A cusp catastrophe model for alluvial channel regime and classification of channel patterns
Y. Xiao1, X. J. Shao2, and Y. Yang21National Inland Waterway Regulation Engineering Research Center, Chongqing Jiaotong University, Chongqing 400074, China 2State Key Laboratory of Hydroscience and Engineering Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
Received: 25 Dec 2013 – Accepted for review: 15 Feb 2014 – Discussion started: 24 Feb 2014
Abstract. A cusp catastrophe model for alluvial channel regime is established by selecting suitable parameters to reflect channel stability. An equation is obtained from the equilibrium state of channel regime, which is a cusp catastrophe surface in a translated three dimensional coordinate. The stability of channel patterns can be identified by such a model in a direct way, and the 2-D projection of the cusp catastrophe surface can be used to classify alluvial channel patterns. Predictions based on this model are consistent with field observations involving about 100 natural rivers. The results indicate that this method may be applied to study the regime of natural rivers and to assist decision making in river engineering.
Xiao, Y., Shao, X. J., and Yang, Y.: A cusp catastrophe model for alluvial channel regime and classification of channel patterns, Geosci. Model Dev. Discuss., 7, 1477-1497, doi:10.5194/gmdd-7-1477-2014, 2014.