Estimation of Inputs to Florida Bay

Summary of Results

July 1998

This section presents summary tables, graphs, and output data file. For summary purposes, total inputs have been computed for two regions:

The entire model domain, surface area ~ 7,636 km².
Florida Bay (roughly East of Cape Sable, including Mainland inputs from Taylor Slough & Coastal Basins, Runoff & Wastewater Inputs from Upper & Middle Keys), area ~ 1,813 km².

Tables

The following output tables are attached:

Detailed results by Year ( 1994, 1995, 1996, 1997, average 1996-97, average 1987-97) for each term, region, & water quality variable.
Yearly total inflows, phosphorus loads, nitrogen loads to each region (1987-1997) by source category (Mainland, Keys runoff, Keys wastewater, & Atmospheric loads).

Pie Charts

The following pie charts show average percentage contributions of flow, phosphorus and nitrogen from each source category to the entire model domain and to Florida Bay for 1996-1997:

Yearly Inputs to Model Domain

The following charts show yearly variations in flow, phosphorus, and nitrogen inputs to the entire model domain. Average inflow concentrations of phsphorus & nitrogen are computed as the ratio of total load to total inflow volume. Colors reflect percentage load contribution from each source category.

Yearly Inputs to Model Domain

Yearly Inputs to Florida Bay

The following charts show yearly variations in flow, phosphorus, and nitrogen inputs to Florida Bay. Average inflow concentrations of phosphorus & nitrogen are computed as the ratio of total load to total inflow volume. Colors reflect percentage load contribution from each source category.

Yearly Inputs to Florida Bay

Output File

An Excel workbook is contained in the attached compressed file (RESULTS.ZIP, size ~0.8 megabytes) containing monthly results for all input terms is attached. The workbook includes an index of terms, definitions of all water quality variables, atmospheric loading rates, monthly Bay rainfall, and monthly flows & flow-weighted-mean concentrations for each mass-balance term. Results cover the period from October 1986 through December 1997. For some terms, results start in October 1985.

Discussion

Based upon the above results and discussions contained in individual sections of this report, refinements developed under Phase II of this project should focus on the following areas:

atmospheric deposition; analysis of recent data collected by SFWMD at the ENP Reasearch Center.
wastewater loads (especially phosphorus); assumptions regarding attenuation of loads between points of groundwater discharge and points of entry to the Bay are likely to be critical (the above estimates assume 50% attenuation); water use data may provide a better basis for estimating wastewater volumes and loads;
runoff phosphorus loads; assumptions regarding source concentrations and attenuation are critical; land use and runoff concentration estimates can be refined;
inflow volumes from the mainland; quantities and spatial distribution may be critical to simulating salinity and nutrient variations in specific regions;

Further insights may be gained from sensitivity analyses conducted with the water quality model.

Project Index

http://www.shore.net/~wwwalker/flabay/results.htm Updated: 02/22/00