The Myakka River Water Quality Monitoring Update

Transcription

1 The Myakka River Water Quality Monitoring Update Myakka River Management Coordinating Council January 22, 1010 Kathryn L. Meaux Environmental Specialist III Sarasota County Integrated Water Resources

2 Historical Monitoring Mote Marine Bay Monitoring Contract: Myakka River Sampling segments ( Upper/ Lower) with 12 sample points (1 sample sets/yr) segments consolidated into with 12 sample points (60 sample sets/yr) River monitoring eliminated from Bay contract

3 Sarasota County Monitoring County staff began monitoring in November 07 Monitoring 12 Stations: river sites and 7 tributary sites 144 annual sample events; 184 data sets 26 months of data

4 Sarasota County Monitoring Parameters: Total Suspended Solids (TSS), Turbidity, Biochemical Oxygen Demand (BOD), Nitrate+Nitrite Nitrogen (Nox), Ammonia Nitrogen (NH3), Total Kjeldahl Nitrogen (TKN), Orthophosphate (PO4), Total Nitrogen (TN), Total Phosphorus (TP), Fecal Coliform, Chlorophyll а, Color, and Iron (only in WBID 1981B). Field Measurements: Water Temperature ( C), Salinitiy (ppt), Specific Conductance (mmhos/cm), Dissolved Oxygen Saturation (%), Dissolved Oxygen (mg/l), and ph.

5 Monitoring Stations STA_ID Short_Name Location MYA Myakka River Bridge at Myakka Rd. North of State Park, Miakka City CLG Clay Gully Bridge in Myakka River State Park HWC Howard Creek Bridge at Rocking Horse Lane, Myakka Valley Trails, Sarasota MYA-B Myakka River Upstream of Bridge at State Road 72 in park, Sarasota BGS-A Big Slough Bridge at State Road 72, Sarasota MYA-F Myakka River Bridge at Border Road, Venice BGS-B Big Slough Bridge on Tropiaire; East of I7;North Port BBC Blackburn Canal Bridge on Jackson Rd.; North of Venice Ave.; Venice MYA-C Myakka River Snook Haven, Venice Ave., Venice; ARMS Station DPS Deer Prairie Slough DPC Preserve; North of US41; North Port WMS Little Salt Canal Ortiz Blvd. across from the Warm Mineral Springs MYA-E Myakka River Bridge at US41;North Port;West Side

6 Myakka River Watershed Monitoring Stations (! (! (! (! (! (! (! (! (! (! (! (!

7 Myakka River Monitoring: North County Sites

8 Myakka River Monitoring: Central County Sites

9 Myakka River Monitoring: South County Sites

10 FDEP VERIFIED AND DRAFT IMPAIRED WATERBODIES WBID WATER SEGMENT NAME WATERBODY TYPE WATERBODY CLASS PARAMETER YEAR 1869B Upper Myakka River Stream 3F Fecal Coliform Bud Slough Stream 3F Fecal Coliform 1967 Bud Slough Stream 3F Dissolved Oxygen 1877A Upper Myakka River Stream 3F Fecal Coliform A Upper Myakka River Stream 3F Total Coliforms C Myakka River (North Fork) Stream 1 Mercury in Fish Tissue 198 Mud Lake Slough Stream 3F Total Coliforms 1972 Myakka River at Clay Gully Stream 3F Mercury in Fish Tissue 1978 Deer Prairie Creek Stream 3F Iron 4c 1981 Lake Myakka (Lower Segment) Lake 1 Mercury in Fish Tissue 1981B Myakka River Stream 1 Dissolved Oxygen B Myakka River Stream 1 Nutrients (Chl a) B Lower Myakka river Stream 1 Mercury in Fish Tissue 1981C Lake Myakka (Upper Segment) Lake 1 Mercury in Fish Tissue 1981C Lake Myakka (Upper Segment) Lake 1 Nutrients (TSI) 1991 D Myakka River Stream 3F Dissolved Oxygen 4d 1991 D Myakka River Stream 3F Mercury in Fish Tissue 1991 D Myakka River Stream 3F Nutrients (Chl a) 1991C Lower Myakka River Estuary 2 Mercury in Fish Tissue 1991 A Lower Myakka River Estuary 2 Mercury in Fish Tissue 1991 B Lower Myakka River Estuary 2 Mercury in Fish Tissue 1991 B Lower Myakka River Estuary 2 Nutrients (Chl a) 26 Little Salt Creek (Warm Mineral Springs) Estuary 3M Mercury in Fish Tissue Manatee County WBIDs Sarasota/Manatee WBIDs Sarasota County WBIDs Sarasota/Charlotte WBIDs CATEGORY 09

