Question about interpolation

Discussion created by caroline_qi on Oct 26, 2011
Latest reply on Oct 27, 2011 by slynch-esristaff
On 3 rivers, I have several surveillance points, which is used to get the water quality data, such as COD and BOD. How can I interpolate the whole three rivers' COD and BOD value using the point value? which method should I choose in Arcgis toolbox? I only want to interpolate the river, not including other places. I think the point on one river may contribute more than the point on the other river.