1 files changed, 12 insertions, 0 deletions
diff --git a/src/water.h b/src/water.h
index 62cfc37e2..db52600ee 100644
--- a/src/water.h
+++ b/src/water.h
@@ -16,6 +16,18 @@
 #include "company_type.h"
 #include "slope_type.h"
 
+/**
+ * Describes the behaviour of a tile during flooding.
+ */
+enum FloodingBehaviour {
+	FLOOD_NONE,    ///< The tile does not flood neighboured tiles.
+	FLOOD_ACTIVE,  ///< The tile floods neighboured tiles.
+	FLOOD_PASSIVE, ///< The tile does not actively flood neighboured tiles, but it prevents them from drying up.
+	FLOOD_DRYUP,   ///< The tile drys up if it is not constantly flooded from neighboured tiles.
+};
+
+FloodingBehaviour GetFloodingBehaviour(TileIndex tile);
+
 void TileLoop_Water(TileIndex tile);
 bool FloodHalftile(TileIndex t);
 void DoFloodTile(TileIndex target);