Local Scouring Visualization of Bed Channel Surface in Hydraulic Structure Using Surfer

Abstract. Water flowing in the river causes a scouring event that occurs at bed channel. The existence of will increase along with changes geometry and obstacles such as weir which are followed by local around weir. Local often downstream end sill weakens its construction. Scouring measurement was conducted to monitor pattern occurs. By using Surfer software, visualization through Data Grid 3D Surface can be seen. In this research, scour monitoring laboratory open channels (flume) MDO fine aggregate material basis retrieval data performed after installing three times variations flow discharge, then were processed Surfer. first used water level +3.50 carried 3.77%. second +4.50 11.16%. third +5.70 25.46%. So continuous method, total 36.27% is equivalent 12575.77 cm3.