The Dona & Roberts Bay Basin is located within CHNEP and spans 145.6 square miles. The basin contains 64 named lakes/ponds, 26 named rivers/streams/canals and 6 named bays/bayous. The basin connects one of the five major drainage basins in Sarasota County to the Gulf of Mexico via the Venice Inlet. Significant modifications have been made to the drainage basins, principally to the main tributaries. Many of the creeks have been dammed in order to inhibit upstream flow of salt water. They are also deepened or lengthened to allow better drainage. These have resulted in a complex sedimentation and erosion pattern with substantial anthropogenic influences.
This basin is located within: Dona & Roberts Bay Watershed
View Maps / Data
CHNEP's Comprehensive Conservation and Management Plan (CCMP) identified four action plans: water quality improvement; hydrological restoration; fish, wildlife, and habitat improvement; and public engagement. Click on the interactive maps below to view data associated with these goals and actions.
Water Quality
Hydrology
Wildlife/Habitats
Resiliency/Weather
Water Quality Snapshot
The Water Quality Snapshot compares the most current water quality data to applicable water quality standards for Chlorophyll a, Phosphorus, Nitrogen, Bacteria, and Dissolved Oxygen to provide a snapshot of how a waterbody is doing. Water quality standards are outlined in Florida Administrative Code 62-302 for fresh/marine waterbodies of different types and uses. A Water Body Identification number (WBID) is an assessment unit that is intended to represent Florida’s waterbodies at the watershed or sub-watershed scale. The assessment units are drainage basins, lakes, lake drainage areas, springs, rivers and streams, segments of rivers and streams, coastal, bay and estuarine waters in Florida.
Showing water quality snapshots for 1 out of 18 WBIDs. View data for all WBIDs
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2002B - LYONS BAY
View Detailed Data About the Following Topics:
Geography
Recreation
Find maps and waterway navigation guides, descriptions of facilities and recreational amenities, as well as warnings and restrictions pertaining to their use.
PHOTOS
RELATED INFORMATION
2 Year Graph
10 Year Graph
Seasonal Variation Graph
Graph Details and Help
Water quality data is displayed as a scatter-plot with data from individual sampling events displayed by date, for the previous two- and ten-year periods. Data from all available sources are plotted together. Clicking on a graph will open a larger version of it. To view/download data older than ten years, or to view/download data from individual data source(s), click the "Download Data" icon or button.
The scale used is chosen to accommodate typical values for the water quality parameter being graphed. Units are shown on the y-axis and in the graph title.
Graphs are generated and stored in the Water Atlas database on a periodic basis using an automated process. The date when the graph was created is shown.
The Seasonal Variation Graph displays a statistical summary of data from all available data sources for the entire period of record. It is used to illustrate typical variation in the selected water quality parameter from month to month during the year. The diagram below shows how to read the graph:
The median value is shown. Although not specifically marked on the graph, the mean (average) value is midway between the 25th and 75th percentiles.
The "whiskers" indicate the range of the sample values; those that are outside pre-defined "Minimum" and "Maximum" values are excluded. Sample data less than the Minimum or greater than the Maximum are considered to be outliers and are not displayed on the graph.