LI Zhijia, JIANG Tingting, HUANG Pengnian, LIU Zhiyu, AN Dong, YAO Cheng, JU Xingshun. Impact and analysis of watershed precipitation and topography characteristics on model simulation results[J]. Advances in Water Science, 2015, 26(4): 473-480. DOI: 10.14042/j.cnki.32.1309.2015.04.003
Citation: LI Zhijia, JIANG Tingting, HUANG Pengnian, LIU Zhiyu, AN Dong, YAO Cheng, JU Xingshun. Impact and analysis of watershed precipitation and topography characteristics on model simulation results[J]. Advances in Water Science, 2015, 26(4): 473-480. DOI: 10.14042/j.cnki.32.1309.2015.04.003

Impact and analysis of watershed precipitation and topography characteristics on model simulation results

  • Appropriate hydrological models for any given watersheds can be determined through the simulation performance of these models; however, well understanding the runoff generation characteristics of a given watershed can significantly reduce the workload to select the appropriate models from a large number of conceptual models for this watershed, also can solve the problem of hydrologically similar ungauged watersheds. In this study, we selected six conceptual hydrological models and applied them to three semi-humid and semi-arid watersheds to explore the relationships between model structures and watershed characteristics, and to analyze the impact of precipitation and topography on model simulation results. The results show that the topography and vegetation of watershed have important impacts on runoff generation and concentration. Due to the phenomenon of partial area runoff generation in such watersheds, the impact of river slope is greater than that of watershed average slope. The underlying surface conditions have a larger effect than precipitation conditions when the catchments have similar climate. Therefore, we can choose the appropriate hydrological models to get better predictions according to known runoff characteristics of catchments. Models with both saturation-excess and infiltration-excess mechanisms can be better used in the semi-humid and semi-arid catchments.
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