Rick Solis
Data are available for L-28 Interceptor Canal below S-190, L-28 Canal above S-140, and L-28 Interceptor South
The implementation of strategically located stream flow gaging points and associated data collection for nutrients has helped define future surface-water flow requirements and has provided valuable baseline flow data prior to the establishment of the recently constructed northern Storm Treatment Areas (STA’s 5 and 6) and the Rotenberger Wildlife Management Area. Generating continuous flow data at selected impact points for interior basins has complemented the existing eastern coastal canal discharge network, and has allowed for more accurately timed surface-water releases while providing flow and nutrient monitoring after recent STA implementation. A unique multi-agency experiment was conducted with much success with the focus on cooperation and development of new instrumentation and acoustic flow-weight auto-sampler protocols. The original data collection and processing was provided by three separate entities at each site with responsibilities originally allocated between the U.S. Geological Survey (USGS), the Seminole Tribe of Florida, and SFWMD. USGS provides calibration, analysis and processing of acoustic velocity meters (AVM’s) and side-looking Doppler systems and stage shaft encoders, SFWMD provides data loggers with real-time flow-weighted algorithms, and radio frequency (RF) telemetry instrumentation. The Seminole Tribe provides auto-sampler service and funds nutrient load analysis through the USGS Ocala Lab.
The implementation of strategically located streamflow gaging points and associated data collection for nutrients helped define future surface-water flow requirements and provided valuable baseline data prior to the establishment of the recently implemented northern Storm Treatment Areas (STA's 5 and 6) and the Rotenberger Wildlife Management Area. Generating continuous flow data at selected impact points for interior basins complemented the existing eastern canal discharge network, and allowed for more accurately timed surface-water releases while providing flow and nutrient monitoring after recent STA implementation.
A new acoustic side-looking Doppler velocity indexing system was installed at the L-28 IN site (L-28 Interceptor Canal), and data collected in tandem with the existing AVM velocity indexing system for the six month period which followed. This test along with an Acoustic Doppler Current Profiling (ADCP) calibration effort produced a new flow-rating resulting in a much more accurate and reliable total and instantaneous flow computation. Quality assurance has been, and continues to be, refined to better quantify mass balance for flows and nutrients to both reservations and WCA 3A.
Calibration and analysis of stage of flow data at two sites. Velocity rating refinement will continue as well as calibration of both the travel-time Acoustic Velocity Meter system at the L-28U site and the side-looking Doppler acoustic system at the L-28IN site. This task is to monitor telemetered velocities and channel area so real-time auto-sampler flow-weighted nutrient load volume triggers are maintained. Provisional discharges will continue to be analyzed and processed and forwarded to the Seminole/SFWMD Working Group. Final quality assured water-level and flow to be published annually in the publication, Water Resource Data, Florida, Volume 2A.
Rating calibration, analysis, processing, and publication of stage and discharge data at 2 primary flow-way sites through continuation of velocity rating refinement and calibration of both the traveltime Acoustic Velocity Meter system at the L-28U site and the side-looking Doppler acoustic system at the L-28IN site. The objectives of this task are to monitor telemetered velocities and channel area so real-time auto-sampler flow-weighted nutrient load volume triggers are maintained. Provisional discharges will continue to be analyzed and processed and forwarded to the Seminole/SFWMD Working Group. Final quality assured water-level and flow to be published annually in the publication, Water Resource Data, Florida, Volume 2A.
1) Continue calibration and refinement of both the AVM and Side-looking Doppler acoustic velocity index ratings utilizing the Acoustic Doppler Current Profiler (ADCP). Requests to the SFWMD control room will be submitted to vary pump rpm at the S-140 pump structure and to regulate the S-190 gate structures in attempts to achieve variable velocity regimes simulating expected flow rates in both the L-28 and L-28 Interceptor Canals respectively.
2) Provisional analysis and computation of provisional flows will be provided to the Seminole/SFWMD Working group for inclusion in the Eight through Ninth semi-annual Data Progress Reports produced periodically by SFWMD staff. Data quality assurance reviews will continue throughout each water year culminating in the publication of daily mean water levels and discharge for these sites in the USGS report entitled, Water Resource Data, Florida, Vol. 2A. Efforts to provide information to appropriate electronic outlets (e.g. SOFIA site) will continue.
3) Participation in the Seminole/SFWMD Working Group subcommittee will continue during the 2005 water year. This committee is committed to evaluating provisional analysis from Seminole Tribe autosamplers and combining those nutrient samples with USGS flows, coordinating troubleshooting requirements between agencies and Tribes, and developing and documenting protocols where changes in established quality assurance doctrine are required.
1. Continue calibration and refinement of both the AVM and Side-looking Doppler acoustic velocity index ratings utilizing the Acoustic Doppler Current Profiler (ADCP). Requests to the SFWMD control room will be submitted to vary pump rpm at the S-140 pump structure and to regulate the S-190 gate structures in attempts to achieve variable velocity regimes simulating expected flow rates in both the L-28 and L-28 Interceptor Canals respectively.
2. Provisional analysis and computation of provisional flows will be provided to the Seminole/SFWMD Working group for inclusion in the Ninth and Tenth semi-annual Data Progress Reports produced periodically by SFWMD staff. Data quality assurance reviews will continue throughout each water year culminating in the publication of daily mean water levels and discharge for these sites in the USGS report entitled, Water Resource Data, Florida, Vol. 2A. Efforts to provide information to appropriate electronic outlets (e.g. SOFIA site) will continue.
3. Participation in the Seminole/SFWMD Working Group subcommittee will continue during the 2006 water year. This committee is committed to evaluating provisional analysis from Seminole Tribe autosamplers and combining those nutrient samples with USGS flows, coordinating troubleshooting requirements between agencies and Tribes, and developing and documenting protocols where changes in established quality assurance doctrine are required.
Date (format YYYMMDD), Time (format HHMMSS) - for daily values, TIME is blank, Discharge or Gage height value - Discharge is reported as a mean daily value in cubic feet per second, Gage height is reported as feet referenced to mean sea level. The datum is NGVD 1929. Precision code of three-place rounding Remark code - the only valid code in these files is e - Value was edited or estimated by USGS personnel and is write-protected Flag on the data - flags are not used for daily values Data type - valid codes: C - computed, E - edited Quality-assurance flag - valid code: A - approved
U.S. Department of the Interior, U.S. Geological Survey, Center for
Coastal Geology
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