11 TMDL WBIDs of Concern WBID WATER SEGMENT NAME 1869B Upper Myakka River 1967 Bud Slough 1967 Bud Slough 1877A Upper Myakka River 1877A Upper Myakka River 1877C Myakka River (North Fork) 198 Mud Lake Slough 1972 Myakka River at Clay Gully 1978 Deer Prairie Creek 1981 Lake Myakka (Lower Segment) 1981B Myakka River 1981B Myakka River 1981B Lower Myakka river 1981C Lake Myakka (Upper Segment) 1981C Lake Myakka (Upper Segment) 1991 D Myakka River 1991 D Myakka River 1991 D Myakka River 1991C Lower Myakka River 1991 A Lower Myakka River 1991 B Lower Myakka River 1991 B Lower Myakka River 26 Little Salt Creek (Warm Mineral Springs)

12 MY A CLG MY A -B / 22 / 24 / / / /2 0 2/ /29 9 /2 10 3/ 0/ 0/ 0/ 8/ 2/ 8 // 7 /2 6 /3 /2 4 /3 3 /1 2 /1 /2 0 /2 0 1/ / 11 / /2 0 6/ 4/ 7/ 0/ 2/ 4/ 0/ 9/ / 16 1 / /1 8 /1 7 /1 6/ 3 /2 4 /2 3 /2 2 /1 /2 0 3/ / 12 1 /2 12 Iron (mg/l) M YA K K A R IV ER W A T ER S H ED - IR O N

13 100 22,000 8,000 M YA K K A R IV ER W A T ER S H ED - F EC A L C O L IF O R M M IN./M A X./M ED IA N Fecal Coliform (#col/100ml) M YA 10 CLG HW C 30 M YA -B 10 BG S-A M Y A -F 40 BG S -B 40 BBC 0 M Y A -C 10 DP S 10 WM S 30 M YA -E

14 MYAKKA RIVER WATERSHED - FECAL COLIFORM Percent Below and Above 400 col/100ml 12% 90% 27% 3% 80% 42% 46% 70% 38% 4% 3% 0% 62% 69% 60% 81% 0% 88% 40% 73% 6% 30% 8% 4% % 62% 96% 6% 0% 38% 31% 10% 19% 0% M YA CLG HWC M YA-B BGS-A M YA-F BGS-B BBC %Be low m g/l %Ab ove m g /L M YA-C DPS WM S M YA-E

15 M YA K K A R IV ER W A T ER S H ED - D IS S O L V ED O X YG EN M A X./M IN./M ED IA N Dissolved Oxygen (mg/l) M YA CLG HW C M YA -B BG S -A M YA -F BG S -B BBC M YA -C DP S WM S M YA -E

16 MYAKKA RIVER WATERSHED - DISSOLVED OXYGEN Percent Below and Above.0 mg/l 4% 90% 3% 80% 38% 46% 0% 4% 70% 62% 2% 6% 4% 68% 72% 60% 0% 96% 40% 6% 30% 62% 4% 0% 46% % 38% 48% 44% 46% 32% 28% 10% 0% M YA CLG HWC M YA-B BGS-A M YA-F BGS-B BBC %Be low m g/l %Ab ove m g /L M YA-C DPS WM S M YA-E

17 M YA K K A R IV ER W A T ER S H ED - B O D M A X./M IN./M ED IA N Biochemical Oxygen Demand (mg/l) M YA CLG HW C M Y A -B BG S -A M YA -F BG S -B BBC M Y A -C DP S WM S M Y A -E

18 MYAKKA RIVER WATERSHED - BOD Percent below 2 mg/l 8% 8% 4% 8% 90% 8% 12% 8% 8% 4% 23% 27% 80% 70% 60% 0% 92% 92% 96% 92% 40% 92% 88% 92% 92% 96% 77% 73% 30% % 10% 0% M YA CLG HWC M YA-B BGS-A M YA-F BGS-B BBC % Be low 2 m g/l % Ab o ve 2 m g/l M YA-C DPS WM S M YA-E

