Research On Waterway Regulation Technology

The Beijiang river is the water channel between the north of Guangdong and the pearl river delta.many large enterprises have accumulated along the river.the development of water transport is very important to the economic and social development of the Beijiang river basin.However,with the continuous construction and excessive sand excavation in the Beijiang river basin,the backwater discontinuity between the white stone junction and Feilaixia hub is not engagement due to the uneven outflow discharge and clear water discharge,the problem of channel grounding is particularly prominent due to insufficient scour in downstream of the junction.Through analysis and research,it is concluded that the shoal in the downstream of Baishi kiln is the key and difficult point for waterway regulation.the risk structure of this section is varied and characteristics are very different,and the operation mode of the upstream and downstream hydro-junction is obvious,and the difference between the water level and the maintenance water depth is only 0.8-1.0 m,which seriously restricts the development of the waterway and the ship passing ability.This paper expounds the research on waterway regulation of the downstream section of Baishi kiln.According to the data of discharge flow,sediment load change,flow process and topographic characteristics of the white stone water control project,the characteristics of flow and sediment,geological and geomorphological features,channel status and prospect planning are analyzed,and the river bed evolution and obstruction characteristics of engineering regulation reach are studied Through the establishment of two-dimensional mathematical model of two-dimensional flow,the Metamorphosis model,numerical calculation and model test research,analysis of the project regulation river flow characteristics,the channel regulation project of the downstream section of Baishi kiln is proposed.The conclusion is that the velocity increase of the downstream section of Baishi kiln is limited,the water and sediment conditions before and after treatment at the downstream of Baishi kiln are basically maintaining the current situation,and the problem of siltation in the local area is difficult to avoid.In order to ensure the normal shipping of the lower reaches of the white stone,it is suggested that grab bucket dredger and other dredging equipment and equipment should be equipped in this section,and the manpower,material and financial resources should be organized.In March,July and November,the prototype observation of the downstream reaches of Baishi kiln is carried out,according to the measured figures and water level and sediment data,the evolution law of the riverbed is analyzed,and corresponding dredging construction schemes are formulated when necessary to clear the obstacles in time,so as to ensure the safe and smooth passage of the channel downstream of the Baishi kiln.