Hydraulic Roughness Calculator R package HYDROCAL version 1.0.0 Estimates frictional constants for hydraulic analysis of rivers. This HYDRaulic ROughness CALculator (HYDROCAL) was previously developed as a spreadsheet tool and accompanying documentation by McKay and Fischenich (2011, <https://erdc-library.erdc.dren.mil/jspui/bitstream/11681/2034/1/CHETN-VII-11.pdf>). Software Depends: R (>= 4.1.0) Colton Shaw <shawcol@oregonstate.edu> Comprehensive R Archive Network (CRAN) Colton Shaw [aut, cre] (ORCID: <https://orcid.org/0000-0002-4812-2555>), S. Kyle McKay [aut] (ORCID: <https://orcid.org/0000-0003-2703-3841>) GPL-3 2023-02-14 application/tgz https://CRAN.R-project.org/package=HYDROCAL doi:10.32614/CRAN.package.HYDROCAL