In another hand any river is divided into flow tubes,and we can applied FVM to the flow tubes according to mass conservation principle and established the finite volume model in CCF.

• 对于河流流场，采用划分流管的方法计算流场，并将有限体积法的思想应用到流管，根据质量守恒原理，在流管内建立浓度场的有限体积。