Abdul-razaaq Jamal, Arwa, Khalid Ysseen Tahaa, and Ghania Abd Al-Majeed Hayawi. 2022. “Experimental Study of Scour Downstream Piano Key Weir Type C With Changing Height of Weir Width of Keys and Apron Solid”. Al-Rafidain Engineering Journal (AREJ) 27 (1):193-204. https://doi.org/10.33899/rengj.2021.130402.1101.