Jialing River Feng Instrument Of The Channel Bed Load Movement Characteristics And Research Governance

As a tier one tributary of the upper Yangtze river,Jialing river is not only one of the national inland high-grade waterway in sichuan,but also the north-south water transportation trunk line of sichuan province.The water route communicates the southwest and northwest which is combat readiness channel and an important system of inland waterway transport of the province’s "a horizontal two vertical six line".The shipping development of jialing river is not only related to the economic development of sichuan province,but also the economic development of neighboring provinces and cities and even the whole country.The river section of fengyi reservoir is an important part of the trunk stream of the jialing river,which plays an extremely important role.At present,the channel grade of the reservoir area is the grade level.According to the level of the grading channel,it does not meet the requirement of the channel scale to focus on the river section of the eight characters in the backwater area of the fengyi reservoir area.The study of the river is a typical mountain bend branching stream,and the riverbed is composed of sandy pebbles which is a wide distribution of particle size and a large median diameter.So the fengyi instrument of reservoir change backwater river beach navigation-obstructing characteristics and regularity of pebble bed load transport,carry out the analysis of the measures within the reservoir regulation,the waterway regulation results play an important role.This study is based on the change of the backwater section of the fengyi reservoir area in jialing river.Collected the hydrological and riverbed terrain data,and analyzing the evolution of riverbed in the river section of fengyi reservoir area.This paper describes the characteristics of the movement in the mountainous area,and the analysis and research on the analysis of the sediment load of the pebbles are complished buy the measured data.In this paper,a two-dimensional mathematical model of two-dimension water sand is established which is in the area of eight characters in the fengyi reservoir area.Two kinds of waterway regulation schemes are proposed for the actual beach risk,and the following conclusions are drawed:(1)The evolution analysis of riverbed shows that the deep line is not much changed in the reservoir area except the small changes in the end and the corner.From the evolution of the cross section analysis,we concluded that the overall development of the river bed is relatively stable.Because the history channel for the right slot and the long-term mining,the left bank is deposited and the right bank is eroded.(2)Through the research of previous scholars : Ed qualitative motion is random,intermittent and the characteristics of discontinuity.Through the measured data,summed up the law that the bed load transport along the jialing river;based on the measured riverbed data,the analysis and summary of the scouring and silting are carried out,and a schematic diagram of the distribution of pebbles in the river is drawn.(3)The established mathematical model of two-dimensional water-sediment is used to carry on the hydrodynamic calculation and the bed scouring after the plan,which concluds that though the two plans are to solve the problem of bank risk,the proposal is left slot scheme as the recommended scheme of waterway regulation.It is because that through the consideration of engineering economy,such as one way to reduce the channel distance and save the cost of the ship.