淤泥清除设施、渠道及沙井应进行保养，而沉淀的淤泥和砂砾应定期清除。
Silt removal facilities, channels and manholes should be maintained and the deposited silt and grit should be removed regularly.
清除淤泥，发现鱼类产卵的砾石层，找到合适的鲑鱼种类来重建种群是一项艰巨的任务。
Removing the mud, uncovering gravel beds where fish spawn, and finding suitable salmon types to rebuild the population is a daunting task.
有关计划包括改善水产登陆中心、晾晒场地和拍卖中心，以及疏浚河口以清除海浪冲来的淤泥。
The planning involves improvements to fish landing centers, drying platforms and auction centers, as well as the dredging of river mouths to remove the silt deposited by the waves.
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