HDC Projects
TAMPA BAY WATER STREAMFLOW
Client: Tampa Bay Water
Location: C.W. Bill Young Regional Reservoir and Cone Ranch, Hillsborough County, FL
Scope: drainage basin assessment
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC conducted discharge measurements at stations at the C.W. Bill Young Regional Reservoir and stations in the Cone Ranch well field in Hillsborough County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. The Reservoir stations are monitored to determine long term changes in streamflow characteristics as the result of the development of the reservoir. The Cone Ranch stations are being monitored to establish a long term record of undeveloped drainage basin streamflow characteristics. All work is conducted using USGS standards and techniques.
SARASOTA COUNTY STREAMFLOW
Client: Sarasota County Natural Resource Management
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: Mabry Carlton Reserve, Sarasota County, FL
Scope: watershed management planning
Services Provided: tidal and non-tidal discharge monitoring; stage vs. discharge ratings
Project Description: HDC conducted discharge measurements at stage versus discharge stations in the Mabry Carlton Reserve and stage versus discharge stations and acoustic velocity meter stations associated with the County ARM’s streamflow program. Developed discharge ratings for both tidally-influenced and non-tidal streams. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge data at these stations are being used to develop and monitor the results of comprehensive watershed management plans put in place by Sarasota County. All work is conducted using USGS standards and techniques.
ANCLOTE RIVER BASIN STREAMFLOW AND RAINFALL
Client: Florida Department of Transportation
Sub-Consultant to: PBS&J
Location: Hillsborough County, FL
Scope: stormwater management planning
Services Provided: discharge and rainfall monitoring; stage vs. discharge ratings
Project Description: HDC installed and maintained stage versus discharge stations along with rain gages required to conduct discharge measurements in Hillsborough County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge data are being collected to determine the capacity of existing culverts to handle increased runoff as a result of recent development in the basin. All work is conducted using USGS standards and techniques.
JAMES CITY COUNTY STREAMFLOW AND WATER QUALITY
Client: James City County
Location: Cow Swamp and Mill Creek in James City County, VA
Scope: drainage basin assessment
Services Provided: environmental services related to establishing stage vs. discharge ratings, flow duration curves, and determining suspended solid loads in the Cow Swamp and Mill Creek basins
Project Description: Conducted discharge measurements to be used in the development of a stage versus discharge ratings. Use the stage versus discharge rating to compute unit (15-minute) and daily discharge values. Develop flow duration curves using the available discharge data. Collect total suspended solid samples and continuous turbidity data over the range of discharge. Develop a load duration curve for total suspended solids. Develop a regression equation to determine if the correlation between turbidity and total suspended solids (TSS). Compute TSS loads using the regression equation and compare results to the lab results.
SPA CONSTRUCTION MONITORING AT SHADY GROVE ADVENTIST HOSPITAL
Client: Loiederman Soltesz Associates, Inc.
Location: Shady Grove Adventist Hospital in Rockville, MD
Scope: stormwater management planning
Services Provided: The monitored BMP’s included two sand filters that were converted from sediment traps. Chemical sampling was accomplished by the collection of stormwater at one inflow location and one outflow location at each sand filter using automated samplers and velocity meters. Rainfall amounts were recorded using a tipping bucket rain gauge located on site. Loads were computed for each inflow and outflow point to determine the efficiency of each sand filter.
Project Description: The purpose of the monitoring was to evaluate the efficiency and effectiveness of BMP structures for stormwater within a Special Protection Area (SPA) on the site, in accordance with Montgomery County Department of Environmental Protection {DEP) Best Management Practice (BMP) protocols. The effort began post-construction and data were obtained by monitoring chemical samples from two sand filters located adjacent to the Shady Grove Adventist Hospital Aquilino Cancer Center.
