Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 8121)
+++ trunk/data/validator/deprecated.mapcss	(revision 8135)
@@ -398,2 +398,9 @@
   suggestAlternative: {1.key};
 }
+
+/* see #11223 */
+*[waterway=wadi] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "{0.key}=* + intermittent=yes";
+  suggestAlternative: "natural=valley";
+}