The IFS model connects land use types (including urban) with loadings of sediment and nutrients to the river. Aquatic habitat and values such as mauri are also included. In addition, ecosystem services are derived from land use and land cover. Various management options (solutions) are incorporated into the model, such as just fencing off waterways, riparian planting of waterways, use of herd homes, reforestation of steeper hill country and restoration of wetlands.
The IFS model is a scoping model constructed from a Mediated Modelling process which extended over 3 workshop days with 16-18 participants from Horizons Regional Council, Fonterra, Federated Farmers, Fish and Game, Forest and Bird, Department of Conservation, Horowhenua District Council Tarenuiarangi Manawatu Incorporated, Palmerston North City Council, Water & Environmental Care Assn Inc and Manawatu Estuary Trust, Te Kauru (Eastern Hapu Collective Rangitane), Muaupoko Tribal Authority, Te Kauwhata and Vision Manawatu. The model is a high level attempt to scope for trends and inter-linkages between sediment and nutrient loading, degraded water quality and aquatic habitat issues. The solutions volunteered by the participants are incorporated in the model to envision whether (1) the amount of funding required and from where would be sourced, and (2) what potential improvements could be anticipated from proposed actions. The model doesn’t ‘predict’. Instead, it is a way to develop leading questions to establish what we know and what knowledge needs to be pursued. The first iteration of the IFS model indicates that the actions developed under the MRFL action planning process are unlikely to curb current broad trends to meet the goals set out by the MRLF Accord. The benefits gained from actions undertaken are likely to be less that the deterioration resulting from higher stocking and population numbers. More fundamental solutions are required to convincingly show how future trends, especially regarding nutrient runoff, are to be curbed. It is envisioned that the IFS model will be updated if/when the participants are ready to discuss solutions from a shifted perspective. The IFS model would then be used as a collaborative, adaptive management tool.
| Latest Version | Not versioned |
|---|---|
| State of Development | Alpha |
| Current Development Activity | Update envisioned in 2013 |
| Outcome Areas | Economic, Environmental, Social, Cultural |
|---|---|
| Management Domains | Land, Freshwater |
| Subdomains | Contaminant Losses, Water Yield, Erosion/Sediment, Ecosystem/Habitat, Crop/Farm Systems |
| Intended End Users |
|
| Temporal Resolutions | Years |
| Temporal Extents | Decades |
| Steady State or Dynamic | Dynamic |
| Level of Integration | Economic, Environmental, Social, Cultural |
| Key Input Data | Macro-economic data, Land Use, Land Cover, Rainfall, Runoff, Population cohorts, Migration, Fertility, Cultural |
|---|---|
| Input Data Formats | Stella-file format |
| Key Output Data | Macro-economic data, Runoff, Cultural Ecosystem services |
| Output Data Formats | Stella-file format |
| Open/Closed Source | Open Source |
|---|---|
| Licence Type | No Licence |
| Licence Cost (Non Commercial) |
$ |
| Licence Cost (Commercial) |
$ |
| Operating Systems | MS Windows |
|---|---|
| Software Needed | Stella/Ithink |
| User Interface | Graphical desktop |
| Ease of Use | Easy A user-friendly interface allows you to change papameter values through sliders and switches. |
| Use in Policy Process | Plan (Policy Formulation), Review (Issue Identification) |
| Documentation | Planned to be released by June 2012 |
| Support | Marjan van den Belt |
| Users Forum | Not Available |
| Methods included for calibration and validation | The model was calibrated to fit historical data trends. |
|---|---|
| Methods included for managing uncertainty | this model does not deal with uncertainty. |
| Analytical Techniques | Mediated Modeling |
| Keywords | Manawatu, catchment, Nitrogen, phosphorus, Sediment, Runoff, Flood protection, Natural Capital, Maori values and Mana |
| Linkages to other Models | |
| Key References | Forthcoming |
The IFS model is a scoping model constructed from a Mediated Modelling (MM) process which extended over 3 workshop days with 16-18 participants from Horizons Regional Council, Fonterra, Federated Farmers, Fish and Game, Forest and Bird, Department of Conservation, Horowhenua District Council Tarenuiarangi Manawatu Incorporated, Palmerston North City Council, Water & Environmental Care Assn Inc and Manawatu Estuary Trust, Te Kauru (Eastern Hapu Collective Rangitane), Muaupoko Tribal Authority, Te Kauwhata and Vision Manawatu.
Read morePohangina case study is a down-scaled version of the regional IFS model.
