shoreline video assessment (s -vam)
TRANSCRIPT
MangroveWatch Shoreline Video Assessment (S-VAM)
Jock Mackenzie & Norm Duke CoDirector – MangroveWatch Ltd. Mangrove Hub Coordinator - JCU www.mangrovewatch.org.au [email protected]
MangroveWatch Shoreline Video Assessment (S-VAM)
Part 1: Introduction to S-VAM How S-VAM fits into MangroveWatch How to S-VAM Part 2: Data Analysis with S-VAM Brief Introduction to Data Analysis Science & Management Outcomes Part 3: Case Study – Kien Giang Shoreline Assessment
A Mangrove Monitoring Strategy that is
Community driven, Scientifically validated
With Practical outcomes for management
What is MangroveWatch?
Assessing Change Identifying Threats
Empowering Communities
Enhancing scientific knowledge
Informing management solutions
Protecting tidal wetlands
Protecting coastal resources
Informing communities
Gauging management success
Shoreline Video Assessment Method (SVAM)
Continuous Georeferenced Digital
Video Image Recording &
Criteria Based Image Analysis
MangroveWatch – your 6 step cycle
Step 2: Film shoreline
Step 3: Track position
Step 4: Send video and GPS track to mangrove experts
Step 5: Repeat Steps 1 to 4 - every 6 months
Step 6: Feedback on your mangroves health will be sent
back to you
Step 1: Select area of mangroves or
shoreline to monitor
Training & support from mangrove
experts
Data assessment by mangrove
experts
Data collection by you
How does MangroveWatch & S-VAM work?
Community Education & Training
Community Data Collection
No prior mangrove knowledge required.
2x surveys per year
(wet/dry season)
2x Workshops/ year Training and Feedback
Community
How does MW work?
Imagery (video) analysis
Data processing and Outputs
Data transfer from Community to Scientists
Requirements: Mangrove knowledge
Basic Excel and ArcGIS
Management
Science
When to go MangroveWatching?
Good Tide – low to mid Good Light – Sunny Film with the sun on
your back 2 surveys per year Ends of Dry & Wet
seasons
The 5 Tasks of S-VAM
1. Handycam Operator 2. GPS Operator 3. Photographer 4. Observer 5. Boat Driver
Handycam Operator Before Filming 1. Check the camera
settings - Time - GPS - Record Mode - Quality - Noise
2. Clean the lens 3. Attachments
Handycam Operator
During Filming 1. Keep the camera stable 2. Watch the shot 3. Maintain distance 4. Keep the lens clean 5. Provide Active
Commentary
GPS Operator
During Filming 1. Check the Track log 2. Keep a clear signal 3. Take waypoints 4. Keep an eye on batteries 5. Watch boat speed *Turn Track Log off when done
Photographer Before Filming 1. Check time & GPS During Filming Just keep clicking! Be creative - there’s prizes to be
won
Observer/ Recorder
1. Record Start/ Stop Locations
2. Waypoints 3. Interesting Features 4. Bird/ Fauna Counts 5. Mangrove User counts 6. Mangrove Phenology
Boat Driver
1. Maintain distance (~50m)
2. Maintain speed (6-10kts) 3. Follow the bends 4. Avoid excessive noise,
vibration, stops and starts
5. Safety First!
Video converted to 1s frame images
Images linked to GPS track and assessed against Multiple criteria – e.g. Mangrove forest type
Data used to generate map outputs With ArcGIS
Science
BANK FEATURES
BANK MORPHOLOGY
SUBSTRATE
PHYSICAL PROCESS
HABITAT
PRESSURES DIRECT INDIRECT
CUTTING
GRAZING RECENT
REMOVAL
HARDENDED BANK
OPEN DRAIN ADJACENT LANDUSE
BUILT STRUCTURES
LITTER
BOATS
VEGETATION FEATURES
MANGROVE
DENSITY
HEIGHT
DOMINANT SP. DIEBACK
Intensity DIEBACK
Scale
FOREST TYPE
FALLEN TREES
TERRESTRIAL
DENSITY
DOMINANT SP.
EXPOSED ROOTS
HEALTH
FALLEN TREES
HEIGHT
EXPOSED ROOTS
SEEDLING DENSITY
ASSESSING ECOSYSTEM VALUE & CONDITION & Identifying threats & drivers of change
What do we look for? Science
2011
2009
2011
Assessing Resilience to Natural Events Drought Recovery Flood Damage
Feb 2011
Aug 2011
Outcomes Science
1977
2004
Habitat Mapping – Nutrient Effects MangroveWatch Tracks
Using MangroveWatch footage & assessment for ground-truthing
habitat mapping
Outcomes Science
Biomass Assessment Outcomes Science
Groundtruthing Plots Video Assessment +
Biomass (AGB) = 0.168pD^2.47 (Chave et. al. 2005)* No. of Stems
p = Wood Density
D = Stem Diameter = 3.4519*exp(0.0922*Height)
(R2=0.82)
# Stems = 1.1004*exp(0.0133*Height) (R2=0.78)
Use plots to develop local equations
‘ShoreView’
Interactive, online mangrove condition report cards
Prototype innovation
Outcomes Management
Advantages of the MW approach Community Engagement: • Records local knowledge and locally relevant
issues – anecdotal evidence, historical images, stories
• Enables large spatial coverage • Community education • Community environmental stewardship And many more…
Advantages of the MW methods Video Monitoring: • Easy use. • No objective decision making required in the field • Rapid: 1 hour = ~12km. • Permanent Visual Record • Remote data assessment by mangrove scientists • Potential for further ‘expert’ assessment – bird habitat etc. • Perfect for data visualisation
Lessons Learned so far…. Feedback is essential!
• Requires assessment of footage. • Guaging community knowledge increase
Every region and group is different…
• Level of capacity – different skill sets • What’s considered important – why are you
MangroveWatching? • Local issues vary
The MangroveWatch program is flexible and adaptive
The primary goal is imagery collection for long-term monitoring, everything else is locality dependent
Discussion Session
How can MangroveWatch help you? – What
information would you like to have about shoreline habitats?