The downward rush is halted when the water table is reached. Here the slow-flowing river carves tunnels with a more rounded profile.
水流到达地下水位后便停止下流。这里缓缓流动的河流切割出一条圆形隧道。
The downward rush is halted when the water table is reached. Here the slow-flowing river carves tunnels with a more rounded profile.
水流到达地下水位后便停止下流。这里缓缓流动的河流切割出一条圆形隧道。
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