I received two very positive comments, both reviewers though the manuscript could be an excellent paper after revision. Dr. H. Class suggested the manuscript need a minor revision and he provided detailed opinions about the revision. Dr. J. Bensabat suggested a major revision. Both reviewers think the developed method is very good, but the cases studied in the manuscript cannot represent a real field, heterogeneity is not large enough and the field site is not a regional one.

I believe this manuscript could be a very good paper. Please provide your detailed responses to the comments and questions by the two reviewers, and revise your manuscript accordingly.

The two reviewers give very positive comments to the manuscript. The manuscript would be accepted if the authors could fix the technical problems pinpointed by reviewer 1.