Two2dimensional hydrodynamic model and its application of levee2breach flood
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Abstract:
In or der t o reduce the significant lo ss o f life and pro pert y caused by levee2breach flood and to im pr ove the no n2pro jec2 tive measur es in f loo d contr ol and disaster pr evention, a two2dimensional hydrodynamic model w as dev eloped t o simulate levee2 br each flo od accurately. Dyke bro adening w as taken into account, lo cal model gr ids w er e r efined, and t he model was optimized u2 sing the hot start, dry wat er depth, and wet water dept h theory . In this paper , the mo del w as applied to simulate the levee2breach floo d r outing in the southern ir rigated area of I nner Mo ng olia section o f the Yellow River . T he actual dike burst data in Kuisu reach o f the Yellow River w ere used to ver ify the model. The r esults show ed that t he flow field is smoot h and w ell2 distr ibut ed, which indicated that the research results are reasonable and r eliable. The mo del was also applied to simulate the wo rking condi2 tions that two dike bur st occurred at Shagedu eng ineering and Kuisu reach r espectively. Flood risk maps w ere plotted, w hich can pr ov ide impo rtant technical suppo rt fo r the flood contro l r isk manag ement and decisio n in the area.
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