Water Environment Consultants

Sweco provides end-to-end, nature-positive consultancy and engineering services, with a strong track record in delivering solutions that balance ecological health with infrastructure requirements for both public and private sectors.

Our expertise spans flood risk, drainage, hydrology, hydrogeology, hydraulic modelling, water quality, sustainability, and regulatory compliance. We cover all project stages from feasibility to construction and handover, shaping innovative and practical strategies that are tailored to meet specific client and stakeholder needs.

We recognise the Water Environment’s vital role in supporting wildlife, promoting recreational opportunities, and ensuring safe drinking water for communities. With our innovative solutions, we expertly balance ecological health with human activities and infrastructure, paving the way for a sustainable future as part of the Green Transition.

Services for contractors

Flood Risk

  • Strategic advice
  • Flood Risk Assessment
  • Hydraulic modelling (1D-2D)
  • Flood warning and evacuation plans
  • Climate change adaptation
  • Flood Risk Activity Permits (FRAPs)
  • Hydrology

Drainage

  • Surface and foul water drainage strategies
  • Sustainable drainage systems (SuDS)
  • Drainage design
  • Drainage maintenance strategies
  • Network modelling build, verification and optimisation
  • CSOs

Water Resources

  • Environmental Impact Assessment – water resources and flood risk
  • Environmental permitting and consent
  • River engineering
  • River condition assessment
  • Water and nutrients neutrality
  • Water Framework Directive (WFD) and Water Quality Assessment
  • Geomorphology

Hydrogeology

  • Strategic advice
  • Dewatering
  • Groundwater monitoring
  • Abstraction licensing
  • Infiltration testing
  • Groundwater modelling
  • Surface water and groundwater resource development, management, protection
  • Regulatory engagement

Services for developers

Due diligence

  • Strategic Advice/Masterplanning Support
  • Flood Risk & Drainage
  • Hydrogeological appraisal
  • Initial assessment of sustainability credits (BREEAM, etc.)

Planning support

  • Flood Risk/Consequences Assessment (FRA)/(FCA)
  • Flood Resilience
  • Hydraulic Modelling (1D & 2D)
  • River condition assessment / River Engineering
  • Flood Warning & Evacuation Plan
  • Below-ground Drainage Strategy
  • Sustainable Drainage Systems (SuDS)
  • Drainage Maintenance Strategy Foul Water Strategy
  • EIA input – Water
  • Resources and Flood Risk
  • Water Neutrality
  • Nutrient Neutrality
  • Water Framework Directive (WFD) & Water Quality Assessment
  • Geomorphology
  • MoRPh Survey
  • Scour Assessment
  • Hydrogeology (e.g., Dewatering, monitoring)]
  • Environmental Permitting and Consents Abstraction Licensing
  • Surface Water & Groundwater Resource
  • Development, Management, Protection

Discharge of Conditions

  • Detailed below-ground
  • Drainage Design
  • Drainage Impact
  • Assessment (DIA) – Detailed Sewer Modelling Flood Risk Conditions
  • Hydrogeology Conditions

Our water specialists have all the skills required for a sustainable management of water resources. We protect surface and groundwater quality and champion nature-based solutions to manage water availability and flood risk. From long term regional water resources management plans to local studies, we ensure our clients always meet their regulatory obligations while promoting innovation, resilience and cost-effective solutions.   

Enrico Isnenghi Water Environment Department Manager

Lead Local Flood Authority Support

  1. Planning, Consent and Expert Witness

  2. Section 19 Flood Investigations

  3. Groundwater Specialist Advice

  4. Flood Alleviation Schemes

    1. Hydraulic Modelling (1D & 2D)
    2. Optioneering / Economic Analysis and feasibility
    3. Flood Resilience
    4. Local Flood Risk Management Strategy Update / Refresh
    5. SWMP
    6. Detailed Design
    7. Scour Assessment
  5. SuDS
    1. Training
    2. Schedule 3 implementation
    3. Maintenance and Operational advice / strategy
    4. Retrofit / rehabilitation
    5. Detailed design

Your Water Environment contacts

Enrico Isnenghi

Water Environment Department Manager

Geraldine Angus

Operations Director – Civil Engineering

Gurdeep Bansal

Technical Manager – Drainage

Harriet Carlyle

Hydrogeology (Groundwater) Lead

Andy Smith

Technical Director – Flood Risk

Mandy Surradge

Technical Manager – Water Modelling

Climate-focused consultancy

Water is an invaluable resource for human life and the environment. Its sustainable management is essential and requires a strategic approach to protect and enhance water quality – and its availability – while at the same time managing any potential associated flood risk. This is made even more urgent by the impact that climate change is already having on water resources, with an increased frequency and magnitude of flooding in parallel to prolonged periods of drought.

Our water resources experts – a team of teams covering all key aspects of hydrology consultancy – offer the wide and interconnected range of services needed for the joined-up management of water – more specifically of surface water.

  1. Our hydraulic modelling specialists add the expertise needed to investigate flood risk constraints and help our clients to identify development options and solutions which are both safe and do not increase flood risk elsewhere.
  2. We design SuDS to deliver multifunctional benefits, which will result in improvements in water quality and biodiversity, as well as benefits for amenity. This supports the sustainable development of our cities proving green/blue infrastructure in the public realm and highways on behalf of developers, highways authorities and lead local flood authorities.
  3. We help developers in unlocking complex sites assessing flood risk management options from the feasibility stage and developing drainage solutions which are embedded into the masterplanning process, developed through planning and progressed into the detailed design stage.
  4. We monitor and protect water quality integrating our surface and groundwater specialisms and supporting water companies and highways authorities.

We work for a wide range of clients including local authorities, water companies, highways authorities, developers and contractors. We support any type of project embedding flood risk mitigation measures and resilience into the design from the feasibility stage down to the detailed design stage.

There is no sustainable development without sustainable water management. We’re proud to help our clients in their goals to protect water resources, optimise their use and improve their resilience to flood risk.

Together with our clients and the collective knowledge of our 22,000 engineers, consultants and other specialists, we co-create solutions to address urbanisation, capture the power of digitalisation, and make our societies more sustainable.​ With international multi-disciplinary teams, we can call on the right insight and technical capability at the right time from across Buildings, Infrastructure, Advisory & Planning and Compliance.​
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