2.4.1 Field calibration of biophysical criteria
The field inspection for the model calibration involved the selection of 3 random analysis points located in an easily accessible location. The purpose of the field inspection was to check whether the dimensions of the selected stream order (between 1 and 2) actually correspond to stream dimensions which are feasible for the construction of small sand dams. The characteristics checked in the field where thus the slope and the cross section between 10 to 20 meters. During the participatory research with the communities, we had further proof that the mulola with section range 10-20 m are the most suitable because smaller mulola (with section below 10 m) were not used by locals since they are too small to accumulate water in the sand for a reasonable time to make the digging work worth it.