--- a/artifacts/src/main/java/org/dive4elements/river/exports/HistoricalDischargeCurveExporter.java	Wed Nov 13 08:10:00 2013 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/HistoricalDischargeCurveExporter.java	Wed Nov 13 11:32:47 2013 +0100
@@ -32,6 +32,7 @@
 import org.dive4elements.artifacts.CallMeta;
 
 import org.dive4elements.river.artifacts.D4EArtifact;
+import org.dive4elements.river.artifacts.access.HistoricalDischargeAccess;
 import org.dive4elements.river.artifacts.model.CalculationResult;
 import org.dive4elements.river.artifacts.model.HistoricalDischargeData;
 import org.dive4elements.river.artifacts.model.Timerange;
@@ -60,8 +61,11 @@
     public static final String CSV_DISCHARGE_HEADER =
         "export.historical.discharge.csv.header.discharge";
 
-    public static final String CSV_DIFF_HEADER =
-        "export.historical.discharge.csv.header.diff";
+    public static final String CSV_DIFF_HEADER_W =
+        "export.historical.discharge.csv.header.diff.w";
+
+    public static final String CSV_DIFF_HEADER_Q =
+        "export.historical.discharge.csv.header.diff.q";
 
     public static final String CSV_GAUGENAME_HEADER =
         "export.historical.discharge.csv.header.gaugename";
@@ -141,11 +145,14 @@
 
 
     protected void writeCSVHeader(CSVWriter writer) {
+        HistoricalDischargeAccess hda = new HistoricalDischargeAccess((D4EArtifact) master);
         writer.writeNext(new String[] {
             msg(CSV_TIMERANGE_HEADER, CSV_TIMERANGE_HEADER),
             msg(CSV_WATERLEVEL_HEADER, CSV_WATERLEVEL_HEADER),
             msg(CSV_DISCHARGE_HEADER, CSV_DISCHARGE_HEADER),
-            msg(CSV_DIFF_HEADER, CSV_DIFF_HEADER),
+            (hda.getEvaluationMode() == HistoricalDischargeAccess.EvaluationMode.W)
+                ? msg(CSV_DIFF_HEADER_W, CSV_DIFF_HEADER_W)
+                : msg(CSV_DIFF_HEADER_Q, CSV_DIFF_HEADER_Q),
             msg(CSV_GAUGENAME_HEADER, CSV_GAUGENAME_HEADER)
         });
     }