The river is blocked up with ice.

河道被冰块叉住了。

《新英汉大辞典》

In each case, the glacier surged as much as two kilometers down the valley and blocked the Abdukagor River with ice DAMS as much as 100 meters high.

每一次冰川都顺着山谷向前冲击了大约2千米，冲击所形成的冰块大坝阻塞了Abdukagor河，使其标高达到100米之高。

youdao

The two lakes were created when the quake caused landslides that blocked the Qingjiang River in Qingchuan county.

由于地震造成的滑坡阻断了四川清江，形成了两个人工湖。

youdao

They had blocked the Tennessee River above and below the city.

VOA: special.2009.11.26

The Iraqis blocked three bridges across Tigris River from the eastern side with large concrete blocks and dump trucks, moving antiaircraft and artillery weapons on their side of the bridges.

CNN: Capital has look of a battlefield

Rachel McDonald, the pub's owner, said there was "lots of mud everywhere" and said the river had been blocked by a fallen tree trunk.

BBC: Homes in Somerset are flooded as river bursts

According to the journal discovered with his body, McCandless had tried to hike out after three months but had found his way blocked by the swollen waters of the Teklanika River, which had risen dramatically since he forded it on his way in.

BBC: Journey into the Alaskan wild