关键词: 水深平均, 有限元, 伽辽金加权余量法, NewtonRaphson迭代法

Abstract: The?planar?2-D?mathematical?model?is?established?by?depth-averaged?finite?element?method.?The?current?field?of?Rentuo?District?in?Jiangjin?is?preferably?simulated?by?Galerkin?method?of?weighted?residuals?that?disperse?the?equations?and?Newton-Raphson?non-linear?iteration.?The?result?proves?to?be?reliable?and?satisfying?through?the?verification?of?actual?surface-line?and?velocity?of?flow?of?Rentuo?reach?in?Qijiang.

Key words: depth-averaged , finite element method , Galerkin method of weighted residuals , Newton-Raphson non-linear iteration ;