Hi @Igor09 -
The NDR coefficient table that is in the User Guide is intended only to show the format of the table, not to be used for standard or default coefficient values for real projects. Of course, you may use those values to make tests. But then for more official versions, you would want to gather your own data values, and even if they are global average values from the NatCap literature database, keep a record of the source of each value.
It is hard to find efficiency and length values in particular, and I wish I could point you to great sources. Perhaps someone else has done work in Brazil who would be willing to share their information? The User Guide provides a few papers that address riparian buffers, and you can use those values to get started. And it says that if you don’t have data for crit_len_n, you can use the cell size as the default, and we have done that before (assuming that your cell size isn’t very tiny.)
I know that it’s hard to work with this kind of non-optimal data, because we want to get the best local values, and it’s frustrating that even relatively simple models can have inputs that are difficult to find. It’s a lot of time and effort too!