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Access to coastal and fluvial flood data

For coastal and fluvial flooding, we refer to the three national-level and publicly available datasets below. Please refer to the Assumptions & limitations page for more information about the datasets.

Composite water depth

Composite water depth maps for European Floods Directive (EFR) types A, B, C & D.
Data owner	National Water and Flood Information System (LIWO) / Rijkswaterstaat
Data access	Which areas protected by primary flood defences can flood (EFR type B). Which unprotected areas along the primary water system can flood (EFR type A). Which areas protected by regional flood defences can flood (EFR type C). Which unprotected areas along the regional water system can flood (EFR type D).
Description	These water depth maps are composed based on individual flooding scenarios and show. The maps depict potential floods that will not all occur simultaneously in reality.
Available time horizons	Current situation
Available climate scenarios	LIWO does not contain future climate projections of flood depth (see Assumptions & limitations).
Year produced	2024 (the national maps are updated several times a year).
Spatial resolution	25 x 25 metres (the underlying flooding scenarios have a grid size ranging from 5x5 to 100x100 metres. Everything is scaled to 25x25 metres).
Source documentation	About this dataset

Location-specific flood probability

Location-specific flood probability
Data owner	National Water and Flood Information System (LIWO) / Rijkswaterstaat
Data access	Location-specific flood probability – current Location-specific flood probability - 2050
Description	Maps that indicate the probability that a location will experience a particular flood event within one year. The flood probability from both the primary and regional systems are combined. The datasets offer different flood depths: > 0 centimetre, > 20 centimetres, > 50 centimetres, and > 200 centimetres. At a flood depth of > 0 centimetre, all available flood scenarios are combined. This is done by applying the standard, conservative method of determining probabilities. Please refer to the Assumptions & limitations.
Available time horizons	Current situation 2050
Available climate scenarios	LIWO does not contain future climate projections of flood depth (see Assumptions & limitations).
Year produced	2024 (the national maps are updated several times a year).
Spatial resolution	5 x 5 metres (the underlying flooding scenarios have a grid size ranging from 5x5 to 100x100 metres. Everything is scaled to 5x5 metres).
Source documentation	About this dataset

Flood scenarios with impact maps

flood scenarios with impact maps.
Data owner	National Water and Flood Information System (LIWO) / Rijkswaterstaat
Data access	Single Flood Scenarios Combining Multiple Flood Scenarios
Description	Individual flood scenarios for breaches of the primary and regional flood defences. The scenarios include often include flood depths, flow velocities, water ascent rates, arrival time, expected damage, expected number of victims, and expected number of people affected. The maps often include different return periods as well.
Available time horizons	Current situation
Available climate scenarios	LIWO does not contain future climate projections of flood depth (see Assumptions & limitations).
Year produced	2024 (the national maps are updated several times a year).
Spatial resolution	Depends per flood scenario ranging from 5x5 to 100x100 metres. Everything is scaled to 5x5 metres.
Source documentation	About this dataset