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Everglades Depth Estimation Network (EDEN) for Support of Biological and Ecological Assessments
Cape Sable Seaside Sparrow (CSSS) Viewer
Photo of tree islands

Cape Sable Seaside Sparrow (CSSS) Viewer

Photo of a sparrowCape Sable Seaside Sparrow (CSSS) Viewer

Monitoring water depths in CSSS habitats A through F

The endangered Cape Sable seaside sparrow (CSSS) (Ammodramus maritima mirabilis) is one of eight remaining subspecies of seaside sparrow. The CSSS once ranged throughout freshwater and brackish marsh habitats in southern Florida; the current known distribution is restricted to six separate subpopulation areas (A through F) in Everglades National Park. Changes in habitat and hydrology threaten the CSSS with extinction, and efforts by regulatory and water-management agencies to protect and increase populations have been of limited success. The sparrows build their nests on the ground and up to six inches (about 17 centimeters) above the ground in mixed marl prairies. To increase nesting success, these short-hydroperiod prairies must remain mostly dry during the nesting season (March through July). Previously, a single water-level gage was used to estimate water depths in one or more subpopulation areas. Recently, several water-level gages used to estimate water depths in CSSS habitats were discontinued following a reduction in funding. An alternative and improved method for estimating and evaluating water depths was needed.

The Everglades Depth Estimation Network (EDEN) provides daily water-level and water-depth surfaces for the freshwater Everglades for the period 1991 to current. The CSSS Viewer was developed to use these surfaces to estimate and evaluate water levels and water depths in CSSS habitat on a real-time basis. An animated viewer shows flooded areas and calculates 1) the percent area that is dry, 2) the percent area having water depth less than or equal to six inches of water, and 3) the percent area that has been dry for 90 days for more (baby birds are fledged from the nest in about 90 days), each day by subpopulation areas. Wildlife-resource scientists and managers can use the CSSS Viewer to assess impacts on nesting success and develop management strategies for the future. Water-control managers can use these results to manage movement of water through water-control structures and, when possible, reduce flooding in these areas during the nesting season. This application of the EDEN water-level and water-depth data demonstrates how scientists and resource managers can use EDEN to analyze the effects of water management practices on vulnerable species in the Everglades.

Please send any questions or comments to the EDEN team.

Using the Cape Sable Seaside Sparrow (CSSS) Viewer

The CSSS Water-Depth Maps contain daily water depth based on the daily EDEN water-level surfaces, which are generated each day using water-level gage data, and ground elevation data. Water-depth values are displayed in both centimeters and inches (relative to North American Vertical Datum of 1988 (NAVD 88)). The data is served using the same 400 meters by 400 meters grid as other EDEN data. See details below ("Quality water-level data used to generate the daily water-level surfaces") about the daily water-level surfaces based on the quality of the water-level gage data.

From the Water-Depth Map tab:

  1. Water-depth data
    1. Water-depth value ranges have been pre-selected for this version.
    2. To set the water-depth transparency level, move the slider from left (full transparency) to right (no transparency).
  2. Setting data range
    1. Time periods have been pre-selected based on anticipated user needs for this version.
    2. To change dates, select the data range from the top drop down box.
    3. Once the time period is selected, the maps begin to load into the viewer. The status of the loading process is displayed in the bottom left of the viewing window ("Loading image..."). All of the daily maps are viewable when the status is 'Loaded'.
  3. Animation of daily maps
    1. The map view can be animated using the arrow button which toggles the animation on and off.
    2. The Time range slider allows users to move quickly between maps without using the animation button.
  4. Ground elevation data
    1. The ground elevation allows users to see the topography of dry areas.
    2. To set the ground elevation transparency level, move the slider from left (full transparency) to right (no transparency).
  5. Four-year hydroperiod mean and standard deviation
    1. The four-year hydroperiod allows users to see the mean and standard deviation of annual hydroperiods. Mean four-year hydroperiod for a named year is the average yearly days where the water level is >0 for the previous four years (e.g., 2017 mean four-year hydroperiod is the mean of 2013-2016). Standard deviation is of the mean of those four years.
    2. To set the hydroperiod transparency level, move the slider for water depths from right (no transparency) to left (full transparency) and the slider for the hydroperiods from left (full transparency) to right (no transparency).
    3. You may step through the annual hydroperiod means or standard deviations using the left and right arrows.
  6. Locations of nearby water-level gages
    1. Gages will display on the viewer by checking the box next to "show gages." Deselecting the box will remove the gage markers.
    2. Current hydrographs at each gage can be viewed by clicking the gage pin on the map.
      • The hydrographs are those used for the ERTP monitoring application for this beta version
  7. Subpopulation area daily statistics
    1. Several computations by subpopulation area are computed and displayed by clicking the boxes next to the items listed below. More information about these computations can be found by clicking on the linked text for each item. NOTE: Portions of subpopulation areas B, C, and D are outside the EDEN model domain. The percentage of area computations includes only the subpopulation areas within the EDEN model domain. A CSV file of the subpopulation area statistics used in this application can be downloaded here. Or download the latest year-by-year dry conditions PDF report here.
      • % dry area is the percent of the subpopulation area where water levels are below ground for the selected day
      • % WD ≤ 17 cm is the percent of the subpopulation area where water depths are less than or equal to 17 centimeters for the selected day
      • % dry ≥ 40 days is the percent of the subpopulation area where water levels have been below land surface for the last 40 consecutive days
      • % dry ≥ 90 days is the percent of the subpopulation area where water levels have been below land surface for the last 90 consecutive days
      • mean water depth is the average cm water depth of the pixels of the subpopulation area. Graphs of the subpopulation mean water depths are available for the previous year, wet season, dry season, month, and week.
      • water depth sd is the standard deviation of the cm water depth of the pixels of the subpopulation area
  8. Zooming and Panning
    1. The map view can be zoomed in and out as well as panned using several methods
      • clicking on the "+" and "-" buttons in the upper-right of the map will zoom in or zoom out
      • double-clicking the map will zoom in to that location
      • clicking and holding the left mouse button allows you to move the map
      • the arrow keys on the keyboard allows you to move around the map
      • computer mice equipped with mouse wheels can use the wheels to zoom in and out
  9. Display date — the date of the map displayed is shown in the bottom right of the display window

