Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs
===================================================================
diff -u -r8e8f8c83c45656f65adaa8e47600379dc5ae8f61 -r7faf338152aa99f81c7169781c4971fe7b7bbfd3
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs	(.../StabilityPointStructuresCalculationService.cs)	(revision 8e8f8c83c45656f65adaa8e47600379dc5ae8f61)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs	(.../StabilityPointStructuresCalculationService.cs)	(revision 7faf338152aa99f81c7169781c4971fe7b7bbfd3)
@@ -309,7 +309,7 @@
                 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,
@@ -381,7 +381,7 @@
                 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,
@@ -451,7 +451,7 @@
                 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,
@@ -521,7 +521,7 @@
                 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,
@@ -640,7 +640,7 @@
                                            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)),
@@ -694,7 +694,7 @@
                                            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)),
@@ -748,7 +748,7 @@
                                            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)),
@@ -802,7 +802,7 @@
                                            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)),