ALACHUA COUNTY STREAMFLOW AND RAINFALL
Client: Alachua County Department of Environmental Protection
Location: Alachua County, FL
Scope: TMDL development and stormwater management
Services Provided: discharge and rainfall monitoring; stage vs. discharge ratings
Project Description: HDC installed, maintained and conducted discharge measurements at discharge stations and rain gages in Alachua County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge and rainfall data are being used by Alachua County to develop TMDL’s and for stormwater modeling. All work is conducted using USGS standards and techniques.
KING ENGINEERING STREAMFLOW AND RAINFALL
Client: King Engineering
Location: Hillsborough County, FL
Scope: drainage basin assessment
Services Provided: crest stage, discharge and rainfall monitoring, stage vs. discharge ratings
Project Description: HDC installed, maintained and conducted discharge measurements at discharge stations and crest stage gages and service and monitor rain gages in Hillsborough County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge data are being used to monitor the change in runoff characteristics as land use in the drainage basin changes from rural to urban. All work is conducted using USGS standards and techniques.
PINELLAS COUNTY STREAMFLOW
Client: Pinellas County Department of Environmental Management
Location: Pinellas County, FL
Scope: TMDL development and stormwater management
Services Provided: water quality monitoring
Project Description: HDC installed and maintained stage versus discharge stations in Pinellas County as a part of the County modified NPDES and water quality studies. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge and rainfall data are being used by the County to develop TMDL’s and for stormwater modeling. All work is conducted using USGS standards and techniques.
EGANS CREEK WATER QUALITY
Client: Florida Department of Transportation
Sub-Consultant to: PBS&J
Location: Fernandina Beach, FL
Scope: saltwater impact study
Services Provided: water quality monitoring
Project Description:HDC is responsible for the installation, and continued operation, calibration and maintenance of real-time water quality monitoring stations equipped with CDMA telemetry. Sensors monitor: stage, temperature, conductance and salinity. The purpose of the monitoring is to determine under what conditions saline water may move upstream and into an environmentally sensitive area. All parameters are provided exclusively to FL DOT personal real-time on HDC’s secure web hosting site..
KINGS BAY SPRINGS
Client: Southwest Florida Water Management District
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: Kings Bay, Crystal River, FL
Scope: flow modeling and springs assessment
Services Provided: springs inventory and discharge monitoring
Project Description:HDC located, inventoried and measured discharge at submerged spring vents in Kings Bay, Crystal River, Florida. Discharge measurements were conducted using standard and non-standard techniques and methods including different types of acoustic velocity meters. The purpose of the measurements was to determine the location and discharge of the numerous submerged springs in the Kings Bay/Crystal River area of Florida. The results are to be used by the Water Management District to develop a flow model of the area.
McINTOSH PARK ENHANCED STORMWATER TREATMENT WETLAND BEST MANAGEMENT PRACTICE (BMP)
Client: Southwest Florida Water Management District
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: McIntosh Park, Eastside Canal sub-basin of the Hillsborough River watershed near Plant City, FL
Scope: stormwater BMP efficiency assessment
Services Provided: discharge water quality monitoring; stage vs. discharge ratings; stormwater sampling
Project Description:HDC located, inventoried and measured discharge at submerged spring vents in Kings Bay, Crystal River, Florida. Discharge measurements were conducted using standard and non-standard techniques and mesults are to be used by the Water Management District to develop a flow model of the area.