Quality water-level data used to generate the daily water-level surfaces:

  • Water-level surfaces for the most recent quarter are based on real-time gage data. Real-time water-level data for the gages are transmitted daily by satellite or other telemetry and have received little or no review from the operating agency. The EDEN team uses the ADAM software to quality-assure the data and estimate missing data. Subsequent reviews and edits of the data may result in significant revisions to the data.
  • Water-level surfaces for all previous quarters in the current water year (Oct 1 to Sept 30) are based on provisional gage data. Provisional water-level data for the gages are provided on a quarterly basis from the operating agencies and have received some review and edits by them. For some agencies, the review is near final while for others, the review is preliminary. Then, the EDEN team uses the ADAM software to further quality-assure the data and estimate missing data.
  • Water-level surfaces for the water years prior to the current one are based on final gage data. Final water-level data for the gages are provided on an annual basis from the operating agencies. The EDEN team uses the ADAM software to estimate missing data, if necessary.
water level legend
Water depth
dem legend
Ground elevation (NAVD88)
four-year hydroperiod legend
Four-year hydroperiod
Mean water depth
four-year hydroperiod standard deviation legend
Four-year hydroperiod SD
Mean water depth SD
surface water gage marker
Surface water gage
ground water gage marker
Ground water gage
Select water depth date range:
Date range
Displayed water depth date:
Select 4yr hydroperiod year:
Displayed hydroperiod year:
Dry count statistics:
For 2021-11-27
 ≥40% dryDHP
AX94 days225 days
A72 days255 days
A1134 days169 days
A282 days231 days
B124 days202 days
C108 days194 days
D98 days229 days
E87 days214 days
F126 days140 days
Water depth transparency
Ground elevation transparency
Four-year hydroperiod transparency

Nesting Season/Annual Statistics for Critical Habitats

Summary statistics for the Cape Sable seaside sparrow critical habitats, showing percent of subpopulation areas dry during nesting season (March 1 through July 15) for at least 40 and 90 consecutive days; percent of subpopulation areas with discontinuous hydroperiods during the calendar year of 0 to 89, 90 to 210, and > 210 days; and mean four-year hydroperiod and standard deviation. A CSV file of these statistics used in this application can be downloaded here.

New: Popup statistics graphs now available; click column headings (e.g., "≥ 40") to view.

