Noosa River Mangrove watch
Field Data Collection: Video Recording
Maps and data will be prepared from raw data collected by NICA community volunteers.
Community volunteers video the shoreline from a boat running parallel to the coastline approximately 25 m from the shore using a Sony Handycam. A GPS will be used to record latitude and longitude every 3 seconds. Both the GPS and Handycam are set to the exact same time. Aerial view of the inland Noosa River system.
During videoing, volunteers will be required to make voice notes on their personal observations, such as bird life and anecdotal stories relevant to the estuary or coastline. Field notes, including start times, weather conditions and tides were recorded in an observer diary. The digital still camera was used to record action shots and establish photo-point monitoring sites for future reference. Upon completion, the video, GPS track, still photos and observer diaries are sent to the MangroveWatch Hub for analysis.
At the Hub, videos are analysed by post-graduate student volunteers. Each video was assessed as a continuous point intercept transect of the shoreline. Video of the shoreline is reduced to 1 second frame .jpg image files. The time of the video and GPS is used to match each frame to a specific GPS location. Each frame that matches a GPS position is used as a point along the transect. Specific environmental health features are recorded for each image point.
Criteria for Assessment
The SVAM is used to assess the following parameters;
- Habitat Features
- Shoreline Habitat Type.
- Mangrove Vegetation height and density.
- Mangrove Dominant Species.
- Mangrove Condition – Dieback extent and frequency.
- Fallen Tree frequency.
- Physical Damage (Natural and Human related)
- Physical Features
- Bank Substrate
- Bank Condition
- Bank Slope
- Walls and Hardened banks
- Built Structures.
Data collected from the video analysis is used to generate a condition score for the Noosa River estuary and shoreline. The condition score grades the overall bank habitat condition of the shoreline and relates to vegetation biomass, vegetation condition, bank erosion, slope and bank modification. Bank habitat condition is graded as Excellent, Very Good, Good, Requiring Improvement, Poor and Very Poor. Condition Scores are mapped using ArcGIS 9.3 and will be presented as a publically available estuary report card – See Burnett River exemplar Report Card.