Access PSS here (scientist user level, free for non-commercial uses, simply create an account, but make a donation if you can)

Access PSS here (superuser, licensed)

Access PSS here (hyperuser, licensed)

Access PSS here (megauser, licensed)

Developers: King's College London (models), AmbioTEK (software), CIAT, SEI, WWF, UNAL (applications)

Audience: Conservation and development NGOs, GO and NGO Policy analysts, agriculture and industry (e.g. extractives), education and academic research.

Associated project(s): CGIAR Challenge Programme on Water and Food AN3 (Mechanisms for benefit sharing to improve productivity and reduce conflicts for water in the Andes)

Focus: CompAndes is a web based tool based on AguAAndes and is developed as a Negotiation Support System (NSS) for negotiations around benefit sharing mechanisms for water. This NSS is a testbed for negotiations around benefit sharing mechanisms for water focusing on sustaining equitable flows of water for all through appropriate land, ecosystem and water management. It is focused on enabling the intended and unintended consequences of benefit sharing mechanisms to be tested in silico before they are tested in vivo . The NSS incorporates detailed spatial datasets at 1-square km and 1 hectare resolution for the entire world, spatial models for biophysical and socioeconomic processes along with scenarios for climate and land use. The NSS calculates a baseline for current water provision and allows a series of interventions (policy options) or scenarios of change to be used to understand their impact on water delivery to people and environment.

Though we provide input data for application of this model anywhere globally (from remote sensing and other global sources) users can also use this model with their own datasets. Application with the provided datasets takes only half an hour and requires no GIS capacity. Bringing in your own datasets will take much longer depending on the availability, level of processing, format and consistency of those datasets and also requires GIS capacity.

Typical applications include: negotiating PES schemes, trading off different water uses, understanding changes in water provision under changed climate or land and water management.

Example applications Training

Geographical coverage: global

Spatial resolution: 10 degree tiles @ 1km resolution or 1 degree tiles @ 1-hectare resolution

Temporal resolution: Monthly for baseline (1950-2000) and scenario

Development status:

History: TAMMOD developed 1998, modified for FIESTA model 2004, modified for AGUAANDES 2007 and then COMPANDES 2011

Version 1: complete

Version 2: ongoing - Let us know of new features you would find useful


The version 1 model has a basic water balance (wind driven rainfall+fog - actual ET accumulated downstream as runoff) with land use and climate scenarios, see here

Previous version 1

Version 2 has all the components of version 1 but also incorporates soil erosion, transportation, deposition and a snow and ice model as well as policy options for land management, see here

Current version 2 (model in development)

Version 3 is in development

Key users: CPWF, see here

Documentation: Model and data documentation for version 1 can be found here and system (interface and functionality) documentation is here. A presentation on the science behind the PSS can be found here (English) and here (Spanish) [opens in Google docs viewer]. Download: (EN, ES). A powerpoint demo of the system functionality is here (English) and here (Spanish) [opens in Google docs viewer]. Download: (EN, ES)

Key references: Model description: Mulligan and Burke (2005); Mulligan (2012) Model applications: Mulligan et al. (2010); Bruijnzeel, Mulligan and Scatena (2011);

Validation: CompAndes has been validated by the modelling team in a number of studies (see Mulligan and Burke (2005); Bruijnzeel, Mulligan and Scatena (2011). We make the model easy to apply anywhere globally and expect our users to also verify and validate simulation outcomes in their own study sites. As model developers we cannot validate these models for every study site and application that users may have: it is thus the responsibility of those applying these models to validate them for their own application and study site. The FreeStation project can provide equipment to help with this.

Intellectual property: Please do not redistribute or publish on the internet any data or results from these systems in raw GIS form without prior permission from us as we need to ensure that our data provider's licenses are adhered to. If you intend to publish results from this system in the academic literature please send a draft of the paper to us before submission so that we can help ensure that the interpretation is appropriate. If you intend to use this system extensively to deliver the outputs of a funded research or consultancy project, please talk to us before submitting the bid or proposal. To contact us: click here.

Liability: King's College London and AmbioTEK CIC provide these systems without warranty of merchantability or fitness for a particular purpose. We shall not be made liable for any consequential, incidental, indirect, special, punitive or exemplary damages resulting from the use of this software.