assessing riparian condition on the ... - my water quality
TRANSCRIPT
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CWMW Meeting
November 21, 2016
ASSESSING RIPARIAN CONDITION ON THE CENTRAL COAST
1
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Create a “Map” of riparian resources on the Central Coast
Develop a riparian condition assessment tool for areas with various levels of access
Support development of a monitoring/assessment strategy to report on current condition of RB3 riparian resources
Support State/regional wetland/riparian protection efforts
GOALS OF PROJECT
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Create a “Map” of riparian resources on the Central Coast
Develop a riparian condition assessment tool for areas with various levels of access
Support development of a monitoring/assessment strategy to report on current condition of RB3 riparian resources
Support State/regional wetland/riparian protection efforts
GOALS OF PROJECT
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RA
PID
RIP
AR
IAN
A
SSES
SMEN
T M
ETH
OD
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Define levels of access (direct, bridge/road)
Evaluate available assessment tools
Select a set of appropriate assessment tools
Test efficacy of tools for different access
Develop new RAM based on tested metrics
Compare new RAM to CCAMP data at sites in RB3
PROCESS TO DEVELOP A RIPARIAN CONDITION ASSESSMENT TOOL
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Rapid
Strong focus on Riparian, not streams or wetlands
Reproducible
Address as many functions as possible
REQUIREMENTS OF SELECTED METHODS TO TEST
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Index of Riparian Quality (QBR)-Spain
O-QBR (Ohio version)
Rapid Appraisal of Riparian Condition (RARC)-Australia
Riparian Quality Index (RQI)-Spain
Rapid Stream-Riparian Assessment (RSRA)-Arizona
Visual Assessment of Riparian Health (VARH)-California
PLUS CRAM!
FINAL LIST OF TESTED METHODS
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RIPRAM DEVELOPMENT SITES
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Combination of:
O-QBR: Total Riparian Cover, Cover Structure, Cover Quality
RQI: Age Diversity and Regeneration of Woody Species, Dimension of Land with Riparian Vegetation, Substratum and Vertical Connectivity (infiltration capacity)
*VARH: Macroinvertebrate Habitat, Fish Habitat *these are in-channel metrics and may be removed in the final version of RRAM
NEW RIPARIAN RAM METRICS (8)
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RRAM V.1
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RIPRAM VERIFICATION SITES
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RRAM V.1.3
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WAT
ERSH
ED
ASS
ESSM
ENTS
USI
NG
R
IPR
AM
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A partnership with Santa Cruz County to look at riparian condition in streams with salmonids
20 bridge crossing sites were selected from each watershed based on accessibility
In the event that a particular site could not be assessed, due to either access issues or incompatibility with our protocol, the nearest accessible site was chosen as a replacement
SITE SELECTION
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When conditions permitted assessments were performed within the stream across the entire reach of the AA.
In instances where conditions did not allow access to the stream (i.e. high flows, poison oak thickets/ thick vegetation, private property etc.) the assessments were done from the original stream crossing and surrounding vantage points.
Sites took between 30-60 minutes to assess meaning an entire watershed could be completed, including data entry, in roughly one week.
SITE ASSESSMENTS
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An effort was made to determine how far the RipRAM score for a particular assessment area continued upstream.
Differences in land use, hydrologic regime or density of invasive plant species were used to establish break points in the score projection
If no roadway was available, locations of score change were estimated using Google Earth and ArcGIS.
These score projection points allowed us to create maps characterizing the riparian quality for a large portion of the four watersheds.
SCORE PROJECTION
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SMALL WATERSHEDS
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LARGER WATERSHEDS
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A) Soquel creek mouth, index score of 24. B) An unnamed creek in Carmel, index score of 15. C) Branciforte creek, index score of 98. D) An unnamed creek in Corralitos, index score of 93.
EXAMPLE SITES AND RIPRAM SCORES
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REM
OTE
RIP
AR
IAN
A
SSES
SMEN
T
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GIS-BASED TREE MAPPING
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MORRO BAY TREE COVER
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RIPARIAN EXTENT IN MORRO BAY
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LAND USE STRESS AND TREE COVER
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REMOTE ASSESSMENT
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STREAM CROSSINGS
Selected 24 public stream crossings sites representing a range of scores from the Remote Assessment (tree cover and landuse stress)
Assessed each site using RipRAM
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Buffer distance based on:
30m
70m
10x Strahler stream order
RipZET Veg and Slope output
PERCENT TREE COVER AT DIFFERENT BUFFER DISTANCES
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PERCENT TREE COVER AT DIFFERENT BUFFER DISTANCES
y = 1.0512x + 39.633 R² = 0.3958
0
20
40
60
80
100
120
0 10 20 30 40 50 60
% T
ree
Cove
r
RipRAM Index Score
Index Score Vs strahler
y = 0.8922x + 42.341 R² = 0.4185
0
20
40
60
80
100
120
0 20 40 60 80
% T
ree
Cove
r
RipRAM Index Score
Index Score vs RipZet
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PERCENT TREE COVER AT DIFFERENT BUFFER DISTANCES
y = 1.3895x + 36.349 R² = 0.6483
0
20
40
60
80
100
120
0 10 20 30 40 50 60
% T
ree
Cove
r
RipRAM Index Score
Index Score vs 30m
y = 0.7356x + 52.976 R² = 0.2316
0
20
40
60
80
100
120
0 20 40 60 80
% T
ree
Cove
r
RipRAM Index Score
Index Score vs 70m
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PERCENT TREE COVER AT DIFFERENT BUFFER DISTANCES
y = 1.3895x + 36.349 R² = 0.6483
0
20
40
60
80
100
120
0 10 20 30 40 50 60
% T
ree
Cove
r
RipRAM Index Score
Index Score vs 30m
y = 0.7356x + 52.976 R² = 0.2316
0
20
40
60
80
100
120
0 20 40 60 80
% T
ree
Cove
r
RipRAM Index Score
Index Score vs 70m
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SUP
PO
RT
MO
NIT
OR
ING
O
F R
IPA
RIA
N
CON
DIT
ION
BY
RB
3
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RIPARIAN HEALTH IN RB3
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Refine the remote riparian assessment method with additional work in reference watersheds
Validate RipRAM throughout the state
Complete additional watershed assessments in partnership with other Regional Boards and Counties
NEXT STEPS