Research On Qujiangchannel Navigation Condition

Qujiang river channel of mountain stream shallow water channel, from quzhou double port-lanxi origin MaGong beach long about80km, channel depth general water is0.7～1.2m, channel width100～250m, because the beach, water shallow, channel more bending, general bending radius more than500m, minimum place for150m. Bed gradient, quzhou to longyou, longyou to lanchi origin of head were19m,17m, average gradient were0.47%o,0.42%o. Bed material to sand pebble is given priority to, local reach a bedrock exposed. At present the basic channel for natural state, with JiangSha qu in recent years a large number of stone excavation, channel depth condition has been improved, but the water is shallow, beach disorderly is restricted qu jiang waterway development of the main factors. Already built bottom and streams beach water conservancy hub unbuilt lock, because two hub about40km apart, water level can’t cohesion, still cannot achieve the purpose of navigation. The existing channel level is low, the through capacity, grade channel mileage short, only longyou to lanchi origin channel17.1km (quzhou territory), in level period navigable20-40tons ships, dry season only through10tons of wooden junk, madam, the rest of the main stream and tributaries almost stopping. Therefore, qu jiang construction bottom, AnRen shop, red boat bean, streams beach, swim port and yao home six steps, the red ship bean terminal is located in the territory of QuZhouShi, swim port and yao home hub is located in the territory of jinhua. To qu jiang waterway according to inland water level4channel regulation standard, to qu river navigable all500t ship target, recovery and revitalization of the QuZhouShi water transportation cause, and with the valley flood control, power generation, irrigation and drainage, environmental protection, urban construction and port development integration of multi-objective comprehensive development.Due to the current situation under the condition of qu jiang navigation condition is bad, it is difficult to meet the demand of cross-strait economic and social development, Quzhou City proposed construction in quzhou tadi, AnRenpu, hongchuandou, xiaoxitan four hubs and locks, and through the channel regulation to improve the qu jiang quzhou section of navigation capabilities. Taking qu jiang quzhou section as the research object, establish the river one-dimensional water sand moving bed mathematical model and the key of a two-dimensional mathematical model of water and sediment by one-dimensional and two-dimensional water and sediment mathematical model solution, calculate the playback status under the condition of flow and sediment characteristics, evaluation of status quo of river navigation ability, analyses the problems existing in the river navigation. On this basis, the research and construction in qu jiang quzhou tadi, AnRenpu, hongchuandou, xiaoxitan, four streams beach cascade hub of river navigation ability improvement and possible problems, And qu jiang (quzhou section) each step of the rationality of the layout and dredging for further argument, n, improve navigation assurance, all levels of the overall scheme of the hub and operation scheduling, make the river navigable, to maximize the benefits of flood control, power generation, etc.