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    • New UKWIR report publishedWe are delighted to announce that our project final report, Deriving a Best Value Water Resources Management Plan, has been published.1404d
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    • New UKWIR report publishedWe are delighted to announce that our project final report, Review of the UKWIR National Failures Database - Business Case, has been published.1414d
    • New UKWIR report publishedWe are delighted to announce that our project final report, Review of the UKWIR National Failures Database, has been published.1414d
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    • New UKWIR report publishedWe are delighted to announce that our project final report, Quantifying and reducing direct greenhouse gas emissions from waste and water treatment processes., has been published.1444d
    • New UKWIR report publishedWe are delighted to announce that our project final report, 86 June - July 2020, has been published.1454d
    • New UKWIR report publishedWe are delighted to announce that our project final report, Asbestos Cement water mains deterioration and failure prediction models, has been published.1463d
    • New Newsletter Available - UKWIR Newsletter Issue 96Click to view the latest UKWIR newsletter1486d
    • New UKWIR report publishedWe are delighted to announce that our project final report, Long Term Performance of Plastic (PE) Pipes, has been published.1487d
    • New UKWIR report publishedWe are delighted to announce that our project final report, Long Term Performance of Plastic (PE) Pipes - Confidential, has been published.1487d
    • New UKWIR report publishedWe are delighted to announce that our project final report, Pharmaceutical reduction at STWs – cost and effectiveness, has been published.1506d
    • New Report Available - Impact of Customer-side Leakage ApproachesNew UKWIR Report published, Click to view online.1524d
    • New Report Available - Ecological impact of other (non soluble reactive) phosphorus fractionsNew UKWIR Report published, Click to view online.1527d
    • New Report Available - Understanding DBP formation: Interpretation of laboratory experiments to operational conditionsNew UKWIR Report published, Click to view online.1528d
     

SAGIS

Welcome to UKWIR’s dedicated SAGIS website, your first port of call for news and information on SAGIS.

What is SAGIS?

The Source Apportionment Geographical Information System (SAGIS) is a discrete ArcGIS-based digital information management and visualisation platform which serves as an integrated system for modelling water quality in rivers and lakes. SAGIS operates in conjunction with the Environment Agency’s SIMCAT water quality model, together referred to as SAGIS-SIMCAT.

SAGIS is, however, most usefully conceptualised as a ‘system’ of interconnected tools and processes made up of mathematical models such as SIMCAT, MPER and RQP, the ArcGIS interface, data on discharge and water quality, river network and hydrology data, and external tools that rely on SAGIS input and output data, including calibration tools and the Environment Agency’s Catchment Optimiser.

SAGIS System

The primary advantage of SAGIS-SIMCAT is that it provides a breakdown of chemical inputs to rivers and lakes from different contributing sectors. This enables Regulators and Water Companies to use a common system to develop effective, evidence-based Programmes of Measures to support asset management and catchment planning functions whilst also maintaining the Polluter Pays Principle.

SAGIS Chart

In the most recent round of business planning for PR19, SAGIS outputs have served as the main evidence base for identifying wastewater treatment works requiring schemes to control discharges of phosphorus. SAGIS-SIMCAT is now firmly embedded within business-as-usual processes and will serve as the regulatory agencies’ (Environment Agency, Natural Resources Wales and the Scottish Environment Protection Agency) primary catchment planning tool until at least 2027. SAGIS-SIMCAT has full coverage of England, Wales and Scotland.

Refer to the ‘Useful links’ page for information on the latest SAGIS related publications and reports and to the ‘Contact us’ page for information on how to obtain SAGIS.

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