--- a/backend/src/main/java/org/dive4elements/river/importer/ImportRiver.java	Thu Sep 26 22:03:27 2013 +0200
+++ b/backend/src/main/java/org/dive4elements/river/importer/ImportRiver.java	Fri Sep 27 12:11:54 2013 +0200
@@ -941,6 +941,7 @@
         WstParser wstParser = new WstParser();
         wstParser.parse(wstFile);
         wst = wstParser.getWst();
+        wst.setKmUp(wst.guessWaterLevelIncreasing());
     }
 
     public void parseGauges() throws IOException {
@@ -1210,9 +1211,15 @@
     }
 
     public void storeWst() {
-        if (!Config.INSTANCE.skipWst()) {
+        if (wst != null && !Config.INSTANCE.skipWst()) {
             River river = getPeer();
             wst.storeDependencies(river);
+
+            // The flow direction of the main wst and the corresponding
+            // waterlevels determine if the river is 'km_up'.
+            Session session = ImporterSession.getInstance().getDatabaseSession();
+            river.setKmUp(wst.getKmUp());
+            session.save(river);
         }
     }