Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculation.cs
===================================================================
diff -u -r4539b4546747c257739b1695b9ebc9c29e393ffe -r7f45f1f08a4e6849984063d43bfecfd949b3c3fb
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculation.cs	(.../GrassCoverErosionInwardsCalculation.cs)	(revision 4539b4546747c257739b1695b9ebc9c29e393ffe)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculation.cs	(.../GrassCoverErosionInwardsCalculation.cs)	(revision 7f45f1f08a4e6849984063d43bfecfd949b3c3fb)
@@ -103,7 +103,11 @@
             InputParameters.Orientation = new RoundedDouble(RoundedDouble.MaximumNumberOfDecimalPlaces, 5.5);
 
             // CriticalFlowRate
-            InputParameters.CriticalFlowRate = new LognormalDistribution(3);
+            InputParameters.CriticalFlowRate = new LognormalDistribution(4)
+            {
+                Mean = new RoundedDouble(4,0.004),
+                StandardDeviation = new RoundedDouble(4,0.0006)
+            };
 
             // Dike and Foreshore
             var dikeSections = new[]
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs
===================================================================
diff -u -rdec46d5efaad5332ffb2a96e67ec11209ddc5515 -r7f45f1f08a4e6849984063d43bfecfd949b3c3fb
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision dec46d5efaad5332ffb2a96e67ec11209ddc5515)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision 7f45f1f08a4e6849984063d43bfecfd949b3c3fb)
@@ -56,7 +56,10 @@
             orientation = new RoundedDouble(2);
             dikeHeight = new RoundedDouble(2);
             BreakWater = new BreakWater(BreakWaterType.Caisson, 0);
-            criticalFlowRate = new LognormalDistribution(2);
+            criticalFlowRate = new LognormalDistribution(4)
+            {
+                Mean = new RoundedDouble(4,0.004),StandardDeviation = new RoundedDouble(4,0.0006)
+            };
             DikeGeometry = Enumerable.Empty<RoughnessProfileSection>();
             ForeshoreGeometry = Enumerable.Empty<ProfileSection>();
         }