trinity river land and water summit: overview of watersheds, water quality impairments, and planning...
TRANSCRIPT
Overview of watersheds, impairments, and planning efforts
WQS are the water quality criteria to protect designated uses of a water segment
Designated Uses◦ Recreation
◦ Aquatic Life Use
◦ Public Water Supply
◦ General
Impaired◦ Doesn’t meet criteria for designated uses according
to water quality standards by TCEQ
◦ Placed on 303(d) list and action must be taken within 13 years from listing (TMDL, WPP)
Regulatory
Focuses only on pollutant(s) causing impairment
Water body always on 303(d) list
Voluntary, community-driven
Holistic – focuses on all potential pollutant sources in watershed
Water body usually (not always) on 303(d) list
Watershed Protection Strategies
1. Yes
2. No
3. Need more info
YesNo
Need more
info
71%
25%
4%
1. Yes
2. No
3. Not sure
YesNo
Not sure
72%
24%
4%
1. Yes
2. No
YesNo
2%
98%
BMPS
Pesticides
Pasture
wildlife
Are there additional natural resource concerns for this watershed?
Hogs
Illegal dumping
Do you perceive land and/or water resource problems in your watershed?
of BLH
Lignite
Loss of blh
Pasture
Brush management
Invasives (hogs, etc.)
Easements
1. Yes
2. No
YesNo
12%
88%
“Aquatic Life Use” category
Critical for fish and other aquatic organisms
Measured in milligrams per liter (mg/L)
Influences:◦ Temperature
◦ Season/Time of Day
◦ Stream Flow
◦ Plant Photosynthesis and Shading
Causes:◦ Organic matter decomposition (natural)
◦ Excess nutrients in runoff
◦ Wastewater effluent
DO 24 hour average criteria = 5 mg/L
DO 24 hour minimum criteria = 3 mg/L
Credit: Univ. of Florida
Method to set standards appropriate for each waterbody
Structured scientific assessment of the factors affecting the attainment of uses which may include physical, chemical, biological and economic factors
May result in change in water quality standards for that waterbody
Involves more intensive water quality sampling and habitat assessment
Potential reasons for lowering a use or criteria:◦ Naturally-occurring substances
◦ Natural flow conditions
◦ Human-caused conditions that cannot be remedied
◦ Hydrologic modifications (dams, intakes, etc.)
◦ Physical conditions of the water body
◦ Substantial economic and social impacts
“Contact Recreation” use category
High levels can cause sickness if ingested
Measured in colonies/100 mL
Sources:◦ Wastewater effluent
◦ Failing septic systems
◦ Feral hogs
◦ Livestock
◦ Wildlife
◦ Natural in the system
126
605
126
630
1030
2060
0
500
1000
1500
2000
2500
Primary
Contact Rec
Noncontact
Rec
Primary
Contact Rec
Secondary
Contact 1
Secondary
Contact 2
Noncontact
Rec
Geom
etr
ic M
ean
2000 Standards 2010 Standards
UAA to determine correct standards for recreation category
Consists of◦ Field survey to determine usability (adequate depth,
flow, access)
◦ Evidence of recreation use
◦ Survey of landowners and others of past recreation use
May change standards and raise allowable bacteria levels
Cropland (< 1%)
Forest (20%)
Developed: High (<1%)
Developed: Low (5%)
Grassland (8%)
Wetlands (21%)
Open Water (2%)
Pasture/Hay (42%)
Catfish Creek Watershed Land Use
1. Enacts regulation
2. Determines correct water quality standards
3. Nothing
4. Bring more recreation to creek
Enacts r
egulatio
n
Determ
ines c
orrect
wat
..
Nothin
g
Bring m
ore re
creat
ion to
...
11%3%
11%
76%
1. Very frequent
2. Frequent
3. Not frequent
4. None or very little
Very fr
equent
Frequent
Not fre
quent
None or v
ery li
ttle
4%
48%
33%
15%
1. Yes
2. No
3. Need more info
YesNo
Need more
info
65%
24%
12%
1. Yes
2. No
3. Not sure
Yes No
Not sure
73%
24%
3%
1. Yes
2. No
3. Need more information
Yes No
Need more
info
rmatio
n
67%
19%14%
1. Very frequent
2. Frequent
3. Not frequent
4. None or very little
Very fr
equent
Frequent
Not fre
quent
None or v
ery li
ttle
0%
42%
58%
0%
1. Yes
2. No
YesNo
13%
88%
1. Yes
2. No
3. Need more info
YesNo
Need more
info
52%
41%
7%
1. Yes
2. No
3. Not sure
YesNo
Not sure
66%
24%
10%
1. Yes
2. No
3. Need more information
Yes No
Need more
info
rmatio
n
15%
62%
23%
1. Very frequent
2. Frequent
3. Not frequent
4. None or very little
Very fr
equent
Frequent
Not fre
quent
None or v
ery li
ttle
14%21%
64%
0%
1. Yes
2. No
3. Need more info
YesNo
Need more
info
74%
26%
0%
1. Yes
2. No
3. Not sure
Yes No
Not sure
70%
26%
4%
1. Yes
2. No
3. Need more information
Yes No
Need more
info
rmatio
n
53%
40%
7%
1. Yes
2. No
YesNo
3%
97%
What are the major natural resource concerns for this watershed beyond WQ impairment?
1. Yes
2. No
YesNo
6%
94%
1. Yes
2. No
3. Already adopted
YesNo
Already a
dopted
85%
15%
0%
1. Very Likely
2. Likely
3. Neutral
4. Not Very Likely
5. Not Likely
Very Li
kely
Likely
Neutral
Not Very
Likely
Not Lik
ely
74%
19%
3%0%
3%