19 M YA K K A R IV ER W A T ER S H ED - C H L O R O P H YL L M A X./M IN./M ED IA N Chlorophyll a (micrograms/l) M YA CLG H W 0C M YA -B BG S -A M Y A -F BG S -B BBC M YA -C DP S WM S M Y A -E

20 MYAKKA RIVER W ATERSHED - CHLOROPHYLL Percent Above and Below Standard 4% 4% 0% 4% 16% % 90% 37% 80% 4% 70% 64% 64% 76% 60% 0% 64% 96% 96% 96% 84% 80% 40% 63% 30% 46% % 36% 36% 36% BBC M YA-C 24% 10% 0% M YA CLG HWC M YA-B BGS-A M YA-F BGS-B %Be lo w m g/m 3 %Ab ove m g /m 3 % Be lo w 11 m g /m 3 %Ab o ve 11 m g/m 3 DPS WM S M YA-E

21 M YA K K A R IV ER W A T ER S H ED - T O T A L N IT R O G EN M A X./M IN./M ED IA N Total Nitrogen (mg/l) HW C M Y A -B BG S -A M Y A -F CLG M YA BG S -B BBC M YA -C DP S WMS M Y A -E

22 MYAKKA RIVER W ATERSHED - TOTAL NITROGEN Percent Below /Above 0th Percentile of Florida Streams 90% 4% 19% 27% 31% 80% 0% 0% 27% 38% 46% 70% 42% 6% 60% 0% 40% 96% 81% 73% 69% 30% 0% 0% 73% 62% 4% % 8% 3% 10% 0% M YA CLG HWC M YA-B BGS-A M YA-F BGS-B BBC %Be lo w 1.2 m g/l %Ab ove 1.2 m g/l M YA-C DPS WM S M YA-E

23 M YA K K A R IV ER W A T ER S H ED - T O T A L P H O S P H O R U S M A X. M I N. M E D IA N Total Phosphorus (mg/l) M YA CLG HW C M Y A -B BG S -A M YA -F BG S -B BBC M YA -C DP S WM S M Y A -E

24 MYAKKA RIVER WATERSHED - TOTAL PHOSPHORUS Percent Below /Above 70th Percentile of Florida Streams 17% 90% 80% 46% 70% 69% 60% 77% 8% 96% 0% 92% 88% 81% 8% 83% 40% 30% 4% % 31% 10% 23% 1% 8% 4% 0% M YA CLG HWC M YA-B BGS-A 12% M YA-F BGS-B 19% BBC %be lo w 0. m g/l %Ab ove 0. m g/l 1% M YA-C DPS WM S M YA-E

25

26

27 M Y A K K A R I V E R W A T E R S H E D -p H M A X./M IN./M ED ph M YA CLG HW C M Y A -B BG S -A M YA -F BG S -B BBC M Y A -C DP S WMS M Y A -E

28 MYAKKA RIVER WATERSHED - ph Percent Within Standard Range 4% 4% 8% 90% 3% 80% 70% 60% 0% 96% 96% 92% 40% 6% 30% % 10% 0% M YA CLG HWC M YA-B BGS-A M YA-F % Within Ran ge BGS-B % Ou t o f Rang e BBC M YA-C DPS WM S M YA-E

29 Summary The data supports the delisting of WBID 1981B for Iron. Fecal coliform median values are typically below the FDEP threshold of 400 col/100ml. Most sites show significant response to rainfall. The watershed is primarily agricultural (cropland, pastureland, citrus, sod, wetlands, low-density residential). The source is likely wildlife and livestock. DO values vary widely. They do drop below.0 mg/l in WBID 1981B and throughout watershed. But, historical data (CHEC 1999) indicate that background DO concentrations throughout the basin generally fall below mg/l due to geomorphology, hydrology, and natural processes and are probably not a result of anthropogenic impacts.

30 Summary Cont d BOD values are consistently below 2.0 mg/l Chl a values in river channel consistently above WQ standards. TN values consistent with 0% of FL streams. TP values consistent with 70% of FL streams. They could be related to natural soil phosphate content. ph consistently within acceptable ranges Monitoring data is valuable in supporting protection of the river Additional years of sampling required to establish any trends or seasonal variations

31 Thank You!