Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs
===================================================================
diff -u -rebdbf01f6ab35a28b3a306145796ce532920af62 -rf7a0b62177d09fb02de673c29f7d153775c5608d
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs	(.../StabilityPointStructuresCalculationService.cs)	(revision ebdbf01f6ab35a28b3a306145796ce532920af62)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs	(.../StabilityPointStructuresCalculationService.cs)	(revision f7a0b62177d09fb02de673c29f7d153775c5608d)
@@ -253,7 +253,7 @@
                 calculation.InputParameters.LevellingCount,
                 calculation.InputParameters.ProbabilityCollisionSecondaryStructure,
                 calculation.InputParameters.FlowVelocityStructureClosable.Mean,
-                calculation.InputParameters.FlowVelocityStructureClosable.StandardDeviation,
+                calculation.InputParameters.FlowVelocityStructureClosable.CoefficientOfVariation,
                 calculation.InputParameters.InsideWaterLevel.Mean,
                 calculation.InputParameters.InsideWaterLevel.StandardDeviation,
                 calculation.InputParameters.AllowedLevelIncreaseStorage.Mean,
@@ -325,7 +325,7 @@
                 calculation.InputParameters.LevellingCount,
                 calculation.InputParameters.ProbabilityCollisionSecondaryStructure,
                 calculation.InputParameters.FlowVelocityStructureClosable.Mean,
-                calculation.InputParameters.FlowVelocityStructureClosable.StandardDeviation,
+                calculation.InputParameters.FlowVelocityStructureClosable.CoefficientOfVariation,
                 calculation.InputParameters.InsideWaterLevel.Mean,
                 calculation.InputParameters.InsideWaterLevel.StandardDeviation,
                 calculation.InputParameters.AllowedLevelIncreaseStorage.Mean,
@@ -397,7 +397,7 @@
                 calculation.InputParameters.LevellingCount,
                 calculation.InputParameters.ProbabilityCollisionSecondaryStructure,
                 calculation.InputParameters.FlowVelocityStructureClosable.Mean,
-                calculation.InputParameters.FlowVelocityStructureClosable.StandardDeviation,
+                calculation.InputParameters.FlowVelocityStructureClosable.CoefficientOfVariation,
                 calculation.InputParameters.InsideWaterLevel.Mean,
                 calculation.InputParameters.InsideWaterLevel.StandardDeviation,
                 calculation.InputParameters.AllowedLevelIncreaseStorage.Mean,
@@ -469,7 +469,7 @@
                 calculation.InputParameters.LevellingCount,
                 calculation.InputParameters.ProbabilityCollisionSecondaryStructure,
                 calculation.InputParameters.FlowVelocityStructureClosable.Mean,
-                calculation.InputParameters.FlowVelocityStructureClosable.StandardDeviation,
+                calculation.InputParameters.FlowVelocityStructureClosable.CoefficientOfVariation,
                 calculation.InputParameters.InsideWaterLevel.Mean,
                 calculation.InputParameters.InsideWaterLevel.StandardDeviation,
                 calculation.InputParameters.AllowedLevelIncreaseStorage.Mean,
@@ -590,7 +590,7 @@
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_InsideWaterLevel_DisplayName)),
                 new NormalDistributionRule(input.InsideWaterLevelFailureConstruction,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_InsideWaterLevelFailureConstruction_DisplayName)),
-                new NormalDistributionRule(input.FlowVelocityStructureClosable,
+                new VariationCoefficientNormalDistributionRule(input.FlowVelocityStructureClosable,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_FlowVelocityStructureClosable_DisplayName)),
                 new NormalDistributionRule(input.ModelFactorSuperCriticalFlow,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_ModelFactorSuperCriticalFlow_DisplayName)),
@@ -644,7 +644,7 @@
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_InsideWaterLevel_DisplayName)),
                 new NormalDistributionRule(input.InsideWaterLevelFailureConstruction,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_InsideWaterLevelFailureConstruction_DisplayName)),
-                new NormalDistributionRule(input.FlowVelocityStructureClosable,
+                new VariationCoefficientNormalDistributionRule(input.FlowVelocityStructureClosable,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_FlowVelocityStructureClosable_DisplayName)),
                 new NormalDistributionRule(input.ModelFactorSuperCriticalFlow,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_ModelFactorSuperCriticalFlow_DisplayName)),
@@ -698,7 +698,7 @@
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_InsideWaterLevel_DisplayName)),
                 new NormalDistributionRule(input.InsideWaterLevelFailureConstruction,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_InsideWaterLevelFailureConstruction_DisplayName)),
-                new NormalDistributionRule(input.FlowVelocityStructureClosable,
+                new VariationCoefficientNormalDistributionRule(input.FlowVelocityStructureClosable,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_FlowVelocityStructureClosable_DisplayName)),
                 new NormalDistributionRule(input.DrainCoefficient,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_DrainCoefficient_DisplayName)),
@@ -752,7 +752,7 @@
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_InsideWaterLevel_DisplayName)),
                 new NormalDistributionRule(input.InsideWaterLevelFailureConstruction,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_InsideWaterLevelFailureConstruction_DisplayName)),
-                new NormalDistributionRule(input.FlowVelocityStructureClosable,
+                new VariationCoefficientNormalDistributionRule(input.FlowVelocityStructureClosable,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsStabilityPointStructuresFormsResources.Structure_FlowVelocityStructureClosable_DisplayName)),
                 new NormalDistributionRule(input.DrainCoefficient,
                                            ParameterNameExtractor.GetFromDisplayName(RingtoetsCommonFormsResources.Structure_DrainCoefficient_DisplayName)),