The Flood Specialists
Flood risk intelligence and water engineering for South Africa
Delta Hydro Engineers (Pty) Ltd delivers defensible floodline determinations, flood risk assessments, and stormwater management plans for developers, municipalities, and consulting engineering firms — plus flood exposure work for insurers and the custom software that water teams actually use.
Not sure of scope yet? Just tell us about your site — no obligation, and we reply within one business day.
Three pillars, one practice
We are a hydrology and hydraulics practice that does three things — and is honest about which of them are services delivered by our team today, and which are platforms we are still building.
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Consulting
Defensible hydrology, hydraulics, and stormwater studies for South African projects.
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Flood Risk Intelligence
Flood hazard mapping, exposure quantification, and claims-dispute support for insurers and risk users.
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Custom Software
QGIS plugins, dashboards, and bespoke water-engineering applications.
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Who we work with
Pick the audience closest to you and we will surface the offerings most relevant to that work — from consulting services through to flood risk intelligence and custom software.
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Flood & Stormwater Services for Developers
Floodlines, SMPs, and flood risk advice for South African property developers at rezoning, planning, and detailed-design stages.
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Stormwater & Flood Services for Municipalities
Stormwater management plans, floodline determinations, and flood hazard mapping for South African municipalities.
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Sub-consultancy for Consulting Engineering Firms
Specialist hydrology, hydraulics, and flood modelling capacity for consulting engineering firms on a sub-consultancy basis.
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Drainage & Flood Studies for Roads & Rail
Drainage, culvert design, scour protection, and flood studies for roads and rail corridors in South Africa.
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Flood Risk Intelligence for South African Insurers
Flood hazard mapping, portfolio exposure, claims-dispute support, and post-event loss modelling for SA insurers. Expert engagements today; platform ahead.
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Water Management for Mining Operations
Mine water balances, TSF studies, pit dewatering, and flood studies for South African mining operations.
Flood risk intelligence — coverage today
We are building toward national coverage. Each offering below shows where it stands today.
Available today with established methodology.
Available for selected regions; expanding nationally.
We are building toward national coverage. Each offering above shows where it stands today — production, beta, or roadmap. The consolidated insurance platform is in development; the rest is delivered as expert engagements right now.
Featured consulting services
Each service page documents methodology, deliverables, South African standards context, and FAQs — so your reviewer, regulator, or peer can trace what we did and why.
- Floodline Determination
Defensible floodline mapping for SA planning & municipal review. HEC-RAS/MIKE workflows, GIS-ready outputs. Request a quote — Delta Hydro Engineers.
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Flood Risk AssessmentQuantified flood risk for developers, mines, and public-sector projects. Clear scenarios & mitigation options. Request a quote — Delta Hydro Engineers.
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Stormwater Management PlansCatchment-ready stormwater management plans for municipal approvals, WSUD, and buildable controls. Delta Hydro Engineers — request a quote.
- Hydraulic Modelling
1D/2D hydraulic modelling with HEC-RAS & MIKE for floodlines, structures, and consequence mapping. Delta Hydro Engineers.
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Mine Water ManagementIntegrated runoff, pond & return-water planning for mines and TSFs. Compliance-focused hydrology — Delta Hydro Engineers.
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Dam Safety EvaluationsHydraulic inputs for dam safety evaluations aligned to SANCOLD expectations & DWS context. Delta Hydro Engineers — SA.
Knowledge Centre
Explainers & free calculators
How return periods, the Rational Method, design rainfall, and terrain data actually work in South African practice — plain-language explainers by our engineers, plus free screening calculators for time of concentration, flood risk, and peak flows.
Latest from the blog
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What Happens if You Build Inside a Floodline in South Africa?The consequences of building inside a floodline in South Africa — refused plans, enforcement, insurance and resale problems — and the legitimate ways forward.
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How Much Does a Floodline Study Cost in South Africa?What drives the cost of a floodline study in South Africa — survey scope, modelling complexity, data availability — and how to get an accurate quote.
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How Long Does a Floodline Determination Take? A Realistic TimelineA phase-by-phase timeline for a floodline determination in South Africa — what a realistic programme looks like, what speeds it up, and what causes delays.
Sectors and standards
Who our consulting work serves
Greenfield and infill residential and commercial developers, open-pit and underground mining houses, district and metropolitan municipalities, roads and rail environments, and consulting firms that need specialist hydrology or hydraulic modelling capacity on a sub-consultancy basis.
South African context
Our work routinely references SANS 10400-H, municipal stormwater and flood line policies, SANRAL drainage guidance where applicable, and DWS flood line and water-use processes — always tied to the specific site, catchment, and receiving environment you are working in.
Where we work
We support projects nationwide and prepare location-specific briefs for major centres. Each city hub links to every consulting discipline we offer, with introductory context for that region's climate, topography, and typical authority questions.
Tell us the geography, the audience, and the problem you are trying to solve. We will tell you what we can deliver today, what is on the roadmap, and what a scoped proposal looks like.
Talk to an engineer