Experimental Study On Regime Relationship And Stability Index Mark Of Straight Alluvial River

Regime relationship and stability index mark of straight alluvial river, it has always been important issues of riverbed evolution morphology.Straight in order to explore the nature of regime relationship and stability index mark of straight alluvial river, using flume experiments and the oretical analysis of the research methods, research in different partical size, different gradient and different flow quantity conditions, the use of hydraulic geometry method to fitting a straight alluvial river erosion stable width, depth, velocity with particle size, gradient, flow quantity associated formula and dimensional analysis were compared, using the critical point of the measured data of the straight river washed into bending, fitting stability index mark for the straight river.Straight river erosion processes in the rate of transportion of bed load is inversely proportional with the width changes. A straight flow of the river washed away in a process, the width gradually widened until stable for a certain value, no longer increasing; transport rate gradually decreased until stable for a certain value, not decrease.Straight river after the river washed away, the stability of the measured bed load transportion rate matched with Einstein revise formula(2007).Using the measured data fit a pilot study in stability index mark, determine the value type of straight river and bed river. To explore the application of the straight alluvial river river-type relation, through the hydraulic geometry and dimensional analysis method to be associated river-style, with the measured value and the deviation between the calculated rate and the variance compared the two methods proposed by the formula law hydraulic geometry of the width, depth and average velocity formula more suitable for the expression of straight alluvial river associated river.