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:

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
 * 1) val Longitudinal dispersivity [L], $${\alpha}_{lo}$$. Analogous to $${\alpha}_l$$ in Equation 2.97.
 * &bull; &bull; &bull;

Transverse dispersivity
Scope: .grok .oprops
 * 1) val Horizontal component of the transverse dispersivity [L], $${\alpha}_t$$. Analogous to $${\alpha}_t$$ in Equation 2.97.
 * &bull; &bull; &bull;

Coupling dispersivity
Scope: .grok .oprops
 * 1) val Dispersivity value [L] to be applied during exchange between the overland flow and subsurface domains.

Default value is 0.0.
 * &bull; &bull; &bull;

Dry albedo
Scope: .grok .oprops
 * 1) Value Dry albedo for soil type, $${\alpha}_{dry}$$ in Equation 2.123. Default value is 0.35.
 * &bull; &bull; &bull;

Saturated albedo
<tt>Scope: .grok .oprops</tt>
 * 1) Value Saturated albedo for soil type, $${\alpha}_{sat}$$ in Equation 2.123. Default value is 0.18
 * &bull; &bull; &bull;

Heat coupling length
<tt>Scope: .grok .oprops</tt>
 * 1) Value The heat coupling length [L], is the depth of the surface/subsurface exchange zone used to compute $${\alpha}_o$$ in Equation 2.142. Default value is 1.0 × 10−4 m.
 * &bull; &bull; &bull;