Object tree

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The object tree can be identified in the left region of the Riskan window, as shown in the quick guide. In this tree you have all objects that compose you analysis.

All objects have some common characteristics. For example, you can change the name of any object in the tree by selecting it and pressing F2. By right clicking the selected object, you have access to the object menu, where you can select functions or commands on that object.

The objects are organized in a logical way. A site has one or more maps, so the map objects are placed below the site object. The individual risk object that appears below an initial event object show the individual risk of that specific event. The individual risk object that appears below the site object contains the individual risk for all the region of interest.


Each object is an element of the analysis, as shown below.

Icon Object Description
File.png File It is the "root" directory, and there is only one opened at any time. It represents the file in which we are working. When you save the file, this element receives the name of the actual file
Site.png Site The name of the target plant for analysis. Usually you have only one site per file, but it is not restricted
Mapa.png Map The map, aerial photo or blue print of the region of interest. You may have more than one map per site, for example, you can have a aerial photo and a blue print of the same region of interest
Atmc.png Atmospheric condition A site can have one or more atmospheric conditions. These conditions consists of data such as temperature, air humidity, wind direction probability and other. These conditions are taken in account in several models
Popl.png Population A population is a definition of an area on the map where there are people. Each population has its polygon delimitation and a number of inhabitants. This number of inhabitants may vary according to the situation (day, night, etc.) and may be indoors or outdoors
Even.png Initial event A initial event describes the accidental hypothesis origin, for example, rupture of a vessel, leakage of a duct, and so on
Modl.png Simulation To estimate the damage caused by the initial event, you must execute one or more simulations using mathematical models. These simulations will receive some input data and produce an output, which may contain damage estimation or input data for other models
Cenr.png Partial simulation Some models take into account some of the atmospheric conditions. If you have more than one atmospheric condition you may have several possible results for the same simulation. The partial simulation show the result of one simulation for one specific atmospheric condition
Graf.png Chart Some models produce results that can be shown in a chart
Vuln.png Vulnerability If the simulation outputs damage results you may plot the vulnerable area to that effect. It is useful for estimating the size of the risk to that effect or is may be a final result from the system if you are elaborating a vulnerability study.
Anim.png Isopleths If the simulation outputs a cloud dispersion, you can create a plot of the cloud isopleths over the map
Mpop.png Population distribution To perform the social risk calculation, Riskan interpolates the user defined Populations in a matrix with certain number of inhabitants in each cell. This object is generated and updated automatically by the system each time you calculate the risks
Isor.png Individual risk This object contains the result for the individual risk calculation, such as iso risk curves and individual mean risk
Iprc.png Frequency pressure Contains the result for the pressure frequency distribution calculation. This balanced distributions indicates where should be placed the emergency rescues and the calculation for the expected annual material damage
Rsks.png Social risk This object contains the result for the social risk calculation, such as FN curve, mean social risk and the list of most relevant scenarios
Acid.png Scenario risk This object contains partial information calculated during the risk calculation. It is generated during the risk calculation and may be used to view the risk in one specific situation