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CMHAS Projects Listing

Hydraulic studies

Boca Ciega Bay Hydraulic Investigation (1998)

Boca Ciega Bay is a heavily impacted esturary located in Pinellas County, Florida. The bay has been impacted by reduction of tidal prism from development along the shore including large areas of dredge and fill. This morphological alteration has impacted the tidal inlets that feed the bay including John's Pass and Blind Pass. The tendency of John's Pass to enlarge has undermined the bridge over the inlet resulting in a scour critical rating and a public safety concern. This study was performed to determine the interaction and long term trends of these two passes and to investigate scour tendencies of the John's Pass Bridge for normal and storm conditions. This project was funded by the Florida Department of Transportation.

Hydrologic Studies

Little Manatee River Data Collection/Basin Analysis (1999)

The Little Manatee River is located in southern Hillsborough County. This project includes the collection of streamflow data (stages and flows) and 15-minute precipitation in previously ungaged portions of the watershed. It also includes the analysis of data in support of model calibration. The work is being done for the Hillsborough County Stormwater Department as a sub-consultant task to PBSJ.

A GIS Based Multi-Scale Model for Comprehensive Water Management Evaluations (1997).

This project was funded by the Southwest Florida Water Management District which has regulatory jurisdiction over water use covering 10,000 square miles in West-Central Florida along the Gulf of Mexico. A prototype data base and supporting spatial analysis utilities (HydroGIS) were developed which provide the opportunity to transform atmospheric and hydrologic observations into parameters that are consistent with model scale. An integrated hydrologic model (FHM) was applied to a large-scale and a small-scale model domain.

Hydrologic Investigation of Phosphate Mined Upper Saddle Creek Watershed (1998).

This FIPR funded project (#95-03-118) sought to investigate hydrologic conditions (historical and proposed) of a previously mined, urbanizing basin tributary to the upper Peace River. Among the objectives of this study, was the investigation of the feasibility of creating large scale wetland mitigation and ecosystem restoration on reclaimed mine land and the reestablishment of a more historical hydrologic function of the Saddle Creek watershed. Another important objective was the demonstration of the calibration and utility of the FIPR Hydrologic Model, FHM, for large-scale mine reclamation. A supplemental contract with DEP added flood plain modeling of the upper Saddle Creek. This supplemental scope was added in response to concerns from SWFWMD as to the effects the wetland mitigation might have on areas downstream of the constructed wetlands. This report documents the findings of this investigation and is being submitted jointly to both funding agencies. It summarizes the collection of ydrologic data and current hydrologic conditions of the basin. The report describes model set-up and calibration for both the large scale domain and the near full detailed model of Saddle Creek. The modal has been utilized in a productive capacity for Hydrologic assessment of ecosystem restoration plans. Conclusions as to the best restoration alternatives and scheduling final hydrologic investigation for the engineering design phase are delayed pending agency input. A complete hydrologic and hydraulic assessment of 17 bridges in Collier County was conducted as part of a preliminary design phase for eventual replacement of these structures. Historical bridge flows measured by the U.S.G.S. for the Big Cypress Swamp, owned by the U.S. Park Service, were evaluated to determine statistical flow and storm surge probabilities for tidal and non-tidal scour calculations. This project was completed for the Florida Department of Transportation under subcontract to Volkert Engineering Inc.

Johns Pass Study (1991).

A study of erosion and deposition in John's Pass and the development of a sediment scour/deposition model for the Florida Department of Transportation.

Clearwater Pass Sediment Scour and Deposition Study (1991).

A study of bridge type and placement effects upon sediment scour and deposition in a tidal inlet leading to the design of channels and an estimate of amounts of maintenance dredging that would be required for those channels. A more clear cause and effect relation between inlet and bay geometry, winds, tides, waves, and littoral currents upon the scour and deposition in inlets evolved. Project conducted for City of Clearwater.

Clearwater Beach - Sand Key Bridge Scour Study (1988).

A model study of erosion at the existing bridge over Clearwater inlet. The study included two-dimensional hydrodynamic modeling with simple rational analysis for erodability. Based on the findings of the model study and other criteria, it was concluded that the bridge needed to be replaced. Project conducted for City of Clearwater.

Pinellas Coast Inlet Study (1987).

A mathematical modeling study was conducted to determine the effect of the possible opening of Dunedin Pass upon the stability of the remaining inlets in Clearwater Harbor. This project was completed for Pinellas County Beaches and Shores.

Willies Pass Study (1987).

A prognostication of the fate of the inlet created by hurricane Elena and the effect upon Hurricane Pass. This project was completed for Pinellas County Beaches and Shores.

Johns Pass And Blind Pass Study (1987).

A combination study of Clearwater Harbor and Boca Ciega Bay to determine the effect of opening a new inlet in the Narrows between the two bays. The stability of Johns Pass and Blind Pass were also investigated. This project was completed for Pinellas County Beaches and Shores.

 

Water Quality Studies

 

Lake Tarpon Management Model (1994)

The Lake Tarpon Management Model was developed to analyze the effects of basin land use changes on lake eutrofication. This project was funded by the Pinellas County Department of Environmental Management.

49th Street Bridge Study (1989).

This program studied the hydraulics and water quality in Tampa Bay as it would be impacted by the proposed bridge. The work was conducted for Pinellas County.

Mullet Key Study (1988).

A model was constructed for Mullet Key to study water quality as influenced by changes proposed for the release of treated wastewater. This model was later reactivated at low cost to examine further changes; illustrating an advantage of having the models online at the Center.

Tampa Wasteload Allocation Study (1984).

A major Wasteload Allocation Study (WLA) was undertaken by the Florida Department of Environmental Regulation (now Department of Environmental Protection).  USF-CMM (now CMHAS) provided the modeling effort for the study. For this study, the existing water quality model of Tampa Bay was upgraded to a state-of-the-art ecological (eutrophication) model. Nutrient cycles-P, N, algae- Chlorophyll-a, benthic exchange activity, several levels of grazing, BOD, salinity, temperature and DO were included.

TBRPC Study (1976).

A second modeling of the basin wide pollution problem was completed for TBRPC. The study area again incompassed Tampa Bay water bodies in the region including the bays and coastal areas of Pinellas County.

Tampa Bay Pollution Abatement Study (1973).

Successfully completed the first in the nation, Pollution Abatement Study and Basin Plan authorized under PL92-500. The work was undertaken for the TBRPC and paid for by U.S. EPA. The effort developed models for all of the bays in the Tampa Bay Region including Clearwater Harbor, St. Josephs Sound, Anclote, Boca Ciega, Tampa Bay and Upper Old Tampa Bay. The models included hydraulics and water quality. In 1973, the water quality model was a BOD-DO model with nutrients treated as conservative substances (a common practice at the time, now known to be quite inadequate). Salinity and heat exchange thermal models were also developed and used to site a power plant in Pinellas, Hillsborough, and Manatee Counties. Models were also developed for the bays and coastal waters of Pasco, Hillsborough, Manatee, and Sarasota Counties. This study provided the basis for an optimized system of regional waste treatment plants for the five county region

Wetland Studies

Efficiency of Wetlands for Stormwater Treatment and Management (1993).

 


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