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System Analyses

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Cause and Effect

The parameters, compared between each other is based on a cross-impact matrix. In fig XX, the wind, precipitation, landuse and sea currents turn out to be the dominant parameters, while stratification, sediment and pollution is highly dependent and affected by other parameters. A factor that stands out is pollution, as it has a very low cause value but a total effect value of  18.

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Flow chart

The connection between the chosen parameters that affect the area is illustrated in fig. XX is a flowchart, that is based on the same cross-impact matrix that is used in fig. XX Cause-Effect diagram. The ones who highly affect the others is marked with a dark thick arrow, and further on the lighter colours represent a weaker influencing effect. The landuse, sediment and the discharge from river as well as precipitation is stated to have the greatest impact of pollution spreading. Those with no impact is not illustrated in the figure. Sea currents, wind and pollution are parameters that has lower impact on the other parameters.
 

Mean, minimum and maximum values of some representative elements in the different terraces. The lines represent the background mean values in soils of the world (Bowen, 1979) and of the South-Portuguese Zone (Galán et al. 2008).

Flow chart over the different parameters that influences the system. where the different arrows represent; slight influence (dotted arrows), moderate influence (light grey arrows), strong influence (thinner dark arrows) and crucial influence (thick arrows).

Mean, minimum and maximum values of some representative elements in the different terraces. The lines represent the background mean values in soils of the world (Bowen, 1979) and of the South-Portuguese Zone (Galán et al. 2008).
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