B.Gjunsburgs & E.Govsha Departmentof Water Engineering and Technology, Riga Technical University, Latvia, Riga, Azenes16/20 gjunsburgs@bf.rtu.lv; jelena.govsa@rtu.lv   Abstract River flow contraction by engineering structures (intakes, embankment, abutments, spurs, guide banks) to flow leads to flow pattern modification, concentration of streamliners, sharp drop in water level, local increase in velocity, and development of scour hole. Damages […]