Hi Mulugeta Genanu,

You can maybe have look to these links for further informations:

https://www.researchgate.net/publication/263582319_Stream_Width_-_An_ArcGIS_Toolbox_for_Calculating_Stream_Width

https://www.youtube.com/watch?v=Dag4qn1guug

and/or directly try to send a mail to the authors.

Sincerely yours,

Brian F

Thanks dear Brian and I had those information and I'm contacting Dr. Salman who is the author of this documents.

I can't get the addin tool in my ArcGIS 10.2 and I want to get this tool to install it and perform my task.

if you having any trouble while using this tool . You can also choose HEC GEORAS tool for river width and depth calculation.