Guy’s presentation – InVEST 3.0
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InVEST 3.0 – no fixed deadline – hopefully Q4 of 2012
Will be major milestone for NatCap
Improvements in existing and new models
Rewrite manual – User guide and scientific manual
Does not require ArcGIS – own user interface, also a GIS toolbox
Output standardization and uncertainty analysis
New models: agricultural production, flood risk mitigation, Tier 0 ranking model for NTFP,
aesthetic quality, recreation, fisheries, carbon storage (marine), monthly water yield model
Coding – expect to see new model/improvements within a few months
Scoping – on our plate, something will definitely happen this year
Planned – have good ideas how to do but not enough resources so might nhot happen during
2012.
Priorities depending on funding resources capacity and need from InVEST
New improvements
o Water yield – adding simple irrigation model (planned0
o Sediment retention (coding)
 New flow algorithm
 Impvoed USLE form
 Replacing retention by a scale independent and slop-dependent Sediment
Delivery
o Carbon model (planned)
 Adding exponential dynamics per LULC class and carbon pool
 Add intermediate map clearing before plantations
 Input carbon stocks from timber model and agricultural production model
o Timber model
 Coupling rotation period and harvested mass using simple tree growth model
Tools in the workds
o Standard output (scoping)
o Uncertainty
Using monthly water yield model one can apply model and check how dams, LUC change and
climate change will affect floodplains fisheries.
The updated sediment model can be useful to look at changes in sedimentation patterns and
total sediment reaching Vietnamese Delta and off-shore fisheries
Questions from audience
o Landslides
o Fisheries – freshwater
 Population dynamics model for marine fisheries, by species – exists now
 Needs a different modeling approach for rivers and tributaries, could look into
this
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Impacts of dams on migrations through loss of connectivity (productivity).
Model will be usable with InVEST once have monthly water yield model
Flood risk mitigation and sediment retention don’t address issues of sediment
deposition
 Sediment retention model is annual, don’t have bank deposition or retention
 So for retaining delta areas, don’t have the model for that – rate of soil
deposition in delta area
 Could combine flood model (tells you flooded area) with monthly outputs from
sediment retention for deposition of soil on land. Haven’t thought it through
carefully.
Linkages
 Want to add links to freshwater and terrestrial models
 Lots of terrestrial models use LULC as common input, not an equivalent in
marine.
 Arrows in marine reflect fact that have to turn outputs into inputs for models.
 For terrestrial = many common inputs that come from LULC.
 Managed timber and ag, inputs to carbon model
 Link crop pollination to agricultural production
 Link water yield to sediment retention model
 All planned, but not all in the works