McINTOSH PARK ENHANCED STORMWATER TREATMENT WETLAND BEST MANAGEMENT PRACTICE (BMP)
Client: Southwest Florida Water Management District
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: McIntosh Park, Eastside Canal sub-basin of the Hillsborough River watershed near Plant City, FL
Scope: stormwater BMP efficiency assessment
Services Provided: discharge water quality monitoring; stage vs. discharge ratings; stormwater sampling
Project Description: HDC installed, operated and maintained real-time stage versus discharge, water quality monitoring and storm water sampling stations. The stations provided real-time data access through CDMA telemetry and were automated for remote triggering for storm-event sampling based on stage. Continuously monitored and calculated parameters included: pH, conductance, dissolved oxygen, dissolved oxygen percent saturation, turbidity, and temperature. Discharge measurements were conducted to develop stage versus discharge ratings. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics. The project was designed to evaluate three different stormwater treatment Best Management Practices (BMPs)—sediment sump, created wetland and alum injection—in succession. The sediment sump has a surface area of 6 acres, a depth of 10 ft, and a water volume of 39 ac-ft. The wetland treatment system consists of a relatively long series of intermittent deeper pools with a surface area of 45 acres and a water volume of 53 ac-ft. Water discharges from the wetland system through a box culvert where alum is injected prior to entering the flocculation (floc) settling ponds. The alum treated stormwater passed through three floc ponds (approximately 3.5 acres) that promote settling of the alum floc and entrained nutrients. Water discharges from the eastern end of the floc pond through the discharge canal into the Eastside Canal. All work was conducted using USGS standards and techniques. Stormwater samples were collected and delivered to a certified laboratory for further analysis.
ST. JOHNS RIVER WATER MANAGEMENT DISTRICT STREAMFLOW
Client: St. Johns River Water Management District
Location: 18 counties in Northeast and East-Central Florida
Scope: river basin assessment
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC operated and maintained a streamflow network for the St. Johns River Water Management District. Conducted discharge measurements which were used to develop stage versus discharge ratings at continuous daily discharge stations, acoustic velocity meter stations and springs. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. The network of monitoring stations was designed to develop long term streamflow and runoff characteristics of streams in the St Johns River basin. All work was conducted using USGS standards and techniques.
SUWANNEE RIVER STREAMFLOW
Client: Suwannee River Water Management District
Location: Suwannee River basin, FL
Scope: river basin assessment
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC operated and maintained a streamflow network in the Suwannee River Basin. Conducted discharge measurements which were used to develop stage versus discharge ratings at 24 stages versus discharge stations in the Suwannee River basin. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. The purpose of this network of stations is to develop long term streamflow and runoff characteristics of streams in the Suwannee River basin. All work was conducted using USGS standards and techniques.
STARKEY AND MORRIS BRIDGE WELLFIELDS
Client: Southwest Florida Water Management District
Location: Hillsborough and Pasco Counties, FL
Scope: aquifer characterization
Services Provided: groundwater level monitoring
Project Description: HDC is responsible for the data collection of piezometer wells twice monthly in Starkey and Morris Bridge wellfields. Water level data was used by water managers to determine water availability and recharge rates of the Floridian aquifer—one of the worlds most productive aquifers. The Floridian Aquifer is a coastal artesian aquifer which stretches across five states in the Southeastern US and provides water to several large cities in Florida and Georgia.
MANATEE COUNTY STREAMFLOW
Client: Manatee County Environmental Management Department
Location: Manatee County, FL
Scope: TMDL development and stormwater management
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC installed maintained and conducted discharge measurements at stations in Manatee County, including Bowlees Creek, Cedar Creek, Cooper Creek, Hickory Creek, Nonsense Creek and Rattlesnake Creek. Discharge measurements were conducted to develop stage versus discharge ratings. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge and rainfall data are being used by the County to develop TMDL’s and for stormwater modeling. All work was conducted using USGS standards and techniques.
COW PEN SLOUGH STREAMFLOW AND RAINFALL
Client: PBS&J
Location: Sarasota County, FL
Scope: drainage basin assessment
Services Provided: discharge and rainfall monitoring; stage vs. discharge ratings
Project Description: HDC is responsible for the installation, operation and maintenance of stage versus discharge stations and rain gages on Cow Pen Slough in Sarasota County. Discharge measurements were conducted to develop stage versus discharge ratings. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. All work was conducted using USGS standards and techniques.
