--- a/artifacts/src/main/java/org/dive4elements/river/exports/minfo/SedimentLoadExporter.java	Mon Sep 16 09:17:33 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/minfo/SedimentLoadExporter.java	Mon Sep 16 09:52:28 2013 +0200
@@ -107,6 +107,8 @@
         }
     }
 
+
+    /** Return space when val is NaN, apply NumberFormat otherwise. */
     private String numberToString(NumberFormat valf, double val) {
         if (Double.isNaN(val)) {
             return " ";
@@ -114,6 +116,14 @@
         return valf.format(val);
     }
 
+    /** Return space when val is NaN or zero, apply NumberFormat otherwise. */
+    private String nonZeroToString(NumberFormat valf, double val) {
+        if (Double.isNaN(val) || val == 0d) {
+            return " ";
+        }
+        return valf.format(val);
+    }
+
     /** Write a line. */
     private void writeRecord(
         CSVWriter writer,
@@ -133,7 +143,7 @@
             numberToString(valf, fraction.getSand()),
             numberToString(valf, fraction.getFineMiddle()),
             numberToString(valf, fraction.getCoarse()),
-            numberToString(valf, fraction.getTotal())
+            nonZeroToString(valf, fraction.getTotal())
         });
     }