Chaotic Monitoring of River Flow Using Phase Space Reconstruction Method

Recent studies have proven the importance and functionality of phase space reconstruction model based on the delay time approach. The main scope in this research was to develop the phase space in order to analyze and describe the event inside it. The flow discharge has been considered for Band-e-Bahman station in daily, weekly and monthly scale in period of 1348 and 1385; Iranian calendar (1969 – 2006). Firstly the embedding dimension has been calculated as 3 based on the simplistic method. Then the phase space have been developed using the time delay approach. Results indicated less chaotic manner for daily data according to cloudy trajectories of the phase space. Monthly and weekly flow time series indicated more chaotic manner. According to phase space analysis; 5 very heavy one day raining at Band-e-Bahman station and 12 very heavy one day raining at basin could be distinguished. Besides, 6 and 11 intensive heavy raining with one week durability were pointed at the station and the basin, respectively. The river flow discharge varied between 0 to 140 cubic meter per second for daily scale, 1.5 to 60 cubic meter per second for weekly scale, and 1 to 23 cubic meter per second for monthly scale.