What type of natural hazards do you investigate? Pleas be carefull, hazard assessment needs a lot of experience, information on historical events as well as knowledge of the specific terrain. I do not know any usefull open source software. For Alpine natural hazards (debris flows and snow avalanches) we developed RAMMS ( http://ramms.slf.ch). But this is no open source tool.

Try ILWIS software provide many tools for Mapping the terrain/causative parameters and integrate the factors using various model for hazard and risk assessment. First decide your model then create database finally integrate.

Thank you

Thanks for sharing the information.

The Delisting Risk Assessment Software (DRAS) is a user-friendly, stand-alone software program that calculates the potential risks associated with disposing a given waste stream to a landfill or surface impoundment. For a given waste stream, the DRAS calculates both the waste's aggregate risks and also back-calculates each waste constituent's maximum allowable concentration permissible for delisting. DRAS requires the user to assign a target cancer risk and hazard index.

Its open source for sure.

HAZUS MR5 u can try its open source

For Earthquake hazards, I would recommend HAZUS. It is free but you have to have license for ArcGIS 9.3. However, it needs comprehensive database for building, infrastructures and socio-economic aspects. As it is data demanding software, you should be very cautious before using it

Integrated Land and Water Information System (ILWIS) is a very good software for your purposes and it's free. Of course if you can find a license for HAZUS, i think that it is better. It depends on what are you looking for.

I think the easiest way is integrating one of the vulnerability methods with the Land-Use in the area

You can use several GIS software as QGIS, gvSIG or even python routines. I use heatmaps to show railways incident risk, browse my pubs

Nasser Good can you elaborate this can be applicable to the Floods

CAMEO and ALOHA are best software's for emergency management ,

For more details please find the link..

http://www.epa.gov/osweroe1/content/cameo/aloha.htm

Regarding Landslide and flood risk, my office is developing specific tools that can maybe be adapted to your needs; if you go to the web site (www.cfumbria.it) you can find more info (e.g. LANDWARN for landslide early warning systems). Anyway those are focused on EW purposes..

and here some references on RG for the Francesco's suggestion:

https://www.researchgate.net/publication/235915376_Landwarn_an_operative_early_warning_system_for_landslides_forecasting_based_on_rainfall_thresholds_and_soil_moisture?ev=srch_pub

https://www.researchgate.net/publication/229238760_Assessment_of_rainfall_thresholds_and_soil_moisture_modeling_for_operational_hydrogeological_risk_prevention_in_the_Umbria_region_(central_Italy)?ev=srch_pub

Chapter Landwarn: An Operative Early Warning System for Landslides F...

Article Assessment of rainfall thresholds and soil moisture modeling...

Luca can you send me above papers at [email protected]

Amol, you can easily download the papers from "Research Gate".

Let me know if you find some issues.

Ponziani Francesco pl the website recommended by you is not in Englidh pl help

You're right unfortunately so far only a small part, a brief description of the early warning system for landslides is in English. I send you the above document and other info at your mail, and as soon as my collegue finish to translate a doc for flood prediction i will send that to you

HAZUS is an useful software for hazard and risk assessment.

You can get more information on http://www.fema.gov/hazus-software#1

I am using HAZUS MH4 and HAZUS Canada 2.1 for risk analysis. HAZUS can be applied for food, hurricane and earthquakes.

Ya of course, Its best one, however, Buidlings codes are based on US . You have to modify /customize according to your region

Please visit NOAA website look for RVAT (risk vulnerability assessment tools)

Dear Mohammed,

Beyond the HAZUS (that lauch a new version last December) you can use Capra developed by WolrdBank.