overview of water quality in copano bay watershed
DESCRIPTION
Overview of Water Quality in Copano Bay Watershed. Kevin Wagner, PhD Texas Water Resources Institute. Set Goals and Water Quality Standards (WQS). Conduct Monitoring. Meeting WQS?. 303(d). No. Yes. Apply Antidegradation. - PowerPoint PPT PresentationTRANSCRIPT
Overview of Water Quality in Copano
Bay WatershedKevin Wagner, PhD
Texas Water Resources Institute
Set Goals and Water Quality Standards (WQS)
Conduct Monitoring
Meeting WQS? Yes
Apply Antidegradati
on
No303(d)
Develop Strategies and Control (TMDL,
WPP, Evaluate Standards)
Implement Strategies
Overview of Water Quality Management
Water Body Uses Protected in Texas
• Recreation• Domestic Water Supply• Aquatic Life• Fish Consumption• General Use• Oyster Harvesting
Water Quality Assessment Results
• Mission River Tidalo Aquatic Life Use = No concern / fully supportingo General Use = No concern / fully supportingo Recreation Use = Not supporting (bacteria levels exceed state
standards)• Mission River above Tidal
o Aquatic Life, Recreation & General Use = No concern / fully supporting• Aransas River Tidal
o Aquatic Life Use = No concern / fully supportingo General Use = Currently supporting but nutrient concern (PO4)o Recreation Use = Not supporting (bacteria levels exceed state
standards)• Aransas River above Tidal
o Aquatic Life Use = Currently supporting but dissolved oxygen concerno General Use = Currently supporting but nutrient concern (PO4, NO3, TP)o Recreation Use = No concern / fully supporting
Water Quality Assessment Results,
continued• Aransas Creek
o Aquatic Life Use = Currently supporting, but dissolved oxygen concerno Recreation Use = Not supporting (bacteria levels exceed state
standards)• Copano Bay
o Aquatic Life Use = No concern / fully supportingo General Use = No concern / fully supportingo Recreation Use = Fully supportingo Oyster Harvest = Fully supporting
• Mission Bay/Aransas River Arm, Port Bay & Eastern shorelineo Oyster Harvest = Not supporting (bacteria levels exceed state
standards)
Monitoring Procedures
• Surface Water Quality Monitoring Procedures to be followed if data is used for assessment
• http://www.tceq.texas.gov/publications/rg/rg-415/index.htmlo Chapter 2 – General Monitoring Guidelineso Chapter 4 – Collecting and Analyzing Bacteriological Sampleso Chapter 5 – Collecting Water Sampleso Chapter 9 – Required Equipment and Spare Partso Chapter 10 – Quality Assurance and Quality Control
Map of Monitoring Sites
Station 12943 - Mission River at FM 2678 (Tidal
Stream)Station Parameter N Min Max N > Std % > Std Median Geomean12943 Entero 28 8 4600 19 68% 72 68
Apr-01Sep-02
Jan-04May-05
Oct-06Feb-08
Jul-09
0
100
200
300
400
500
600
700
800
900
1000
12943 - Enterococcus (GM 68)
cfu/
100m
L
Station 12947/8 - Aransas River Tidal at US 77 (Tidal
Stream)
Station Parameter N Min Max N > Std % > Std Median Geomean129478 Entero 28 1 3400 16 57% 49.5 66
Aug-04Feb-05
Sep-05Mar-06
Oct-06Apr-07
Nov-07Jun-08
Dec-08Jul-09
0
100
200
300
400
500
600
700
800
900
1000
12947/12948 - Enterococcus (GM 66)
cfu/
100m
L
Station 12945 - Copano Bay at FM 136
Station Parameter N Min Max N > Std % > Std Median12945 Fecal 18 1 400 13 72 23
Jul-98Dec-99
Apr-01Sep-02
Jan-04May-05
Oct-06Feb-08
Jul-09
0
50
100
150
200
250
300
350
400
12945 - Fecal Coliform (Median 23)
cfu/
100m
L
Questions?Kevin Wagner, PhDTexas Water Resources [email protected]
Allen BertholdTexas Water Resources [email protected]