3.2Linking 1D and 2D Domains
TUFLOW 1D and 2D domains can be linked in a variety of ways as illustrated in Figure 3 .3 (Benham, et al, 2003). The simplest approach is to replace part of a 1D model by nesting a 2D domain inside the broader scale 1D model as shown in Sketch 1a in Figure 3 .3. This approach was developed by Syme (1991) and has been widely applied through various versions of the TUFLOW software since 1990.
Further refinements to TUFLOW were incorporated during the late 1990s to be able to:
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Insert 1D networks “underneath” a 2D domain or through, for example, an embankment (see Figure 3 .4 and Sketch 1b in Figure 3 .3).
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Replace or “carve” a 1D channel through a 2D domain (see Figure 3 .5 and Sketch 1c in Figure 3 .3).
Future enhancements planned are to extend the linking to allow nesting of 2D domains to each other.
Figure 3.3 1D/2D Linking Mechanisms
Figure 3.4 Modelling a Pipe System in 1D underneath a 2D Domain
Figure 3.5 Modelling a Channel in 1D and the Floodplain in 2D
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