Hydrology, flood risk assessment and drainage solutions across the UK
H Fraser Consulting are a hydrology consulting firm offering support to developers and consultants. We offer clear advice at every stage of the planning process. We work closely with local authorities to resolve flood-related issues efficiently and effectively. Early-stage flood risk assessments help avoid unnecessary design costs and planning delays by ensuring sites are suitable from the outset.
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Hydrology, flood risk and drainage consultants
H Fraser Consulting is a hydrology consulting firm who can deliver tailored, science-based solutions to help you move forward with your project with confidence. With extensive experience in hydrology, flood risk assessment, and sustainable drainage design, our team delivers innovative and reliable solutions tailored to both urban and rural environments. We provide strategic insights and technical support from initial feasibility and planning to detailed design and implementation. We also offer pre-app advice, support with planning submissions, regulator responses and planning condition discharge.
Enquire todayOur hydrology consulting services include:
Services for construction and development
- Flood risk assessment (FRA)
- Screening, scoping and detailed site-specific Flood Risk Assessments
- Sequential and exception tests
- Flood mitigation appraisal and design
- Flood modelling
- Drainage strategies, SuDS drawings & calculations
- Natural Flood Management feasibility studies
- Regulator responses and maintenance plans
Sustainable Drainage Assessment (SuDS)
- Outline drainage assessments (to inform development layouts)
- Detailed drainage assessments (for planning applications)
- Estimation of changes in runoff rates or volumes
- Estimation of attenuation volumes required
- SuDS drainage design – runoff control, water quality, amenity, biodiversity, maintenance and adoption including runoff control, water quality, amenity, biodiversity, maintenance and adoption
- Quantification of SuDS impact on water quality
- Surface water management
- Industry standard drainage modelling
Baseline hydrological studies
- Hydrology, Flood Risk, Drainage, Groundwater and Water Quality
- Chapters for Environmental Impact Assessment (EIA)
- Environmental discharge permits
- H1 Assessment (discharge to surface water)
- Consultation and regulatory negotiation with Environment Agency, Natural Resources Wales, SEPA, Local Authorities, Water Companies and other stakeholders.
Drainage and flooding investigations
- Water balance
- Groundwater flooding
- Wetland design & restoration
- Evaluation of SuDS effectiveness (catchment scale)
- Water quality improvement
- Site walkover and features surveys
- Intrusive site investigation and testing
- Soakaway / drainage assessments & percolation testing
Water supply
- Scoping or feasibility studies for new water supplies
- Private water supply risk assessment and mitigation
- Investigations into water supply contamination and quantity issues
- Rainwater harvesting – bespoke assessments and design of rainfall harvesting systems
- Protection strategies
- Water chemistry testing
Water quality
- Water quality monitoring plans
- In-situ and extractive sampling methods
- Surface water and groundwater monitoring strategies
- Private water supply water quality and quantity monitoring
- Water Quality chapter for Environmental Impact Assessment
Natural Flood Management (NFM): working with Natural Processes
- Concept and design understanding of NFM measures: leaky barriers, runoff attenuation, offline storage, floodplain reconnection, wetland creation, riparian planting, soil management, ponds and swales
- Catchment scale hydraulic modelling for assessment and design of NFM schemes
- Guidance on potential grant access and construction costs
- Strong partnerships with ecologists
Other services
- Expert Witness
- Independent audit
- Independent objective review of planning applications
- Water balance
- GIS/Digital Mapping
- Site walkover and field surveys
- Catchment conceptualisation
Contact us today to see how we can help.
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