HydroGeoSphere/Surface Runoff

Default surface flow transport values By default, all surface flow zones (and elements) in the domain will be assigned default transport properties which are listed in Table 5.24: +Table 5.24Table 5.24: Default Values for Surface Flow Transport Properties Parameter Value Unit Longitudinal dispersivity 1.0 m Transverse dispersivity 1.0 m Coupling dispersivity 0.0 m The following instructions can be applied to the surface flow domain, as discussed in Section 5.8.1, to modify the default transport parameters. For each instruction we will indicate its scope (i.e. .grok, .oprops). 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. .oprops) file, it will only affect the named material of which it is a part. Longitudinal dispersivity Scope: .grok .oprops val Longitudinal dispersivity [L], . Analogous to in Equation 2.97. • • • Transverse dispersivity Scope: .grok .oprops val Horizontal component of the transverse dispersivity [L], . Analogous 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. • • • Dry albedo Scope: .grok .oprops Value Dry albedo for soil type, in Equation 2.123. Default value is 0.35. • • • Saturated albedo Scope: .grok .oprops Value Saturated albedo for soil type, in Equation 2.123. Default value is 0.18 • • • Heat coupling length Scope: .grok .oprops Value The heat coupling length [L], is the depth of the surface/subsurface exchange zone used to compute in Equation 2.142. Default value is 1.0 × 10−4 m. • • •