Add degree of saturation (deg_sat) as hydraulic output variable#3
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Compute and export deg_sat at three points: t=0 initialization, start_time_step resume, and each time-step iteration. Formula: S_r = 1 - (unsaturated_thickness * delta_theta) / (soil_thickness * theta_sat) where unsaturated_thickness = clip(soil_thickness - sat_from_top - sat_from_bottom, 0). The clip naturally handles wetting front / GWT overlap (full saturation).
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Compute and export deg_sat at three points: t=0 initialization, start_time_step resume, and each time-step iteration.
Formula: S_r = 1 - (unsaturated_thickness * delta_theta) / (soil_thickness * theta_sat) where unsaturated_thickness = clip(soil_thickness - sat_from_top - sat_from_bottom, 0). The clip naturally handles wetting front / GWT overlap (full saturation).