Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationService.cs
===================================================================
diff -u -r2a896243ca24205f8e98db1b61e8148d1d9b9062 -r8e8f8c83c45656f65adaa8e47600379dc5ae8f61
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationService.cs	(.../ClosingStructuresCalculationService.cs)	(revision 2a896243ca24205f8e98db1b61e8148d1d9b9062)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationService.cs	(.../ClosingStructuresCalculationService.cs)	(revision 8e8f8c83c45656f65adaa8e47600379dc5ae8f61)
@@ -274,7 +274,7 @@
                 calculation.InputParameters.StructureNormalOrientation,
                 calculation.InputParameters.ModelFactorSuperCriticalFlow.Mean, calculation.InputParameters.ModelFactorSuperCriticalFlow.StandardDeviation,
                 calculation.InputParameters.LevelCrestStructureNotClosing.Mean, calculation.InputParameters.LevelCrestStructureNotClosing.StandardDeviation,
-                calculation.InputParameters.WidthFlowApertures.Mean, calculation.InputParameters.WidthFlowApertures.CoefficientOfVariation,
+                calculation.InputParameters.WidthFlowApertures.Mean, calculation.InputParameters.WidthFlowApertures.StandardDeviation,
                 calculation.InputParameters.DeviationWaveDirection);
         }
 
@@ -305,7 +305,7 @@
                 generalInput.ModelFactorSubCriticalFlow.Mean, generalInput.ModelFactorSubCriticalFlow.CoefficientOfVariation,
                 calculation.InputParameters.ThresholdHeightOpenWeir.Mean, calculation.InputParameters.ThresholdHeightOpenWeir.StandardDeviation,
                 calculation.InputParameters.InsideWaterLevel.Mean, calculation.InputParameters.InsideWaterLevel.StandardDeviation,
-                calculation.InputParameters.WidthFlowApertures.Mean, calculation.InputParameters.WidthFlowApertures.CoefficientOfVariation);
+                calculation.InputParameters.WidthFlowApertures.Mean, calculation.InputParameters.WidthFlowApertures.StandardDeviation);
         }
 
         private static StructuresClosureFloodedCulvertCalculationInput CreateFloodedCulvertCalculationInput(
@@ -403,8 +403,8 @@
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_ModelFactorSuperCriticalFlow_DisplayName)),
                 new NumericInputRule(input.FactorStormDurationOpenStructure,
                                      ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_FactorStormDurationOpenStructure_DisplayName)),
-                new VariationCoefficientNormalDistributionRule(input.WidthFlowApertures,
-                                                               ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_WidthFlowApertures_DisplayName)),
+                new NormalDistributionRule(input.WidthFlowApertures,
+                                           ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_WidthFlowApertures_DisplayName)),
                 new NumericInputRule(input.StructureNormalOrientation,
                                      ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_StructureNormalOrientation_DisplayName)),
                 new LogNormalDistributionRule(input.FlowWidthAtBottomProtection,
@@ -433,8 +433,8 @@
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_ModelFactorSuperCriticalFlow_DisplayName)),
                 new NumericInputRule(input.FactorStormDurationOpenStructure,
                                      ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_FactorStormDurationOpenStructure_DisplayName)),
-                new VariationCoefficientNormalDistributionRule(input.WidthFlowApertures,
-                                                               ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_WidthFlowApertures_DisplayName)),
+                new NormalDistributionRule(input.WidthFlowApertures,
+                                           ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_WidthFlowApertures_DisplayName)),
                 new LogNormalDistributionRule(input.FlowWidthAtBottomProtection,
                                               ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_FlowWidthAtBottomProtection_DisplayName)),
                 new VariationCoefficientLogNormalDistributionRule(input.StorageStructureArea,