Nesting Season Statistics: Consecutive dry days

 A NestingAX NestingB NestingC NestingD NestingE NestingF Nesting
≥ 40
≥ 90
≥ 40
≥ 90
≥ 40
≥ 90
≥ 40
≥ 90
≥ 40
≥ 90
≥ 40
≥ 90
≥ 40
≥ 90
19932.9%0.2%5.7%0.4% 78.1%60.1%98.7%97.5%72.8%58.5%91.8%62.4%100%100%

Annual Statistics: Non-consecutive hydroperiod

 A AnnualAX AnnualB AnnualC AnnualD AnnualE AnnualF Annual
0 to 89
90 to 210
≥ 211
0 to 89
90 to 210
≥ 211
0 to 89
90 to 210
≥ 211
0 to 89
90 to 210
≥ 211
0 to 89
90 to 210
≥ 211
0 to 89
90 to 210
≥ 211
0 to 89
90 to 210
≥ 211

Annual Statistics: Mean four-year hydroperiod

Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
Mean 4YHP
Mean 4YHP %
Mean 4YHP SD
1995298 days2%57 days285 days6%59 days153 days42%28 days72 days25%49 days188 days53%44 days138 days52%36 days29 days6%25 days
1996329 days0%45 days319 days1%53 days178 days38%49 days112 days71%66 days218 days50%64 days185 days57%88 days53 days24%46 days
1997348 days0%17 days339 days0%25 days185 days34%44 days126 days74%47 days234 days42%44 days208 days41%76 days57 days26%43 days
1998342 days0%20 days331 days0%28 days191 days37%41 days136 days82%44 days234 days37%44 days220 days33%69 days59 days29%41 days
1999343 days0%18 days332 days0%25 days200 days25%37 days127 days75%50 days242 days28%47 days237 days22%55 days48 days20%43 days
2000333 days0%12 days320 days0%14 days188 days24%27 days118 days73%35 days226 days34%33 days216 days24%28 days41 days12%30 days
2001326 days3%14 days311 days6%20 days185 days26%27 days132 days83%34 days235 days29%30 days212 days27%30 days42 days11%32 days
2002307 days4%38 days291 days10%43 days172 days28%38 days133 days83%34 days225 days32%43 days198 days31%44 days50 days11%33 days
2003297 days6%35 days279 days14%39 days166 days32%31 days139 days90%20 days209 days43%36 days195 days36%39 days56 days15%29 days
2004292 days9%31 days273 days19%32 days170 days33%35 days140 days87%22 days209 days46%36 days194 days36%38 days78 days31%68 days
2005287 days9%24 days269 days18%24 days163 days35%38 days128 days80%27 days191 days50%35 days188 days39%37 days82 days39%64 days
2006296 days6%12 days279 days11%11 days168 days35%36 days138 days84%35 days201 days46%31 days199 days33%30 days112 days76%77 days
2007297 days7%13 days280 days13%14 days160 days41%37 days124 days82%52 days194 days50%37 days187 days46%35 days105 days76%86 days
2008295 days12%21 days272 days22%28 days148 days46%24 days102 days64%52 days188 days52%32 days168 days45%36 days62 days8%80 days
2009285 days17%30 days263 days29%34 days147 days49%26 days108 days75%54 days193 days58%29 days167 days52%40 days77 days15%82 days
2010285 days14%31 days263 days24%35 days151 days48%29 days110 days80%57 days199 days56%37 days173 days49%47 days54 days9%56 days
2011289 days17%34 days265 days28%37 days160 days38%34 days128 days87%49 days222 days34%42 days185 days47%47 days80 days39%57 days
2012276 days16%37 days256 days27%37 days154 days39%34 days136 days89%36 days215 days35%46 days184 days48%45 days88 days50%43 days
2013288 days12%34 days268 days21%36 days172 days32%34 days158 days94%52 days235 days24%47 days203 days43%50 days106 days66%66 days
2014298 days11%38 days278 days19%42 days179 days31%38 days160 days95%53 days243 days25%48 days210 days42%54 days124 days87%65 days
2015293 days10%35 days275 days17%39 days172 days29%41 days152 days90%61 days239 days21%45 days203 days38%59 days110 days71%73 days
2016295 days12%31 days275 days20%39 days177 days28%36 days144 days91%74 days243 days24%39 days202 days40%62 days107 days70%77 days
2017306 days8%42 days289 days13%53 days186 days24%44 days162 days83%101 days263 days14%66 days224 days31%90 days125 days75%106 days
2018298 days10%41 days280 days16%52 days188 days28%51 days160 days89%101 days259 days15%66 days216 days36%91 days119 days72%105 days
2019301 days10%41 days285 days14%52 days205 days25%46 days195 days53%99 days272 days10%67 days241 days23%89 days140 days95%98 days
2020312 days8%32 days296 days12%41 days218 days21%31 days220 days36%61 days289 days6%46 days263 days17%59 days158 days87%73 days
2021296 days12%22 days278 days19%26 days216 days25%29 days206 days46%44 days274 days10%28 days241 days25%36 days136 days97%36 days
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Last updated: November 10, 2021 10:29 PM (BJM)