List of Articles Piano key weir (PKW) Open Access Article Abstract Page Full-Text 1 - Analysis of energy loss in a C-type trapezoidal Piano key weir with outlet key jumps Kadhim Challoob Mshali Ali khoshfetrat Amirhossein Fathi https://doi.org/10.30486/TSWS.2023.783133 Open Access Article Abstract Page Full-Text 2 - Experimental study of the effect of obstacles on flow energy loss in piano key weir Shimaa Ezzaldine Ibrahi Ali Khoshfetrat https://doi.org/10.30486/TSWS.2023.783335