Alternative Text Description for SJRWMD Springsheds

TABLE OF CONTENTS

MAP OVERVIEW

This map displays springsheds within the St. Johns River Water Management District (SJRWMD) service area in Florida. Springsheds are the geographic areas that contribute groundwater recharge to springs. The map shows multiple discrete springshed boundaries represented as irregular polygons with varying shades of blue, indicating the watershed areas that feed specific springs in the region. This information is critical for understanding groundwater flow patterns and protecting spring water quality.

GEOGRAPHIC CONTEXT

The map covers central Florida within the SJRWMD jurisdiction. Visible reference locations include Orlando in the south-central portion, Kissimmee in the south, Palm Coast and Daytona Beach along the east coast, Leesburg in the central area, Eustis south of a large western springshed, cities including Ocala and DeLand (labeled as "Dellona"), and Gainesville in the northwest. The map shows an area extending from the Atlantic coast inland to the west, encompassing significant portions of central and northeast Florida. County boundaries appear as gray outlines throughout the mapped area.

KEY INSIGHTS

The map reveals that springsheds are not uniformly distributed across the SJRWMD area but occur in distinct geographic clusters. The largest and most prominent springshed occupies a substantial area in the western portion of the district, northwest of Leesburg and west of Ocala. A complex cluster of overlapping and adjacent springsheds exists in the central region between Leesburg and Orlando, with multiple nested or adjoining watershed boundaries creating an intricate pattern. Two separate springsheds appear in the eastern portion near DeLand and DeLeon, positioned between the central cluster and the coast. The springsheds vary considerably in size, from the expansive western feature to smaller, more compact areas in the east. Large portions of the mapped area, particularly around Orlando, along the coast, and in the southern region near Kissimmee, contain no mapped springsheds, indicating these areas do not contribute to spring recharge within the modeled system.

VISUAL ELEMENTS

SJRWMD Springsheds

This layer represents the groundwater recharge areas (springsheds) that contribute water to springs managed by the St. Johns River Water Management District.

Springshed Polygons (blue shaded areas with varying intensities)

Appearance:

Irregular polygons filled with blue shading ranging from lighter blue-violet to deeper blue tones. The variation in shading appears to represent overlapping springshed boundaries or different modeling confidence levels. Polygon boundaries are smooth and curved, reflecting the natural contours of groundwater flow patterns.

Distribution:

Springsheds are concentrated in three main geographic areas: a large feature in the northwestern section west of Ocala, a complex central cluster between Leesburg and Orlando, and two separate features in the eastern area near DeLand.

Notable locations:

The largest single springshed extends across the western portion of the map, encompassing a vast area northwest of Leesburg. The most complex concentration of springsheds occurs in the central region, where multiple watershed boundaries overlap and intersect, creating a patchwork of different blue intensities. Two isolated springsheds appear east of the central cluster near DeLand and DeLeon. A linear springshed feature extends southward from the central cluster toward the Orlando area.

Spatial patterns:

Springsheds follow irregular, organic shapes that reflect subsurface geological structures and groundwater flow directions. The central cluster shows considerable overlap, suggesting that multiple springs draw from interconnected or nested groundwater basins. The western springshed's large size indicates a major groundwater collection area feeding one or more significant springs. Springsheds do not correlate directly with surface water drainage patterns visible in the base map, as they represent subsurface hydrogeological boundaries rather than surface topography.

Overlapping Patterns

In the central region between Leesburg, Eustis, and the area north of Orlando, multiple springshed boundaries overlap, creating areas of varying blue intensity. These overlapping zones may represent areas where groundwater contributes to multiple springs, zones of modeling uncertainty, or nested watersheds where smaller springsheds exist within larger ones. The darker blue areas in this central cluster indicate zones of overlap or greater springshed depth.

SYMBOL GUIDE

ADDITIONAL INFORMATION

This map represents springsheds derived from multiple modeling techniques combined into a single composite layer. The original data consisted of ten separate shapefiles from SJRWMD, each with its own modeling methodology and metadata. The varying shades of blue may reflect different modeling approaches, confidence levels, or temporal versions of springshed delineations. The presence of overlapping boundaries in the central region suggests complex hydrogeological relationships where groundwater flow patterns interact. Areas without springshed coverage do not necessarily lack springs but may indicate areas where springshed modeling has not been completed or where springs are not present within the SJRWMD jurisdiction. For detailed information about individual springsheds and their specific modeling methodologies, users should reference the original metadata from SJRWMD for each component shapefile.

DATA CONTEXT

Data Source:

This data was originally produced by the St. Johns River Water Management District (SJRWMD) using a variety of different modeling techniques to delineate groundwater recharge areas for springs. The data was downloaded in ten different shapefiles from SJRWMD and merged into one layer. Each original shapefile had unique metadata documenting its specific modeling approach. Data source layer name: SJRWMD_SPRINGSHEDS_2013.

Definition Query:

No definition query or filter criteria was applied to this dataset.

Scale Information:

The map scale and zoom level show regional coverage suitable for understanding the broad distribution of springsheds across the SJRWMD area. This scale is appropriate for regional planning and management but may not show fine-scale details of individual springshed boundaries.

Coordinate System:

NAD 1983 HARN Florida GDL Albers (WKID 3087).

Time Period of Content:

The dataset name indicates a 2013 compilation date, though individual component springsheds may have been modeled at different times.

Limitations:

This merged dataset combines springsheds developed using different modeling techniques and methodologies, which may result in inconsistencies in boundary precision or modeling assumptions between different springsheds. Users should reference the original SJRWMD metadata for each individual springshed to understand the specific modeling approach, data sources, and limitations for features of interest. The composite nature of this dataset means that boundary precision, modeling confidence, and data vintage may vary across different springsheds shown on the map.

Map Coverage:

The map extends across the St. Johns River Water Management District jurisdiction in central and northeast Florida, from the Atlantic coast westward to approximately the western boundary of the district, and from north of Gainesville southward to the Kissimmee area.

The alternative text description of this map was AI-generated and may contain inaccuracies.