--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation4.java	Tue Jan 22 15:13:58 2013 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation4.java	Wed Jan 23 05:53:44 2013 +0100
@@ -15,8 +15,6 @@
 
 import de.intevation.flys.utils.DoubleUtil;
 
-import gnu.trove.TDoubleArrayList;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -276,14 +274,20 @@
         }
 
         // Generate the "Umhuellende".
-        QKms [] qkms = generateInfolding(table, results, from, to, step);
+        ConstantWQKms [] infoldings =
+            generateInfolding(table, results, from, to, step);
 
         // TODO: Use qkms in a new result type.
+        WQKms [] newResults = new WQKms[results.length + infoldings.length];
+        System.arraycopy(
+            results, 0, newResults, 0, results.length);
+        System.arraycopy(
+            infoldings, 0, newResults, results.length, infoldings.length);
 
-        return new CalculationResult(results, this);
+        return new CalculationResult(newResults, this);
     }
 
-    protected QKms [] generateInfolding(
+    protected ConstantWQKms [] generateInfolding(
         WstValueTable wst,
         WQKms []      results,
         double        from,
@@ -295,20 +299,22 @@
         InfoldingColumns ic = new InfoldingColumns(columns);
         ic.markInfoldingColumns(results);
 
-        List<QKms> infoldings = new ArrayList<QKms>();
+        List<ConstantWQKms> infoldings = new ArrayList<ConstantWQKms>();
 
         boolean [] infoldingColumns = ic.getInfoldingColumns();
 
         double [] kms = null;
+        double [] ws  = null;
 
         for (int i = 0; i < infoldingColumns.length; ++i) {
             if (!infoldingColumns[i]) {
                 continue;
             }
 
-            kms = kms == null
-                ? DoubleUtil.explode(from, to, step)
-                : (double [])kms.clone();
+            if (kms == null) {
+                kms = DoubleUtil.explode(from, to, step);
+                ws  = new double[kms.length];
+            }
 
             QRangeTree.QuickQFinder qf =
                 columns[i].getQRangeTree().new QuickQFinder();
@@ -319,19 +325,16 @@
             // TODO: i18n
             String name = "Umh\u00fcllende " + columns[i].getName();
 
-            QKmsImpl qkms = new QKmsImpl(
-                new TDoubleArrayList(kms),
-                new TDoubleArrayList(qs),
-                name);
+            ConstantWQKms infolding = new ConstantWQKms(kms, qs, ws, name);
 
             if (numProblems() > numProblemsBefore) {
-                qkms.removeNaNs();
+                infolding.removeNaNs();
             }
 
-            infoldings.add(qkms);
+            infoldings.add(infolding);
         }
 
-        return infoldings.toArray(new QKms[infoldings.size()]);
+        return infoldings.toArray(new ConstantWQKms[infoldings.size()]);
     }
 
     protected String createName(int index) {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ConstantWQKms.java	Wed Jan 23 05:53:44 2013 +0100
@@ -0,0 +1,30 @@
+package de.intevation.flys.artifacts.model;
+
+public class ConstantWQKms
+extends      WQKms
+{
+    public ConstantWQKms() {
+        this("");
+    }
+
+    public ConstantWQKms(String name) {
+        super(name);
+    }
+
+    public ConstantWQKms(int capacity) {
+        this(capacity, "");
+    }
+
+    public ConstantWQKms(int capacity, String name) {
+        super(capacity, name);
+    }
+
+    public ConstantWQKms(double [] kms, double [] qs, double [] ws) {
+        this(kms, qs, ws, "");
+    }
+
+    public ConstantWQKms(double [] kms, double [] qs, double [] ws, String name) {
+        super(kms, qs, ws, name);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java	Tue Jan 22 15:13:58 2013 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java	Wed Jan 23 05:53:44 2013 +0100
@@ -11,6 +11,7 @@
 
 import de.intevation.flys.artifacts.model.Calculation4;
 import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.ConstantWQKms;
 import de.intevation.flys.artifacts.model.CrossSectionWaterLineFacet;
 import de.intevation.flys.artifacts.model.DataFacet;
 import de.intevation.flys.artifacts.model.EmptyFacet;
@@ -70,16 +71,22 @@
                 nameQ = "Q(" + nameW + ")";
             }
 
-            Facet w = new WaterlevelFacet(
-                i, DISCHARGE_LONGITUDINAL_W, nameW);
+            // Do not generate Waterlevel/Waterline facets 
+            // for Q only curves.
+            if (!(wqkms[i] instanceof ConstantWQKms)) {
+
+                Facet w = new WaterlevelFacet(
+                    i, DISCHARGE_LONGITUDINAL_W, nameW);
+
+                Facet s = new CrossSectionWaterLineFacet(i, nameW);
+
+                facets.add(s);
+                facets.add(w);
+            }
 
             Facet q = new WaterlevelFacet(
                 i, DISCHARGE_LONGITUDINAL_Q, nameQ);
 
-            Facet s = new CrossSectionWaterLineFacet(i, nameW);
-
-            facets.add(s);
-            facets.add(w);
             facets.add(q);
 
             if (wqkms[i] instanceof WQCKms) {