Global Flood Forecast
 
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INFO
TIMESERIES DATA
GRIDDED DATA

Global Flood Forecast by Deltares

Floods are one of the main risks for coastal cities worldwide. To assist worldwide early warning for flood risk assessments and analyses Deltares presents this data viewer. This viewer presents the results of the GLObal Flood Forecasting Information System (GLOFFIS) and the GLObal Storm Surge Information System (GLOSSIS) of Deltares. These forecasts can be used for early warning in those areas currently lacking any forecasting capability, or can provide boundary conditions for more refined local models.

Frequency and lead time of forecasts

The models run operationally 2-4 times a day and provide forecasts for the upcoming 7-10 days on soil moisture, discharge, snow water equivalent, water level and surge. The models are forced with various meteorological data (e.g. wind, precipitation) which are also shown in the viewer.

How to use?

The tab gridded data allows you to visualize several input and output parameters on global scale. These data can be found when clicking the data folder. By pressing the play button in the lower left of the screen you can see the current forecast for the coming days.

To show scalar time series data, click any of the orange or green dots. The number in the dots indicates the amount of locations that are available in that area. When zooming in this bigger dot will split up in the individual locations. At locations where observations are available it is possible to plot compare the observation with the forecast and analyse the model results.

The results of the Global storm surge model (coastal locations) and Global flood forecasting model (inland locations) are presented each in their own tab.

The colored (mostly black) coastlines indicate where an event is forecasted. By clicking the coast segment it is possible to see the simulated water levels and whether they reach a threshold.

To easily see whether a threshold is reached the coastlines are colored as follows:

Black =  no threshold
Yellow =  1/2 year
Orange =  1/10 year
Red =  1/50 year

How to get the data?

A subset of the datasets are available for download these can be requested by sending an email to:
helpdeskdata@deltares.nl

Please feel free to contact us as well if you are interested in other services, such as, but not limited to:

  • Higher resolution global results
  • Scalar time series at certain locations
  • Longer lead time forecasts
  • Providing boundary conditions for regional models
  • More detailed regional models

Conditions of Use Global Flood Forecast website Deltares

If you require a printed version of this legal agreement on the conditions of use of this website, e.g. prior to accepting these terms and conditions, please find this at

This is a legal agreement between you –either as individual or acting on behalf of a legal entity- and Deltares.  The use of this website of Deltares is subject to the conditions of this agreement set out below.

By marking the “I Agree”-checkbox:

  1. you expressly declare being authorized to act on behalf of the legal entity (User) you represent for the purposes of accepting this user agreement (hereafter “User Agreement”);
  2. User expressly accepts this User Agreement and accepts to be legally bound by the terms and conditions contained therein.

If you are not authorized to act on behalf of User to agree upon this User Agreement, please do not mark the “I agree” checkbox and exit this website. Furthermore do not mark the “I Accept” checkbox and end the visit to this website if User does not agree with the License Agreement.

 

Purpose Website & Allowed Use: Assistance only

This website is set-up to provide assistance to early warning for flood risk assessments and analyses. It provides flooding forecasts (hereinafter “Forecasts”) which can be used for early warning in those areas currently lacking any forecasting capability, or can provide boundary conditions for more refined local models. User agrees not to use the Website of Forecasts for operational purposes such as, but not limited to, providing flood forecasts to third parties or the general public.   

Own Risk and Expense

User agrees that the use of this Website and the resulting Forecasts is at your and User’s own risk and expense. Although this Website and the Forecasts have been set up with the greatest possible care, these are provided “AS-IS” without any warranty of any kind. Deltares expressly disclaims any implied warranty or merchantability, fitness for a particular purpose, or for failure of performance and any and all liability for any loss or damage whatsoever suffered as a result of your use of reliance upon this Website and/or the Forecasts.

Furthermore Deltares does not guarantee that the Website is free of viruses and works without errors and/or interruptions. Furthermore Deltares does not give any guaranty with respect to the Website or the Forecasts, its functioning or the correctness or quality thereof.

No liability, indemnification for claims resulting from your use

User agrees  that Deltares (including its personnel and non-employees who (have) undertake(n) activities for Deltares) shall not be responsible to User for any loss-of-profit, direct, indirect, incidental special or consequential damages arising out of the User Agreement or the use of the Website or the Forecasts,  except for damages caused by willful misconduct or gross negligence of Deltares.

User shall indemnify, hold harmless and defend Deltares against any action brought by a third party against Deltares and/or its officers, directors, employees or agents to the extent that such a claim is connected to the use of the Website and/or the Forecasts by User and/or third parties at whose disposal User has placed the Forecasts

Website

User agrees that Deltares may amend the contents of the Website, including the provisions of these conditions at any time. Furthermore, the Website may contain links to websites of third parties. These links are selected with all possible care. However, Deltares cannot guarantee the contents and the functioning of the website of third parties.

Copyright

Unless stated differently, all intellectual property rights in connection with the Website, including the software, texts, images and sounds, are vested exclusively in Deltares, in its affiliates or its contractors. This means among other things that it is not permitted, without the prior, written permission of Deltares to make public, reproduce and/or modify the information of the Websites, except for personal, non-commercial use or in so far as otherwise permitted under mandatory law.

The Websites may only be used for legitimate purposes, in a manner that cannot in any way (i) harm Deltares or (ii) infringe the rights and the enjoyment of use of third parties.

Netherlands law applies to the Websites and also to these conditions.

Privacy statement

This Website does not process any personal data

About Deltares

This Website and the Forecasts have been composed by, or at any rate by order of, Stichting Deltares, with its registered office in Delft (2629 HV) and its principal place of business at Boussinesqweg 1 (hereinafter called: Deltares). Deltares is registered with the Chamber of Commerce and Industry under number 41146461. Other contact details are: telephone: + 31 (0)88 335 8273 ; fax: + 31 (0)88 335 8582 ; email:info@deltares.nl.

 

Storm surge model results

To show scalar time series data for the coastal sites, click any of the green dots, the number in the green dot indicates the amount of locations that are available in that area. When zooming in these other locations will become visible and available to investigate.

Alert levels

The colored (mostly black) coastlines indicate where an event is forecasted. By clicking the coast segment it is possible to see the simulated water levels and whether they reach a threshold.

To easily see whether a threshold is reached the coastlines are colored as follows:

Black =  no threshold
Yellow =  1/2 year
Orange =  1/10 year
Red =  1/50 year

Comparing the data

At locations where observations are available it is possible to compare the observation with the forecast and analyse the model results.


Parameter


INFO

The above graph shows the time series of the selected location and parameter. By clicking any of the items in the legend the graph will zoom to the extent of the data. Select multiple parameters to compare observations with the model results.

Feedback?

If you have any feedback or remarks on the quality of the data in the area, where you have observations. Please contact us at:
helpdeskdata@deltares.nl

Flood forecasting model results

To show scalar time series data for the riverine sites, click any of the orange dots, the number in the orange dot indicates the amount of locations that are available in that area. When zooming in these other locations will become visible and available to investigate.

Comparing the data

At locations where observations are available it is possible to compare the observation with the forecast and analyse the model results.

 
Parameter


INFO

The above graph shows the time series of the selected location and parameter. By clicking any of the items in the legend the graph will zoom to the extent of the data. Select multiple parameters to compare observations with the model results.

Feedback?

If you have any feedback or remarks on the quality of the data in the area, where you have observations. Please contact us at:
helpdeskdata@deltares.nl


INFO

This menu allows you to browse trough the available data. By clicking the eye, you can make a layer visible or hide it. The data of the models is available in the folder "Gridded data layers (Click to show)". Click that layer to open it and see the available data.