Tables, Figures and Equations

Tables

Table 1. Monitoring locations of hydrologic and chemical components in the ENR

Table 2. Estimated uncertainties involved in hydrologic and chemical components

Table 3. Water-balance fluxes in ENR from coupled water-solute mass balance: 8/19/94-8/19/98

Table 4. Comparison of ground-water fluxes estimated from coupled water-solute mass balance approach, seepage-meter measurements, and ground-water-flow modeling

Figures

Figure 1. (a) Palm Beach County and vicinity showing location of ENR relative to Everglades Agricultural Area (EAA) and Water Conservation Area (WCAs). (b) Location map illustrating hydrologic and chemical monitoring sites in Everglades Nutrient Removal (ENR) project.

Figure 2. Conceptual model of water flows in the ENR.

Figure 3. (a) Net ground-water flux and (b) ground-water discharge into ENR estimated from combined water and solute mass balance.

Figure 4. Uncertainty in (a) estimated ground-water discharge and (b) comparison of uncertainty in estimated ground-water discharge and chemical difference between ground-water recharge (_Go) and discharge (_Gi).

Figure 5. Contributions (%) of individual uncertainties of hydrologic and chemical measurements to the overall uncertainty in estimating (a) net ground-water exchange and (b) ground-water discharge into ENR.

Figure 6. Locations of seepage meters, distribution of vertical hydraulic gradient, and estimation of area-averaged seepage-meter fluxes in ENR.

Figure 7. Independent estimate of ground-water discharge using seepage meters. (a) Regression of seepage-meter estimates of ground-water discharge against water-level differences between eastern ENR and WCA-1 (r² = 0.984). (b) Ground-water discharge computed for 4-year study period (two-week interval) using regression equation from seepage-meter estimates.

Figure 8. Comparison of estimated ground-water recharge with (a) returned flow from seepage canal (G-250_S) and water level in ENR (ENR202D) and (b) inflow rate of surface water from supply canal into ENR (G-250).

Equations

For extensive descriptions of the equations found in this paper, please contact the scientists for further information. Below are simple explanations drawn from the text.

Equation 1. Governing water-budget equation

Equation 2. Governing water-budget equation, rewritten using the 14-day averaged fluxes

Equation 3. Equation solving for the two unknowns (G_i and G_o) in terms of a net exchange between ENR surface water and ground water

Equation 4. Solute mass balance for a solute in surface water equation, using the same conceptual model for water fluxes in the ENR

Equation 5. Equation of combined approach using water and solute mass balance relationships

Equation 6. Equation for determining uncertainty in a calculated variable