چکیده مقاله
A non linear complete method of solution NCM for prediction of unsteady varied flow sediment change at an estuary was developed and tested with river data This method NCM then was compared with other available non linear and linear implicit models when applied to some classical upstream flow sediment variation problems showed better performances An example of estuary was solved, to see how the models respond to a tidal variation downstream of a reach The magnitude of nonlinear terms in the momentum and sediment continuity equations 1 5 increased due to rapid variation of flow The model developed can simulate both steady and unsteady varied flows for water and sediment transport through rivers Significance different between non linear and linear models applied to flow –sediment routing case problems was treatment of the non linear terms in the momentum and sediment continuity equations The differences between the models were shown to be magnified when there was large spatial or temporal variation in discharge or depth in the case of high varied flow Also coupled and uncoupled models differed in the treatment of boundary conditions and bed level changes term in the momentum equation In particular boundary conditions involving the term cannot in an uncoupled model
کلیدواژهها
نویسندگان
G.Akbari
Civil Engg, USB, Zahedan,Iran
شیوه ارجاع
G.Akbari, ,1385,Non-linear method of solution for tidal flow-sediment variation at the downstream end of a reach,7th International Congress on Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات هفتمین کنگره بین المللی مهندسی عمران17 اردیبهشت 1385 · تهران