Update readGroundwaterSettings.m

in case the groundwater level <= 0 cm (groundwater level >= top level of soil), there is no soil profile and the model will crash. To avoid that, assign a minimum groundwater level = of 1 cm

src/+groundwater/readGroundwaterSettings.m

@@ -50,6 +50,7 @@ soilThick           cumulative soil layers thickness (from top to bottom)
     % Check that the position of the water table is within the soil column
     if gw_Dep <= 0
         warning('The soil is fully saturated up to the land surface level!');
+        gw_Dep = 1.0; % to avoid model crashing, assign minimum gw_Dep value of 1 cm        
     elseif gw_Dep > ModelSettings.Tot_Depth
         warning('Groundwater table is below the end of the soil column!');
     end