Transcript Document

Data Categories
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Watershed physiographic data
Hydrographic data
Weather data
Watershed activities/use data and information
related to pollutant production
 Point sources and direct discharge data and
information
 Environmental monitoring data
 Stream flow data
Mill Creek Watershed
• Watershed area is 9308 acres
• Dominant Land Use:
– 61 % Improved pasture
– 22% Forest
– 10% Cropland
Targeting
TMDL Implementation
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
Monitoring Results
Spatial Analysis
Modeling
Anthropogenic Contributions
• Pollutant loading(s) from human controlled
sources:
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–
–
–
–
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Permitted Sources
Straight pipes
Septic systems
Land application of wastes
Livestock and pets
Others?
DEQ Bacteria Monitoring
Network
A
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Bacteria Monitoring Stations
Impaired Stream Segment
Impaired Watersheds
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L ew
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Lower Middle River
Polecat Draft
Lewis Creek
Moffett Creek
Upper Middle River
South River
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1BSTH041.68
Fecal Coliform Standard
Violations
70
63%
62%
60
59%
50
43%
40
38%
% Exceed ances
36%
33%
30
26%
24%
20
19%
15%
13%
10
0
Upper M iddle
River
M offett Creek
Lewis Creek
Polecat Draft
Lower M iddle
River
Imp air ment
1998 Assessment
2002 Assessment
South River
Monitoring
• Purpose
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Public perception
Baseline data for implementation
Spatial targeting of pollution control measures
Framework for triggering review of TMDL
• Design
– Fixed-frequency sampling and sample size
– Fecal coliform enumerations and nutrient
concentrations
– Bacterial Source Tracking (BST)
BACTERIA SOURCE TRACKING
(BST)
• Molecular or genotypic
• Biochemical or phenotypic
• Chemical
Holman’s Creek Stream Network
and Monitoring Stations
BST station
DEQ station
Middle River
BST Monitoring Network
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U
C
O
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No
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T
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Ch
ris
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BST Monitoring Stations
Impaired Stream Segment
Impaired Watersheds
Lower Middle River
Polecat Draft
Lewis Creek
Moffett Creek
Upper Middle River
South River
N
Waynesboro
W
E
S
#
uth
So
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South
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cat Draft
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Jennings
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Bacteria Source Tracking
Preliminary Results*
• In all 20 sites livestock appears to be the
most prominent source identified.
• At 7 of these sites wildlife appears to be a
significant contributor.
• In 2 sites human sources appear to to be a
significant contributor.
*These results are undergoing further
evaluation and are subject to change.
Implementation:
Targeting Septic Programs
517
Non-Sewered
Building
300’
895
Buildings
Sewer
Footprints
Buffer
within
Buildings
300’
(1,363
of
Stream
Buildings)
Stream
or
Sinkhole
Implementation:
Monitoring and Modeling to Evaluate Targeting
Strategy (Results of first 2 years)
Modeled
Violations (Nontargeted)
Modeled
Violations
(Targeted)
North Fork
Blackwater R.
74%
29%
Middle BWR
61%
40%
Dry River
54%
31%
Impairment
Percent Fecal Coliform
Reductions in Page Brook
5000
(42,400)
4000
3000
88.8%
2000
Summer 1997
Summer 1998
Summer 1999
96.2%
98.9%
60.3%
63.0%
89.7%
1000
0
PB 10
PB 12
PB 16
3 year overall
average reduction
= 83.9%
Data and Information Needs…
•
•
•
•
Watershed physiographic data
Hydrographic data
Weather data
Watershed activities/use data and information related
to pollutant production
• Point sources and direct discharge data and
information
• Environmental monitoring data – surface and ground
water
• Stream flow data