The plan was to use the EAARL system to map shallow (less than 1.5 secchi depth) and non-turbid areas in Estero Bay and nearshore areas. The SANDS system was used in deeper areas and those which are turbid which includes the Caloosahatchee River.
Hydrological data (stage, discharge, salinity, and water temperature) were collected in 2004-2005 on the southwest Florida coast
Mark Hansen Eduardo Patino, 2006, Hydrodynamic and Bathymetric Characteristics of South Florida Estuarine and Coastal Systems.Online Links:
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.1. Longitudes are given to the nearest 0.1. Latitude and longitude values are specified in Degrees, minutes, and decimal seconds.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257.
This project was worked in conjunction with the South Florida Water Management District (SFWMD).Project personnel included Ruth Costley, Lars Soderqvist, Craig Thompson, and Jeff Woods
727 803-8747 x 3036 (voice)
727 803-2030 (FAX)
mhansen@usgs.gov
High resolution, GPS based bathymetric surveying is a proven method to map river, lake, and ocean floor elevations. Of primary interest to the South Florida Water Management District (SFWMD) is the quantification of the present day bathymetry of Caloosahatchee Estuary and Estero Bay regions. This information can be used by water management decision-makers to develop of Minimum Flows and Levels (MFL) and better preserve fragile habitats.The areas in and around the Caloosahatchee Estuary and Estero Bay Watershed have undergone dramatic increases in the rate of residential and commercial development as well as population growth during the past 15 years. As a result, a series of initiatives were proposed to balance development and environmental interests in the region. Several initiatives including the development MFL and the Southwest Florida Feasibility Study (SWFFS) necessitated the development of hydrodynamic models of coastal waters in the Caloosahatchee Estuary and Estero Bay areas. One of the important data requirements for these models was the bathymetry. The information available at this time was dated (the last complete bathymetric survey is over 100 years old) and needed to be upgraded with a new survey. In addition, recommendations of the Estero Bay and Watershed Assessment completed in November of 1999 recommended the development of a Bay hydrodynamic and water quality model. Updated river, bay, and coastal bathymetry was required for these efforts.
The area for bathymetry collection and interpretation includeed Estero Bay, Charlotte Harbor, Pine Island Sound, offshore regions of Sanibel and Captive Islands, and the Caloosahatchee and St. Lucie Rivers. In addition, a need for an Estero Bay and Charlotte Harbor estuarine mixing model was been identified by the Southwest Florida Regional Restoration Coordination Team and the Southwest Florida Feasibility Study. In order to create an accurate numerical model, current bathymetric data had to be obtained. Bathymetry data was also needed for the creation of a seagrass vision maps (a National Estuary Program (NEP) effort) and to populate the species response models created as assessment tools for several restoration programs.
The USGS has developed a hydrographic survey system specifically designed to map in very shallow water. The system can acquire data in water depths of approximately 25cm, but in practice boat/motor draft limitations prevent surveying in water depths less than 45cm.
EAARL is a new airborne lidar that provides unprecedented capabilities to bays, the nearshore shoreface, benthic habitats, coastal vegetation, and sandy beaches. The EAARL sensor suite includes a raster-scanning-water penetrating full-waveform adaptive lidar, a down-looking color digital camera, a hyperspectral scanner, and an array of precision kinematic GPS receivers which provide for sub-meter geo-referencing of each laser and hyper-spectral sample. EAARL has the unique real-time capability to detect, capture, and automatically adapt to each laser return backscatter over a large signal dynamic range and keyed to considerable variations in vertical complexity of the surface target. EAARL limited to water depths greater than 50 cm and can penetrate the water column to approximately 1.5 secchi disk depth. The lidar has a ground footprint of 30cm with vertical and horizontal accuracies equal to the SANDS system. The swath width is 250m which converts to a spatial coverage of approximately 1 laser shot per square meter.
The project would use the EAARL system to map shallow (less than 1.5 secchi depth) and non-turbid areas in Estero Bay and nearshore areas. The SANDS system would be used in deeper areas and those which are turbid which include the Caloosahatchee River.
Work planned for FY 2003-2004 includes:
1. High resolution bathymetric surveying. 2. Post processing of the benchmark and hydrographic data. 3. Storage and maintenance all data and access to this data for reproduction as needed by the SFWMD. 4. A final data package to include:
a. Hard copy plot of locations of surveyed areas.
B. Digital ASCII XYZ data in UTM Zone17, GRS80/NAD83 horizontal coordinates, and NAVD88 vertical coordinates in tabular format. The SFWMD has also asked for the data to be projected into State Plane Coordinates, Florida East Zone (ft) NAD 83, and vertical datum National Geodetic Vertical Datum of 1929 (ft).
C. Copies of raw and processed digital data files on CD-ROM
Person who carried out this activity:
727 803-8747 x 3036 (voice)
727 803-2030 (FAX)
mhansen@usgs.gov
Person who carried out this activity:
727-803-8747 ext.3036 (voice)
727-803-2032 (FAX)
mhansen@usgs.gov
The data collection component of this task has been completed and instrumentation removed. Data analysis and report preparation are underway.
Person who carried out this activity:
239 275-8448 ext. 11 (voice)
239 275-6820 (FAX)
epatino@usgs.gov
Precise differential GPS receivers are used to measure boat position and dynamic elevation, a survey quality 200 kHz depth sounder acquires water depth measurements, and a motion sensor measures heave, pitch, and roll of the boat. A measurement is collected about every 3m along a survey line. The horizontal positional accuracy of the system is +/- 4cm.
Precise differential GPS receivers are used to measure boat position and dynamic elevation. The vertical accuracy of the system is +/- 8cm.
The hydrological data were recorded every fifteen minutes for each collection site
The hydrological data from Palm River were estimated for the entire period because the index velocity meter came out of the water during low tide causing large amounts of the data to be deleted.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints: none
727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
hhenkel@usgs.gov
Hydrological Data
No warrantees are implied or explicit for the data
| Data format: | The files contain data for specific sites in format ASCII (version unknown) |
|---|---|
| Network links: |
<http://sofia.usgs.gov/exchange/10000_islands/index.html> |
727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
sofia-metadata@usgs.gov
U.S. Department of the Interior, U.S. Geological Survey
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