[1] Ibn Tofail Univ, Fac Sci, Dept Phys, Kenitra, Morocco
[2] Eduardo Mondlane Univ, Ctr Marine Res & Technol, POB 128, Quelimane, Mozambique
[3] TKM Coll Engn, Dept Civil Engn, Kollam 691005, India
[4] Water Dev Ltd Split, Kvaternikova 7, Split, Croatia