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Pau is a Principal Environmental Consultant in the Water Management practice at AtkinsRéalis and a recognised technical leader in water‑quality modelling and catchment planning. He is the lead developer of SAGIS (UKWIR), the primary water‑quality catchment planning tool used by environmental regulators in the UK, and a Defra Business‑Critical Model (BCM). He also leads development of the River Quality Planning (RQP) tool for the Environment Agency. Together, these tools support regulatory decision‑making and the allocation of millions of pounds of investment across AMP cycles.

Pau has over 12 years’ experience in the water sector; delivering water‑quality modelling, source‑apportionment assessments, and GIS‑based environmental analysis. He has acted as technical lead for tools and modelling solutions supporting catchment management, nutrient mitigation, climate‑change impact assessment and permit optioneering. His technical skillset includes statistical and machine‑learning methods, and the analysis of large geospatial datasets to inform water policy and infrastructure planning. He has worked closely with regulatory bodies including the Environment Agency and SEPA.

Pau is a Marie Curie laureate and holds an international PhD in Water Science and Technology, an MSc in Environmental Engineering, and a BSc in Environmental Science. He is a Chartered Environmental Manager (C.WEM) with CIWEM, has served on scientific committees for international conferences, and has authored multiple peer‑reviewed publications. He is also an experienced project manager, information manager and line manager

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