Featured Research

from universities, journals, and other organizations

Better flood forecasting is possible

Date:
August 4, 2011
Source:
Cemagref
Summary:
A number of disasters are there to remind us of the vulnerability of life and property to floods. Scientists have now developed better forecasting tools to warn the public and the authorities and enable zones at risk to prepare.

A number of disasters, including Draguignan, Vaison-la-Romaine and the flooding of the Somme, Aude and Gard rivers, are there to remind us of the vulnerability of life and property to floods. For over 20 years, Cemagref scientists have developed forecasting tools to warn the public and the authorities and enable zones at risk to prepare.

GRP flood-forecasting software

For SCHAPI, Cemagref developed the GRP software designed to forecast river flooding. How? By using the rain observations and forecasts supplied by the Meteo-France network for the corresponding river basins and taking soil humidity into account. The software has already been tested in real time on a large number of rivers and can provide warnings ranging from a few hours to a few days depending on the response time of the river basin. The forecasts calculated by GRP are fed into the national flood-warning system (www.vigicrues.gouv.fr) that may be freely consulted on the internet.

Analogues used to enhance forecasting quality

Beyond a few days, quantitative forecasts of flow rates become very imprecise. Forecasts can be improved by looking in the meteorological archives for precipitation data on past situations similar to the forecast situations. In conjunction with the Flood Forecasting agencies, Cemagref has pursued previous work and shown that it is possible to provide a one-week flow-rate forecast for the large Saτne and Seine river basins by coupling the precipitation forecast with the GRP model for rainfall and flow rates.

AIGA1 sounds the alert!

The AIGA system, developed by Cemagref and Meteo-France, uses data supplied by meteorological radars to estimate in real time the risks arising from rainfall and river flow rates over the entire French hydrographic network. AIGA compares the real-time data with information from reference databases on rainfall and flow rates to detect dangerous situations. Risk maps are drawn up every 15 minutes with a resolution down to the square kilometre. AIGA already supplies operational maps to the Flood Forecasting agencies along the Mediterranean coast, with which Cemagref is currently working to evaluate the system.

RHYTMME2 detects risks in mountain regions

In mountain regions, intense, spatially limited precipitations cause torrential flooding, land slides and, in the winter time, avalanches. The meteorological radar network, established in low-lying regions, does not cover mountain regions very well. Cemagref and Meteo-France are working together on the RHYTMME project to set up, in the southern Alps, a network of small, new-generation radars. Two are already operational on Mont Vial (department 06) and Maurel mountain (department 04) and two more will be deployed by 2013. The goal is to create a system for local risk managers capable of forecasting the natural hazards caused by precipitation.

1 AIGA: Geographic-information processing for flood alerts.

2 RHYTMME: Hydrometeorological risks in mountain and Mediterranean regions. The project is funded by the EU, French PACA region, French Ecology ministry and Cemagref.


Story Source:

The above story is based on materials provided by Cemagref. Note: Materials may be edited for content and length.


Cite This Page:

Cemagref. "Better flood forecasting is possible." ScienceDaily. ScienceDaily, 4 August 2011. <www.sciencedaily.com/releases/2011/08/110804081604.htm>.
Cemagref. (2011, August 4). Better flood forecasting is possible. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/08/110804081604.htm
Cemagref. "Better flood forecasting is possible." ScienceDaily. www.sciencedaily.com/releases/2011/08/110804081604.htm (accessed July 31, 2014).

Share This




More Earth & Climate News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) — Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) — Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) — Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Weather Kills 2K A Year, But Storms Aren't The Main Offender

Weather Kills 2K A Year, But Storms Aren't The Main Offender

Newsy (July 30, 2014) — Health officials say 2,000 deaths occur each year in the U.S. due to weather, but it's excessive heat and cold that claim the most lives. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



    Save/Print:
    Share:  

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile iPhone Android Web
    Follow Facebook Twitter Google+
    Subscribe RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins