removing 0.4 in runoff*0.4, no longer needed as not back calculating

src/ac/ed/lurg/landuse/IrrigationRasterSet.java

@@ -51,11 +51,8 @@ public class IrrigationRasterSet extends RasterSet<IrrigationItem> {
 
 			}
 
-			Double fpuRunOffAvailable = fpuRunOff * 0.4 * ModelConfig.ENVIRONMENTAL_WATER_CONSTRAINT; // 0.4
-																										// from
-																										// elliott
-																										// paper
-
+			Double fpuRunOffAvailable = fpuRunOff * ModelConfig.ENVIRONMENTAL_WATER_CONSTRAINT; 
+			
 			otherUses = fpuManager.fpuOtherUses.get(fpu.getInt()).get(year) * waterAvailabilityAdj;
 			if (fpuRunOffAvailable - otherUses < 0) {
 				waterAvailForIrrigPerCell = 0;