Removed or Replaced Barriers

Fish passage barriers include both natural and artificial obstructions that either block or impede fish passage or have the potential to block or impede fish passage....鱼类洄游障碍（Fish passage barriers）涵盖自然障碍物与人工障碍物两类，此类障碍物既会直接阻断或阻碍鱼类洄游，亦存在阻断或阻碍鱼类洄游的潜在可能。