HydroGeoSphere/Discrete Fractures

Default discrete fracture transport values By default, all fracture zones (and elements) in the domain will be assigned default transport properties which are listed in Table 5.22: +Table 5.22Table 5.22: Default Values for Discrete Fracture Transport Properties Parameter Value Unit Longitudinal dispersivity 1.0 m Transverse dispersivity 0.1 m The following instructions can be applied to discrete fractures, as discussed in Section 5.8.1, to modify the default transport parameters. For each instruction we will indicate its scope (i.e. .grok, .fprops). Recall that if an instruction is used in the prefix.grok file, it will affect the current set of chosen zones, while in a properties (e.g. .fprops) file, it will only affect the named material of which it is a part. Longitudinal dispersivity Scope: .grok .fprops val Longitudinal dispersivity [L], similar to in Equation 2.97. • • • Transverse dispersivity Scope: .grok .fprops val Transverse dispersivity [L], similar to in Equation 2.97. • • • Coupling dispersivity Scope: .grok .oprops val Dispersivity value [L] to be applied during exchange between the overland flow and subsurface domains. Default value is 0.0. • • •