Index: /issm/trunk-jpl/src/m/classes/hydrologyglads.m
===================================================================
--- /issm/trunk-jpl/src/m/classes/hydrologyglads.m	(revision 27389)
+++ /issm/trunk-jpl/src/m/classes/hydrologyglads.m	(revision 27390)
@@ -71,5 +71,5 @@
 			%Channels
 			md = checkfield(md,'fieldname','hydrology.ischannels','numel',[1],'values',[0 1]);
-			md = checkfield(md,'fieldname','hydrology.channel_conductivity','numel',[1],'>',0);	
+			md = checkfield(md,'fieldname','hydrology.channel_conductivity','size',[md.mesh.numberofvertices],'>=',0,'NaN',1,'Inf',1);	
 			md = checkfield(md,'fieldname','hydrology.channel_sheet_width','numel',[1],'>=',0);	
 
@@ -118,5 +118,5 @@
 			%Channels
 			WriteData(fid,prefix,'object',self,'class','hydrology','fieldname','ischannels','format','Boolean');
-			WriteData(fid,prefix,'object',self,'class','hydrology','fieldname','channel_conductivity','format','Double');
+			WriteData(fid,prefix,'object',self,'class','hydrology','fieldname','channel_conductivity','format','DoubleMat','mattype',1);
 			WriteData(fid,prefix,'object',self,'class','hydrology','fieldname','channel_sheet_width','format','Double');