Index: dam engine/trunk/src/Deltares.DamEngine.Interface/ConversionHelper.cs
===================================================================
diff -u -r475 -r523
--- dam engine/trunk/src/Deltares.DamEngine.Interface/ConversionHelper.cs	(.../ConversionHelper.cs)	(revision 475)
+++ dam engine/trunk/src/Deltares.DamEngine.Interface/ConversionHelper.cs	(.../ConversionHelper.cs)	(revision 523)
@@ -256,5 +256,35 @@
                                                };
             return translationTable[characteristicPointType];
         }
+
+        /// <summary>
+        /// Converts to waterpressure interpolation model.
+        /// </summary>
+        /// <param name="inputWaterpressureInterpolationModel">The input waterpressure interpolation model.</param>
+        /// <returns></returns>
+        public static WaterpressureInterpolationModel ConvertToWaterpressureInterpolationModel(SoilProfile1DLayerWaterpressureInterpolationModel inputWaterpressureInterpolationModel)
+        {
+            var translationTable = new Dictionary<SoilProfile1DLayerWaterpressureInterpolationModel, WaterpressureInterpolationModel>()
+                                               {
+                                                   {SoilProfile1DLayerWaterpressureInterpolationModel.Automatic,WaterpressureInterpolationModel.Automatic},
+                                                   {SoilProfile1DLayerWaterpressureInterpolationModel.Hydrostatic, WaterpressureInterpolationModel.Hydrostatic}                                                   
+                                               };
+            return translationTable[inputWaterpressureInterpolationModel];
+        }
+
+        /// <summary>
+        /// Converts to input waterpressure interpolation model.
+        /// </summary>
+        /// <param name="waterpressureInterpolationModel">The waterpressure interpolation model.</param>
+        /// <returns></returns>
+        public static SoilProfile1DLayerWaterpressureInterpolationModel ConvertToInputWaterpressureInterpolationModel(WaterpressureInterpolationModel waterpressureInterpolationModel)
+        {
+            var translationTable = new Dictionary<WaterpressureInterpolationModel, SoilProfile1DLayerWaterpressureInterpolationModel>()
+                                               {
+                                                   {WaterpressureInterpolationModel.Automatic,SoilProfile1DLayerWaterpressureInterpolationModel.Automatic},
+                                                   {WaterpressureInterpolationModel.Hydrostatic, SoilProfile1DLayerWaterpressureInterpolationModel.Hydrostatic}
+                                               };
+            return translationTable[waterpressureInterpolationModel];
+        }
     }
 }
\ No newline at end of file
Index: dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs
===================================================================
diff -u -r484 -r523
--- dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs	(.../ConversionHelperTests.cs)	(revision 484)
+++ dam engine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs	(.../ConversionHelperTests.cs)	(revision 523)
@@ -173,5 +173,21 @@
         {
             Assert.AreEqual(inputPointType, ConversionHelper.ConvertToInputPointType(characteristicPointType));
         }
+
+        [Test]
+        [TestCase(SoilProfile1DLayerWaterpressureInterpolationModel.Automatic, WaterpressureInterpolationModel.Automatic)]
+        [TestCase(SoilProfile1DLayerWaterpressureInterpolationModel.Automatic, WaterpressureInterpolationModel.Automatic)]
+        public void CanConvertToWaterpressureInterpolationModel(SoilProfile1DLayerWaterpressureInterpolationModel inputInterpolationModel, WaterpressureInterpolationModel interpolationModel)
+        {
+            Assert.AreEqual(interpolationModel, ConversionHelper.ConvertToWaterpressureInterpolationModel(inputInterpolationModel));
+        }
+
+        [Test]
+        [TestCase(WaterpressureInterpolationModel.Automatic, SoilProfile1DLayerWaterpressureInterpolationModel.Automatic)]
+        [TestCase(WaterpressureInterpolationModel.Automatic, SoilProfile1DLayerWaterpressureInterpolationModel.Automatic)]
+        public void CanConvertToInputWaterpressureInterpolationModel(WaterpressureInterpolationModel inputInterpolationModel, SoilProfile1DLayerWaterpressureInterpolationModel interpolationModel)
+        {
+            Assert.AreEqual(interpolationModel, ConversionHelper.ConvertToInputWaterpressureInterpolationModel(inputInterpolationModel));
+        }
     }
 }