Nice little software for simulating the uncertainties during abnormal events.Its completely free if you have smalll projects.You have to buy the Paid version for bigger projects. ISIS by Halcrow - Cost effective, integrated river modelling solutions : "ISIS provides engineers, environmental scientists, planners and managers with a flexible and cost-effective range of tools for proactive decision making to help manage our environment. It is a suite of modular software solutions used for simulating water flow, hydrology, water quality changes and sediment transport in rivers, floodplains, canals, estuaries, catchments and urban areas. ISIS is suitable for a wide range of engineering and environmental applications, from calculating simple backwater profiles to modelling entire catchments. Applications include flood risk assessments, developing catchment management plans, flood alleviation scheme designs, river engineering and irrigation schemes, environmental impact assessments, ...
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