Client: Tampa Bay Water
Location: C.W. Bill Young Regional Reservoir and Cone Ranch, Hillsborough County, FL
Scope: drainage basin assessment
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC conducted discharge measurements at stations at the C.W. Bill Young Regional Reservoir and stations in the Cone Ranch well field in Hillsborough County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. The Reservoir stations are monitored to determine long term changes in streamflow characteristics as the result of the development of the reservoir. The Cone Ranch stations are being monitored to establish a long term record of undeveloped drainage basin streamflow characteristics. All work is conducted using USGS standards and techniques.
SARASOTA COUNTY STREAMFLOW
Client: Sarasota County Natural Resource Management
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: Mabry Carlton Reserve, Sarasota County, FL
Scope: watershed management planning
Services Provided: tidal and non-tidal discharge monitoring; stage vs. discharge ratings
Project Description: HDC conducted discharge measurements at stage versus discharge stations in the Mabry Carlton Reserve and stage versus discharge stations and acoustic velocity meter stations associated with the County ARM’s streamflow program. Developed discharge ratings for both tidally-influenced and non-tidal streams. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge data at these stations are being used to develop and monitor the results of comprehensive watershed management plans put in place by Sarasota County. All work is conducted using USGS standards and techniques.
ANCLOTE RIVER BASIN STREAMFLOW AND RAINFALL
Client: Florida Department of Transportation
Sub-Consultant to: PBS&J
Location: Hillsborough County, FL
Scope: stormwater management planning
Services Provided: discharge and rainfall monitoring; stage vs. discharge ratings
Project Description: HDC installed and maintained stage versus discharge stations along with rain gages required to conduct discharge measurements in Hillsborough County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge data are being collected to determine the capacity of existing culverts to handle increased runoff as a result of recent development in the basin. All work is conducted using USGS standards and techniques.
JAMES CITY COUNTY STREAMFLOW AND WATER QUALITY
Client: James City County
Location: Cow Swamp and Mill Creek in James City County, VA
Scope: drainage basin assessment
Services Provided: environmental services related to establishing stage vs. discharge ratings, flow duration curves, and determining suspended solid loads in the Cow Swamp and Mill Creek basins
Project Description: Conducted discharge measurements to be used in the development of a stage versus discharge ratings. Use the stage versus discharge rating to compute unit (15-minute) and daily discharge values. Develop flow duration curves using the available discharge data. Collect total suspended solid samples and continuous turbidity data over the range of discharge. Develop a load duration curve for total suspended solids. Develop a regression equation to determine if the correlation between turbidity and total suspended solids (TSS). Compute TSS loads using the regression equation and compare results to the lab results.
SPA CONSTRUCTION MONITORING AT SHADY GROVE ADVENTIST HOSPITAL
Client: Loiederman Soltesz Associates, Inc.
Location: Shady Grove Adventist Hospital in Rockville, MD
Scope: stormwater management planning
Services Provided: The monitored BMP’s included two sand filters that were converted from sediment traps. Chemical sampling was accomplished by the collection of stormwater at one inflow location and one outflow location at each sand filter using automated samplers and velocity meters. Rainfall amounts were recorded using a tipping bucket rain gauge located on site. Loads were computed for each inflow and outflow point to determine the efficiency of each sand filter.
Project Description: The purpose of the monitoring was to evaluate the efficiency and effectiveness of BMP structures for stormwater within a Special Protection Area (SPA) on the site, in accordance with Montgomery County Department of Environmental Protection {DEP) Best Management Practice (BMP) protocols. The effort began post-construction and data were obtained by monitoring chemical samples from two sand filters located adjacent to the Shady Grove Adventist Hospital Aquilino Cancer Center.
ALACHUA COUNTY STREAMFLOW AND RAINFALL
Client: Alachua County Department of Environmental Protection
Location: Alachua County, FL
Scope: TMDL development and stormwater management
Services Provided: discharge and rainfall monitoring; stage vs. discharge ratings
Project Description: HDC installed, maintained and conducted discharge measurements at discharge stations and rain gages in Alachua County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge and rainfall data are being used by Alachua County to develop TMDL’s and for stormwater modeling. All work is conducted using USGS standards and techniques.
