y absorbing the advantages of both FEM and FDM,unsteady depth-averaged flow and water quality mathematical models have been established with irregular triangular meshes, in which upstream technique is applied in connective terms to improve computational stability.
应用不规则三角形网格，结合有限元法和有限差分法的优点，对易引起不稳定的对流项采用迎流技术，建立了非恒定水深平均的水流数学模型和水质数学模型。