised |
| Jessup5 | B&M |
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8 | 53 | 38% | 3.3 | 2.3 |
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outlet backflow; 39% inflow ungauged |
| Crescent5 | B&M |
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6 | 71 | 18% | 10 | 2.8 |
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outlet backflow; 54% inflow ungauged |
| Thonotosassa5 | B&M |
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10 | 3.3 | 31% | 11 | 4.8 |
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high inflow p;inflow volumes not gauged |
| George5 | B&M |
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6 | 5.9 | -19% | 17 | 0.1 |
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conc. trend;
outlet backflow;
negative p retention; missing inflows 2001; 2001-2003 data ignored |
| Rodman | B&M |
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9 | 30 | 28% | 42 | 21 |
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high HLR; mainstem impoundment; high l/w ratio |
| Poinsett | WSI |
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16 | 16 | 5% | 40 | 5.7 |
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high HLR; favorable depth regimes, but depths
were not directly measured |
| Harney | B&M |
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12 | 30 | -8% | 64 | 1.6 |
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high HLR; negative p retention |
| Harney_2 | WSI |
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9 | 30 | -5% | 81 | 1.9 |
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high HLR; negative p retention |
| St Johns Marsh CA |
B&M |
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5 | 94 | -13% | 140 | 1.3 |
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high HLR; mixed marsh & lakes;
variable area;
negative p retention; 44% inflow ungauged; outflow sites in middle; simulations ignore marsh area |
| Sawgrass | WSI |
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2.6 | 2.0 | 13% | 374 | 17 |
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high HLR; part of SJMCA |
| HellnBlazes | WSI |
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2.7 | 1.5 | 9% | 449 | 0.4 |
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high HLR; part of SJMCA |
| 1 - observed & predicted time series with
biomachine K
values calibrated to each dataset (C1= 150 ppb & C0 = 4 ppb) 2 - sensitivity to calibration using K values of 1.6, 3.2 and 6.4 m/yr. Joint calibration = 3.2 m/yr. 3 - sensitivity to model formulation (RESERV = DMSTA biomachine, RESERV_K1 = first order, RESERV_K2 = second order) using joint calibrations for each. 4 - residuals (ln (observed/predicted concentrations)) vs dataset characteristics for individual calibrations 5 - datasets with hydraulic loads in design range for typical CERP reservoirs ( 2 - 20 m/yr) 6 - in the calibration charts, red symbols represent observed values & lines represent simulated values. |
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http://www.wwwalker.net/dmsta/reservoirs/figs_tabs.html 07/08/2005