The Catchment Contaminant Annual Loads Model (C-CALM) is a GIS-based contaminant load model which operates at the sub-catchment scale. Contaminants modelled are total suspended solids (TSS) and particulate and dissolved zinc and copper. C-CALM consists of a modelling interface backed by a query library of performance rules for a range of stormwater treatment options commonly found in NZ. C-CALM is supplied as a tool-bar for ArcMap. Users are asked to supply the spatial data needed to run the model; the minimum data required are sub-catchment boundaries and a breakdown of land covers found in each sub-catchment. Users are then able to add treatment options to each sub-catchment; each treatment option is customised for catchment and device characteristics, and the contaminant sources, by filling in a treatment option window. Treatment options are aggregated, that is, rather than simulating every element in the drainage system, similar treatment devices are modelled as a single device with the same removal efficiency as the individual devices. Rudimentary treatment trains can be simulated by C-CALM with the caveat that C-CALM does not simulate surface flows or device hydraulics, so that the effects of storage and attenuation on treatment are not taken into account. Running the model generates a set of display map layers and a summary table which gives the annual load for each contaminant listed by sub-catchment.
The model was developed by NIWA under sub-contract to Landcare Research as part of the FoRST funded Low Impact Urban Design and Development programme. C-CALM is intended to aid in the planning of stormwater treatment systems and has been developed to be easy to use with minimal set-up and run times and modest data requirements.
| State of Development | Open Beta |
|---|---|
| Current Development Activity | No current funding for support or development. Available for download on request from NIWA (annette.davies@niwa.co.nz) |
| Outcome Areas | Environmental |
|---|---|
| Management Domains | Land, Urban Systems |
| Subdomains | Contaminant Losses, Storm Water |
| Intended End Users |
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| Spatial Resolutions | Unknown |
| Spatial Extents | Local (i.e. Catchment or District) |
| Spatial Dimensions | Unknown, 2D |
| Temporal Resolutions | Years |
| Temporal Extents | Years |
| Steady State or Dynamic | Steady State |
| Level of Integration | Environmental |
| Key Input Data | Land Use, Land Cover Stormwater treatment |
|---|---|
| Input Data Formats | XLS(X), GIS compatible files |
| Key Output Data | Annual loads of TSS, zinc and copper |
| Output Data Formats | GIS Compatible Files Tables which can exported into Excel |
| Open/Closed Source | Closed Source |
|---|---|
| Licence Cost (Commercial) |
Unknown |
| Licence Purchase Contact |
Annette Semadeni-Davies
annette.davies@niwa.co.nz |
| Operating Systems | MS Windows |
|---|---|
| Software Needed | ArcGIS, Excel |
| User Interface | Graphical desktop |
| Ease of Use | Easy Designed for simple set up and use. |
| Use in Policy Process | Plan (Policy Formulation) |
| Documentation | Semadeni-Davies, A. and Altenberger, A. (2009) Catchment Contaminant Annual Loads Model (C-CALM): User Manual. Manuscript prepared for Landcare Research Ltd. NIWA client report: AKL-2009-060 |
| Support | No current funding for support or development |
| Analytical Techniques | GIS, Scenario Planning |
|---|---|
| Keywords | stormwater, contaminants, sediment |
| Linkages to other Models |
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| Key References | CONFERENCES: Moores, J., and Semadeni-Davies, A. (2011) Integrating a stormwater contaminant load model into a spatial decision support system for urban planning. International Conference of the IWA Diffuse Pollution Specialist Group on: Diffuse Pollution and Eutrophication, 18-23 September 2011, Rotorua, New Zealand. Semadeni-Davies, A., Moores, J. and Altenberger, A. (2010) C-CALM development and application of a planning tool for stormwater management in New Zealand. 17th Congress of the Asia and Pacific Division of the International Association of Hydraulic Engineering and Research incorporating the 7th International Urban Watershed Management Conference, 22-24 February, 2010, Auckland, New Zealand. Semadeni-Davies, A., Altenberger, A. and Wadhwa, S. (2009) C CALM – Catchment Contaminant Annual Loads Model. NZWWA 6th South Pacific Stormwater Conference, May 2009, Auckland Semadeni-Davies, A., Elliott, A.H., Reed, J. (2008) C-CALM: a Catchment Contaminant Annual Loads Model for New Zealand. Presented at 11th International Conference on Urban Drainage, Edinburgh, Scotland. |
Vesely E.-T., Semadeni-Davies, A. and Simcock, R. (2009) Waiarohia catchment stormwater treatment modelling with C_CALM and COSTnz. Landcare Research Contract Report prepared for: Waitakere City Council.
Semadeni-Davies, A. (2009) Simulation of annual contaminant loads from three stormwater catchments to Whangarei Harbour. Report prepared for Northland Regional Council. NIWA client report:AKL2009-064
