River Debris Management System using Off-Grid Photovoltaic Module Intan Mastura Saadon, Herlanda Windiarti, Md Nazri Othman, Emy Zairah Ahmad and Khalil Azha Mohd Annuar MATEC Web Conf., 97 (2017) 01070 Published online: 01 February 2017 DOI: 10.1051/matecconf/20179701070