KING ENGINEERING STREAMFLOW AND RAINFALL
Client: King Engineering
Location: Hillsborough County, FL
Scope: drainage basin assessment
Services Provided: crest stage, discharge and rainfall monitoring, stage vs. discharge ratings
Project Description: HDC installed, maintained and conducted discharge measurements at discharge stations and crest stage gages and service and monitor rain gages in Hillsborough County. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge data are being used to monitor the change in runoff characteristics as land use in the drainage basin changes from rural to urban. All work is conducted using USGS standards and techniques.
PINELLAS COUNTY STREAMFLOW
Client: Pinellas County Department of Environmental Management
Location: Pinellas County, FL
Scope: TMDL development and stormwater management
Services Provided: water quality monitoring
Project Description: HDC installed and maintained stage versus discharge stations in Pinellas County as a part of the County modified NPDES and water quality studies. Discharge measurements are conducted to develop stage versus discharge ratings. The discharge ratings are applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge and rainfall data are being used by the County to develop TMDL’s and for stormwater modeling. All work is conducted using USGS standards and techniques.
EGANS CREEK WATER QUALITY
Client: Florida Department of Transportation
Sub-Consultant to: PBS&J
Location: Fernandina Beach, FL
Scope: saltwater impact study
Services Provided: water quality monitoring
Project Description:HDC is responsible for the installation, and continued operation, calibration and maintenance of real-time water quality monitoring stations equipped with CDMA telemetry. Sensors monitor: stage, temperature, conductance and salinity. The purpose of the monitoring is to determine under what conditions saline water may move upstream and into an environmentally sensitive area. All parameters are provided exclusively to FL DOT personal real-time on HDC’s secure web hosting site..
KINGS BAY SPRINGS
Client: Southwest Florida Water Management District
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: Kings Bay, Crystal River, FL
Scope: flow modeling and springs assessment
Services Provided: springs inventory and discharge monitoring
Project Description:HDC located, inventoried and measured discharge at submerged spring vents in Kings Bay, Crystal River, Florida. Discharge measurements were conducted using standard and non-standard techniques and methods including different types of acoustic velocity meters. The purpose of the measurements was to determine the location and discharge of the numerous submerged springs in the Kings Bay/Crystal River area of Florida. The results are to be used by the Water Management District to develop a flow model of the area.
McINTOSH PARK ENHANCED STORMWATER TREATMENT WETLAND BEST MANAGEMENT PRACTICE (BMP)
Client: Southwest Florida Water Management District
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: McIntosh Park, Eastside Canal sub-basin of the Hillsborough River watershed near Plant City, FL
Scope: stormwater BMP efficiency assessment
Services Provided: discharge water quality monitoring; stage vs. discharge ratings; stormwater sampling
Project Description:HDC located, inventoried and measured discharge at submerged spring vents in Kings Bay, Crystal River, Florida. Discharge measurements were conducted using standard and non-standard techniques and mesults are to be used by the Water Management District to develop a flow model of the area.
McINTOSH PARK ENHANCED STORMWATER TREATMENT WETLAND BEST MANAGEMENT PRACTICE (BMP)
Client: Southwest Florida Water Management District
Sub-Consultant to: Vanasse Hangen Brustlin, Inc.
