Online Forum for CFA-2021-0069
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|RFx Number Status & Type||Details||Date|
Request for Tender
Issued by: Country Fire Authority Victoria
UNSPSC: 81000000 - Engineering and Research and Technology Based Services
Wed, 23 June 2021 3:45 PM
Wed, 21 July 2021 2:00 PM
Buyer Post #5 - New Document Available for Download This post is publicly visible
Please be advised the following document has been uploaded and is now available for download.
Clark et al, 2021 -IJWF - Downscaled GCM Climate Projections of Fire Weather over Victoria Part 2
Posted on 14/07/2021 14:11 by Country Fire Authority Victoria
Buyer Post #3 - Further Questions and Answers This post is publicly visible
Does the project require us to impose burning scenarios externally (i.e. via forcing data), or are we OK to use model-simulated fire scenarios that is a built-in feature of the model?
The project does not require the simulation or modelling of fire. Much of the vegetation in the study area is fire dependent, and will persist if burnt at a frequency within its Tolerable Fire Interval (TFI). We would like the project to 1) produce scenarios where it assumed that all fuel/vegetation classes remain within TFIs (i.e. fire is not a primary driver of change), and 2) scenarios where sensitive vegetation classes are identified (i.e. those where increased fire is likely to result in marked structural change such as the loss of the overstorey species) and modelled as if species replacement had occurred. The aim of this project is to develop baseline datasets that can be used for evaluating possible future fire scenarios.
Is there a list of species/community of concern that the agency is interested in to identify climate thresholds?
Fuel classes used by management for areas of natural vegetation are derived from Ecological Vegetation Class (EVC) groups and subgroups. EVC data are available from www.data.vic.gov.au . An indication of general groupings and TFIs of the natural fuels can be found in https://www.ffm.vic.gov.au/__data/assets/pdf_file/0008/21113/Report-84-REDUCED-SIZE-Growth-Stages-and-Tolerable-Fire-Intervals-For-Victorias-Native-Vegetation-Data-Se.pdf . A table to translate EVC to fuel classes will made available to the successful bidder. The State’s fuel map also includes additional human modified fuel classes (e.g. crops, plantations).
Posted on 13/07/2021 13:28 by Country Fire Authority Victoria
Buyer Post #1 - Questions, answers and clarifications This post is publicly visible
Questions, answers and clarifications
What kind of output are you expecting?
Our aim is to have fuel maps that are equivalent to those used for risk mapping for the State of Victoria. The State’s fuel maps consist a high-resolution raster where each pixel is classified into one of 42 alternative classes. We expect the final products to be based on this fuel classification system.
What data do you expect to be used in this process?
For areas of the state with native vegetation cover, fuel classes are derived from Ecological Vegetation Class (EVC) Groupings. This data and summary groupings will be made available to the successful bidder. It is expected that modelling will focus on how the EVC groupings will change with time.
Non-native vegetation cover is derived from maps of land use. It is not expected that the modelling of land-use models will be a focus of this project, however the use of any available existing forecasts of land use change would be considered a value-add.
Information about the tolerable fire intervals of species and communities will be made available to the successful bidder to allow communities likely to be vulnerable to frequent fire to be identified.
Climate data will be provided to the successful bidder that represents climate change scenarios progressively projected from today to 2100. The dataset is described in https://www.publish.csiro.au/WF/WF20175
Do you require an ecosystem process model?
We do not require that ecosystem processes model; empirical models may be suitable. We do require that transitions of fuel types have a defensible degree of realism; e.g. that fragmentation and natural barriers may prevent range shifting of communities.
Do you require that all species be accounted for?
Our aim is to produce fuel maps that are comparable to those currently used for risk planning in Victoria. These do not require consideration of all species; but do recognise species related structural patterns – e.g. forest with shrub, heathy woodland. An approach to consider these general species groups would be necessary. In addition, species that define particular fuel classes may need to be considered separately – e.g. recognising the importance and fire sensitivity of Ash Eucalypts in ‘Wet forest’ fuel classes.
What about situations where expected vegetation transitions do not match existing fuel types?
There is the potential that modelling produces vegetation configurations that do not align with the current fuel classification. These should be resolved through consultation with CFA, and clearly delineated within outputs.
Posted on 12/07/2021 13:53 by Country Fire Authority Victoria