Hi Robert:
I think that the discrepancy in "time-zero" results gives you a partial sense of the uncertainty of the model, even in the current condition. There will almost always be some discrepancy due to horizontal off-sets between the land-cover and elevation data-sets, general data uncertainty, or other local conditions that make a portion of your site not conform perfectly to the "conceptual model."
Five percent seems pretty good, in my opinion.
-- Jonathan
I think that the discrepancy in "time-zero" results gives you a partial sense of the uncertainty of the model, even in the current condition. There will almost always be some discrepancy due to horizontal off-sets between the land-cover and elevation data-sets, general data uncertainty, or other local conditions that make a portion of your site not conform perfectly to the "conceptual model."
Five percent seems pretty good, in my opinion.
-- Jonathan