--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQ.java	Wed Oct 05 11:23:18 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQ.java	Wed Oct 05 13:16:44 2011 +0000
@@ -1,9 +1,9 @@
 package de.intevation.flys.artifacts.model;
 
+import de.intevation.flys.utils.DataUtil;
+
 import gnu.trove.TDoubleArrayList;
 
-import java.util.Random;
-
 import org.apache.log4j.Logger;
 
 public class WQ
@@ -117,26 +117,7 @@
     }
 
     public boolean guessWaterIncreasing(float factor) {
-
-        int N = w.size();
-        if (N < 2) return false;
-
-        int samples = (int)(factor*N) + 1;
-
-        int up = 0;
-
-        Random rand = new Random();
-
-        for (int i = 0; i < samples; ++i) {
-            int    pos2 = rand.nextInt(N-1) + 1;
-            if (pos2 == 0) continue;
-            int    pos1 = rand.nextInt(pos2);
-            double w1   = w.getQuick(pos1);
-            double w2   = w.getQuick(pos2);
-            if (w2 > w1) ++up;
-        }
-
-        return up > samples/2;
+        return DataUtil.guessWaterIncreasing(w, factor);
     }
 
     public int [] longestIncreasingWRangeIndices() {