The integer grid will not have decimal part, thus if the precision higher than 1 km 2 is needed before using INT function, the grid xxxargs must be multiplied by a number large enough to preserve required number of decimal places. For example, to have precision of 1 ha, grid xxxargs must be multiplied by 100. Here, the precision of 1 km 2 is high enough. ArcView does not have such requirements to perform joining two tables. The error can be calculated using grid algebra .
Station is on good river but the delineated watershed boundaries are wrong.
It can not be solved just by deleting the station. Then check if there are rivers from RF1 that cross the delineated watershed boundaries. Each cell that represent this line will be assigned a specified value. The flow direction can be adjusted in ArcInfo Grid Editing Tools. If we want to cut the river , we have to change the value in the cell in which the flow path should be disconnected.