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Re: What is 1D and 2D modelling
In 1D modelling, all hydraulic parameters relevant to a cross-section of a river(or canal) is attributed to a point in the model. Thus it is useful and generally sufficient for general flood routing, discharge and water level estimation in not-so- complex setup. Even lateral flows and reflows could be modelled to a reasonable accuracy.
In 2-D , topography as per contours is better depicted but processing load becomes much higher. Flow parameters are averaged over depth and to that extent approximation is there which may work against getting desired results in understanding dispersion characteristics in a case study as applicable in water quality studies.
Nathan
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