Sedimentation amount determination support method and sedimentation amount determination support device

摘要

PPROBLEM TO BE SOLVED: To determine proper laid sand quantity in the dam of a hydroelectric power station. PSOLUTION: A laid sand quantity determination support device 1 obtains terrain conditions and a flood pattern including laid sand quantity (S201, S202), and initially sets a time t (S203), and obtains a flow rate QSPn-1/SPin a time t-t from a flood pattern (S204), and obtains a cross-section ASPn/SPand the depth of water h of running water at each position x in a time t by the continuous expression of a law of conservation of mass (S205), and obtains a flow rate Q and a flow speed u of running water at each position x in the time t by the equation of motion of a law of conservation of a momentum (S206), and calculates moving quantity qSBsi/SBof earth and sand at each position x in the time t from the flow speed u and a particle diameter d (S207), and calculates bed height H at each position x in a time t+t from the moving quantity qSBsi/SB(S208), and updates the time t (S209), and when a time is not after the end time of flood (S210: N), returns to S204, and when a time is after the end time (S210: Y), displays the distribution of the bed height at a display part 12 (S211). PCOPYRIGHT: (C)2010,JPO&INPIT