Flood routing analysis of the lower reaches of Tayang river based on MIKE FLOOD

The ra infall in t he low er r eaches of the Tayang river is abundant and frequently causes flood disasters. It is urg ent to build a floo d r outing analysis model fo r the river to pr ovide suppo rt fo r the formulation o f scient ific floo d co ntr ol and disaster mitig atio n measures. Based on the measured sectio n data and hig h2precision DEM of the low er reaches of the Tayang river, w e established a 12D hydrodynamic model of the river section and a 22D hydro dy namic model o f the flo od t hr eat zo nes on bo th banks by M IKE FLOOD, and r ealized t he r eal2time dynamic coupling of the tw o. T hen w e analyzed the evo lution pro cess and inundat ion risk o f a 502year flood in the lower r eaches, calculated the inundatio n r ang e and w ater depth dist ribution in differ ent periods, and analyzed the rationalit y of t he calculat ion results using w ater balance analysis and flow field distributio n. The re2 sults show ed that the model can eff ectively simulate the pr ocess of flood routing and risk distributio n in the low er reaches of the Tayang River. T he calculat ion r esults w ere r easonable and reliable, and can pr ov ide important basic info rmation fo r reg ional floo d co ntr ol command, f loo d risk manag ement, and flood contro l plan formulatio n.

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