Flood Modeller

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) The topic of this article may not meet Wikipedia's notability guidelines for products and services. Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention. If notability cannot be shown, the article is likely to be merged, redirected, or deleted. Find sources: "Flood Modeller" – news · newspapers · books · scholar · JSTOR (February 2015) (Learn how and when to remove this message) This article may have been created or edited in return for undisclosed payments, a violation of Wikipedia's terms of use. It may require cleanup to comply with Wikipedia's content policies, particularly neutral point of view. (December 2021) (Learn how and when to remove this message)

Flood Modeller is a computer program developed by Jacobs that assesses flood risk by simulating the flow of water through river channels, urban drainage networks and across floodplains using a range of one- and two-dimensional hydraulic solvers. The software incorporates a user interface for building, running and viewing the results of models, including a GIS map interface.

The software has been independently benchmarked^[1] by the Environment Agency and is used extensively^[2] to undertake modelling of flood risk,^[3] develop flood risk management schemes and provide flood forecasting services.^[4]

Initially developed by Halcrow Group and then CH2M Hill, Flood Modeller is now developed by Jacobs Solutions. Flood Modeller was previously known as "ISIS" (after the local name for the Upper Thames).

Flood Modeller includes steady-state and unsteady 1D river solvers for modelling open-channels.

It also provides a 1D urban solver for modelling urban drainage systems.

Flood Modeller includes three different 2D solvers:

• The ADI solver is based on the DIVAST numerical engine first developed in the 1980s, and is designed to simulate fluvial, overland, estuarine and coastal situations where flow does not rapidly change.^[5]
• The TVD solver is designed to represent rapid changes in the water surface profile, but results in longer run-times.
• The FAST solver uses simplified hydraulics to perform rapid assessments of flooding.^[6][7]

• Hydrology
• Surface-water hydrology
• Hydrological transport model
• HEC-RAS
• SWMM
• GIS
• Computer simulation

• Flood Modeller website