SHAMKHI, Mohammed Siwan; ATTAB, Zainab Shakir. Estimation of Manning’s Roughness Coefficient for Tigris River by Using HEC-RAS model. Wasit Journal of Engineering Sciences, [S. l.], v. 6, n. 3, p. 90–97, 2018. DOI: 10.31185/ejuow.Vol6.Iss3.107. Disponível em: http://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/107. Acesso em: 5 apr. 2026.