Authors: ZHANG Shao-hui ^{1, 2}, XU Di ^{1, 2}, LI Yi-nong ^{1, 2}
1. National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
2. China Institute of Water Resources and Hydropower Research, Beijing 100048, China

Abstract: The differences of stability convergence, precision and efficiency of the 2-D surface hydrodynamic model for border strip irrigation between the hybrid numerical method proposed by the authors and the Roe finite volume method, were compared and analyzed based on the observation data of typical border strip irrigation tests. Meanwhile, the computational performance and simulation effect were validated. The results show that the hybrid numerical method exhibits better numerical stability and convergence, and less water quality balance error and average relativity error than the Roe finite volume method. The computational efficiency of hybrid numerical method is about 4 times as much as that of Roe's method in the same measurement circumstance. Consequently, 2-D strip irrigation numerical model based on the hybrid numerical method can obviously elevate the computational stability and convergence and effectively improve computational precision and efficiency.

Key words: basin irrigation, 2-D surface water flow, numerical method, convergence, stability, precision, efficiency
Published in: Journal of Hydraulic Engineering, Vol. 42, No. 3, 2011
Article ID: 0559-9350 (2011) 03-0323-06