Location: McIntosh Park, Eastside Canal sub-basin of the Hillsborough River watershed near Plant City, FL
Scope: stormwater BMP efficiency assessment
Services Provided: discharge water quality monitoring; stage vs. discharge ratings; stormwater sampling
Project Description: HDC installed, operated and maintained real-time stage versus discharge, water quality monitoring and storm water sampling stations. The stations provided real-time data access through CDMA telemetry and were automated for remote triggering for storm-event sampling based on stage. Continuously monitored and calculated parameters included: pH, conductance, dissolved oxygen, dissolved oxygen percent saturation, turbidity, and temperature. Discharge measurements were conducted to develop stage versus discharge ratings. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics. The project was designed to evaluate three different stormwater treatment Best Management Practices (BMPs)—sediment sump, created wetland and alum injection—in succession. The sediment sump has a surface area of 6 acres, a depth of 10 ft, and a water volume of 39 ac-ft. The wetland treatment system consists of a relatively long series of intermittent deeper pools with a surface area of 45 acres and a water volume of 53 ac-ft. Water discharges from the wetland system through a box culvert where alum is injected prior to entering the flocculation (floc) settling ponds. The alum treated stormwater passed through three floc ponds (approximately 3.5 acres) that promote settling of the alum floc and entrained nutrients. Water discharges from the eastern end of the floc pond through the discharge canal into the Eastside Canal. All work was conducted using USGS standards and techniques. Stormwater samples were collected and delivered to a certified laboratory for further analysis.
ST. JOHNS RIVER WATER MANAGEMENT DISTRICT STREAMFLOW
Client: St. Johns River Water Management District
Location: 18 counties in Northeast and East-Central Florida
Scope: river basin assessment
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC operated and maintained a streamflow network for the St. Johns River Water Management District. Conducted discharge measurements which were used to develop stage versus discharge ratings at continuous daily discharge stations, acoustic velocity meter stations and springs. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. The network of monitoring stations was designed to develop long term streamflow and runoff characteristics of streams in the St Johns River basin. All work was conducted using USGS standards and techniques.
SUWANNEE RIVER STREAMFLOW
Client: Suwannee River Water Management District
Location: Suwannee River basin, FL
Scope: river basin assessment
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC operated and maintained a streamflow network in the Suwannee River Basin. Conducted discharge measurements which were used to develop stage versus discharge ratings at 24 stages versus discharge stations in the Suwannee River basin. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. The purpose of this network of stations is to develop long term streamflow and runoff characteristics of streams in the Suwannee River basin. All work was conducted using USGS standards and techniques.
STARKEY AND MORRIS BRIDGE WELLFIELDS
Client: Southwest Florida Water Management District
Location: Hillsborough and Pasco Counties, FL
Scope: aquifer characterization
Services Provided: groundwater level monitoring
Project Description: HDC is responsible for the data collection of piezometer wells twice monthly in Starkey and Morris Bridge wellfields. Water level data was used by water managers to determine water availability and recharge rates of the Floridian aquifer—one of the worlds most productive aquifers. The Floridian Aquifer is a coastal artesian aquifer which stretches across five states in the Southeastern US and provides water to several large cities in Florida and Georgia.
MANATEE COUNTY STREAMFLOW
Client: Manatee County Environmental Management Department
Location: Manatee County, FL
Scope: TMDL development and stormwater management
Services Provided: discharge monitoring; stage vs. discharge ratings
Project Description: HDC installed maintained and conducted discharge measurements at stations in Manatee County, including Bowlees Creek, Cedar Creek, Cooper Creek, Hickory Creek, Nonsense Creek and Rattlesnake Creek. Discharge measurements were conducted to develop stage versus discharge ratings. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. Discharge and rainfall data are being used by the County to develop TMDL’s and for stormwater modeling. All work was conducted using USGS standards and techniques.
COW PEN SLOUGH STREAMFLOW AND RAINFALL
Client: PBS&J
Location: Sarasota County, FL
Scope: drainage basin assessment
Services Provided: discharge and rainfall monitoring; stage vs. discharge ratings
Project Description: HDC is responsible for the installation, operation and maintenance of stage versus discharge stations and rain gages on Cow Pen Slough in Sarasota County. Discharge measurements were conducted to develop stage versus discharge ratings. The discharge ratings were applied to the recorded gage heights with appropriate stage shifts and datum corrections to compute instantaneous and daily values of discharge and monthly and annual runoff statistics using each stream’s drainage area. All work was conducted using USGS standards and techniques.