upstream

State officials defend the Newsom administration’s efforts to help salmon populations recover, include restoring tidelands, removing barriers that block fish migration and reintroducing salmon in traditional spawning areas upstream from dams.

It comes after Pakistani officials said India had warned it would release water from major dams upstream, causing heavy flooding in parts of what is Pakistan's most populous province.

The construction of the main part of Three Gorges Dam in 2006 didn't directly impact the finless porpoise, which don't have to go upstream to spawn, although it did affect the fish they eat.

They could have been submerged in separate places upstream and taken by the current to the foot of the Choisy bridge.

In 2024, a team of Bowling Green State University biology students recorded a significant reduction in cyanobacteria in Northwest Ohio’s Sandusky Bay thanks to the removal of an upstream dam.