river channel dredging的意思|示意

Nicaragua sent the soldiers there last year when it began dredging a channel around the island in the San Juan river, which marks the border between the two countries.

去年尼加拉瓜开始派士兵岛这个岛屿附近的圣胡安河上挖通道，圣胡安河是两国的界河。

Besides the extension length of sedimentation, the factors that effected the river course are channel pattern, process of water and sediment and dredging.

影响河口河道好坏的因素，除淤积延伸长度外，还应包括河槽形态、水沙过程、河口疏浚等。