---
id: engines/deltares-delft3d
about:
  depiction: engines/deltares-delft3d.jpg
  label: Deltares Delft3D
  description: >-
    Deltares' Delft3D FM Suite models water flow, transport of matter and
    morphology in coastal, estuarine and river environments.
  tags:
    - hydrodynamics
    - coast
    - rivers
tool:
  form: Modeling suite
  group: Water and flooding
  homepage: >-
    https://www.deltares.nl/en/software-and-data/products/delft3d-flexible-mesh-suite
open:
  source: unknown
  data: unknown
  api: unknown
  participation: unknown
domains:
  - water
relations:
  - predicate: answers
    target: questions/flooding
provenance:
  origin: agent
  sources:
    - title: Delft3D Flexible Mesh Suite
      url: >-
        https://www.deltares.nl/en/software-and-data/products/delft3d-flexible-mesh-suite
  reviewed: '2026-10-18'
  reviewed_by: 'Claude, from the sources listed'
  status: proposed
---
Delft3D FM Suite 2D3D is a modelling suite from Deltares, a hydraulic research institute, for coastal, estuarine and river environments. It simulates water flow in two and three dimensions on a flexible mesh, including tidal drying and flooding of flats, density-driven flow from temperature and salinity differences, transport of matter, the hydrodynamic effect of works such as land reclamation, breakwaters and dikes, and the recirculation of cooling water from a power plant; Deltares offers a hydro-morphodynamics package alongside.

Deltares describes the users as consultants, engineers, contractors, regulators and government officials, and the suite as usable by non-experts through its Delta Shell graphical interface, with Python scripting for batch runs.

It runs on Windows and, for the computational core, Linux; a model needs administrator rights to install and from 1 GB of memory upwards depending on size. The latest validated release is Delft3D FM Suite 2026.01, distributed through Deltares service packages ordered by email; the page read does not state a licence or price.